As filed with the Securities and Exchange Commission on July 14, 2020

Registration No. 333-239542

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

Amendment No. 1

to

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Montrose Environmental Group, Inc.

(Exact name of Registrant as specified in its charter)

1 Park Plaza, Suite 1000

Irvine, CA 92614

(949) 988-3500

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Vijay Manthripragada

President and Chief Executive Officer

Montrose Environmental Group, Inc.

1 Park Plaza, Suite 1000

Irvine, CA 92614

(949) 988-3500

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this registration statement is declared effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box.  ☐

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

Subject to completion,

Preliminary Prospectus dated July 14, 2020

P R O S P E C T U S

10,000,000 Shares

Montrose Environmental Group, Inc.

Common Stock

This is Montrose Environmental Group, Inc.’s initial public offering. We are selling 10,000,000 shares of our common stock.

We expect the public offering price will be between $15.00 and $17.00 per share. Currently, no public market exists for the shares. After pricing of the offering, we expect that the shares will trade on the NYSE under the symbol “MEG.”

We are an “emerging growth company” as defined under the federal securities laws and, as such, may elect to comply with certain reduced public company reporting requirements for this filing and future filings. See “Prospectus Summary—Implications of Being an Emerging Growth Company.”

Investing in the common stock involves risks that are described in the “Risk Factors” section beginning on page 19 of this prospectus.

The underwriters may also exercise their option to purchase up to an additional 1,500,000 shares from us, at the public offering price, less the underwriting discount, for 30 days after the date of this prospectus.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The shares will be ready for delivery on or about                     , 2020.

The date of this prospectus is                     , 2020.

TABLE OF CONTENTS

Neither we nor any of the underwriters have authorized anyone to provide any information or to make any representations other than those contained in this prospectus or in any free writing prospectuses we have prepared. Neither we nor any of the underwriters take responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. This prospectus is an offer to sell only the shares offered hereby, but only under circumstances and in jurisdictions where it is lawful to do so. The information contained in this prospectus is current only as of its date, regardless of the time of delivery of this prospectus or of any sale of our common stock.

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GENERAL INFORMATION

Industry and Market Data

The data included in this prospectus and, in particular, in the sections entitled “Prospectus Summary” and “Business,” regarding markets and the industry in which we operate, including the size of certain markets and our position and the position of our competitors within these markets, are based on publicly available information, reports of government agencies, published industry sources and the Environmental Industry Study prepared by Environmental Business International, Inc., or EBI, in October 2019, which study we commissioned. Additional sources of industry and market data included in this prospectus are as follows: World Bank and Institute for Health Metrics and Evaluation, The Cost of Air Pollution: Strengthening the Economic Case for Action (2016).

In presenting this information, we have also made certain estimates and assumptions that we believe to be reasonable based on the information referred to above and similar sources, as well as our internal research, calculations and assumptions based on our analysis of such information and our knowledge of, and our experience to date in, our industries and markets. Market share data is subject to change and may be limited by the availability of raw data, the voluntary nature of the data gathering process and other limitations inherent in any statistical survey of market share data. In addition, customer preferences are subject to change. Accordingly, you are cautioned not to place undue reliance on such market share data or any other such estimates. While we believe such information is reliable, neither we nor the underwriters can guarantee the accuracy or completeness of this information, and neither we nor the underwriters have independently verified any third-party information and data from our internal research has not been verified by any independent source. While we believe the estimated market and industry data included in this prospectus are generally reliable, such information, which is derived in part from management’s estimates and beliefs, is inherently uncertain and imprecise.

Projections, assumptions, expectations and estimates of our future performance and the future performance of the industries and markets in which we operate are necessarily subject to a high degree of uncertainty and risk due to a variety of factors, including those described in the sections entitled “Risk Factors” and “Forward-Looking Statements.” These and other factors could cause results to differ materially from those expressed in the estimates made by the independent parties and by us.

Trademarks

We own or have the rights to use various trademarks, service marks and trade names that we use in connection with the operation of our business. This prospectus may also contain trademarks, service marks and trade names of third parties, which are the property of their respective owners. Our use or display of third parties’ trademarks, service marks, trade names or products in this prospectus is not intended to, and does not, imply a relationship with, or endorsement or sponsorship by or of, us. Solely for convenience, the trademarks, service marks and trade names presented in this prospectus may appear without the ^®, TM or SM symbols, but such references are not intended to indicate, in any way, that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks, service marks and trade names.

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RISK FACTORS

Investing in our common stock involves a high degree of risk. You should carefully consider the risks and uncertainties described below, together with all of the other information in this prospectus, including the financial statements and the related notes appearing elsewhere in this prospectus, before making an investment decision. If any of the following risks actually occurs, our business, financial condition and results of operations could be materially and adversely affected and the trading price of our common stock could decline, causing you to lose all or part of your investment in our common stock.

Additionally, the COVID-19 pandemic may amplify many of the risks discussed below to which we are subject and, given the unpredictable, unprecedented and fluid nature of the pandemic, it may materially and adversely affect us in ways that are not anticipated by or known to us or that we do not consider to present significant risk. Therefore, we are unable to estimate the extent to which the pandemic and its related impacts will adversely affect our business, financial condition and results of operations as well as our stock price following completion of this offering.

Risks Related to Our Business and Industry

Our limited operating history may make it difficult to evaluate our business, which may be unsuccessful.

We have a limited operating history since our inception in 2012. As such, there is limited information on which to base an evaluation of our business and prospects. Our operations are subject to all of the risks inherent in the establishment of a recently formed business. Our success may be limited by expenses, difficulties, complications, problems and delays, including the need for additional financing, uncertainty surrounding our research and development efforts, challenges with the successful commercialization of our services, market and client acceptance of our services, unexpected issues with federal or state regulatory authorities, competition from larger organizations, uncertain intellectual property protection, fluctuations in expenses and dependence on corporate partners and collaborators. Any failure to successfully address these and other risks and uncertainties commonly associated with early stage companies could seriously harm our business and prospects, and we may not succeed given the technological, marketing, strategic and competitive challenges we will face in the sectors in which we operate or may choose to operate in the future. Any evaluation of our business and our prospects must be considered in light of these factors and the other risks and uncertainties frequently encountered by companies in our stage of development. No assurance can be given that we will successfully navigate these issues or implement any of our plans for future growth in a timely or effective manner, including our acquisition strategy, which would negatively impact our business, financial condition and results of operations.

We have a history of losses and may not be able to achieve or sustain profitability in the future.

While we have been able to generate revenues, we may not be able to increase the amount of revenues we generate, and we might incur net losses for some time as we continue to grow. We experienced net losses in each year since inception, including net losses of $23.6 million and $16.5 million for the fiscal years ended December 31, 2019 and December 31, 2018, respectively, and we may incur net losses in the future. As of December 31, 2019, we had an accumulated deficit of $64.4 million. It is difficult for us to predict our future results of operations, and we expect our operating expenses to increase significantly over the next several years as we continue to hire additional personnel, expand our operations and infrastructure, integrate completed acquisitions, make and integrate future acquisitions and invest in research and development. In addition to the expected costs to grow our business, we also expect to incur significant additional legal, accounting and other expenses as a newly public company. If we fail to increase our revenue to offset the increases in our operating expenses, we may not achieve or sustain profitability in the future.

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General global economic, business and other conditions and our vulnerability to the cyclical nature of the sectors and industries in which our clients operate, may adversely affect our business.

We compete in various end markets and geographic regions domestically and around the world. We provide environmental services to clients operating in a number of sectors and industries, including the financial, oil & gas, utilities, construction, automotive, real-estate, midstream energy, manufacturing, commodities, petrochemical, tobacco, food and beverage, telecommunications and engineering industries, as well as local, state, provincial and federal government entities. These sectors and industries and the resulting demand for our services have been, and we expect will continue to be, cyclical and subject to significant fluctuations due to a variety of factors beyond our control, including economic conditions, regulatory requirements, appropriation levels and changes in client capital spending, particularly during periods of economic or political uncertainty. Important factors for our business and the businesses of our clients include macroeconomic conditions, the overall strength of, and our clients’ confidence in, the economy, industrial and governmental capital spending, governmental fiscal and trading policies, environmental and regulatory policies the strength of the residential and commercial real estate markets, unemployment rates, consumer spending, availability of financing, interest rates, tax rates and changes in tax laws, political conditions, energy and commodity prices and programs such as renewable fuel standard programs and low-carbon fuel standard programs.

While we attempt to minimize our exposure to economic or market fluctuations by serving a balanced mix of end markets and geographic regions, any of the above factors, individually or in the aggregate, or a significant or sustained downturn in a specific end market or geographic region, can impact our business and that of our clients. These factors may make it difficult for our clients and us to accurately forecast and plan future business activities; neither we nor our clients can predict the timing, strength or duration of any economic downturn or subsequent recovery. Furthermore, if a significant portion of our clients or projects are concentrated in a specific geographic area or industry, our business may be disproportionately affected by negative trends or economic downturns in those specific geographic areas or industries. These factors may also cause our clients to reduce their capital expenditures, alter the mix of services purchased, seek more favorable price and other contract terms and otherwise slow their spending on our services. In addition, due to these conditions, many of our competitors may be more inclined to take greater or unusual risks or accept terms and conditions in contracts that we might not deem acceptable. These conditions and factors may reduce the demand for our services and solutions, and more generally may adversely affect our business, financial condition and results of operations.

The COVID-19 pandemic has adversely affected our business and may continue to do so.

On March 11, 2020, the World Health Organization designated the global outbreak of a new strain of coronavirus, COVID-19, a pandemic. The global and domestic response to the COVID-19 pandemic by both governments and businesses has been unprecedented and continues to rapidly evolve. Responsive measures have included mandates from federal, state, provincial and/or local authorities that restrict movement and travel, such as quarantines and shelter-in-place requirements, and restrict or require closure of some or all commercial and business activity. These measures, though currently temporary in nature and in some cases being lessened or lifted entirely in many geographies, may become more severe and may continue indefinitely depending on the evolution of the outbreak.

Our business has been adversely, and may be materially adversely affected, by the COVID-19 pandemic and the global response. We provide important services to the public’s health, safety, and welfare through a range of services, including air and water quality testing, water treatment, soil remediation, renewable energy generation, environmental response, and COVID-19 response support and therefore most of our business requiring on-site or in-office or laboratory work has been classified as “essential” in most jurisdictions in which we operate. As such, most of our business has remained open and operational thus far. However, there is no guarantee that this classification will not change in the future or that we will not voluntarily limit or cease operations in one or more markets if we believe doing so is necessary or otherwise in our best interests, including for the health and safety of our employees. We have experienced some postponements and cancellations of

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projects in our Measurement and Analysis segment as a result of the COVID-19 pandemic. These delays and cancellations are expected to adversely affect our results of operations, particularly in the second quarter of, and, if pandemic conditions persist, further into, 2020. The closure of client sites, limitations on our ability to travel to client sites and other disruptions to our operations and the availability of the resources we need to provide our services could also adversely impact our ability to provide our services. If any of the third parties with whom we work, including our customers and suppliers, are adversely affected by the pandemic, we could similarly be negatively impacted, even if the pandemic is not directly impacting our operations.

The COVID-19 pandemic has adversely affected many industries as well as the economies and financial markets of many countries, causing a significant deceleration of economic activity. This slowdown has reduced production, decreased demand for a broad variety of goods and services, diminished trade levels and led to widespread corporate downsizing, causing a sharp increase in unemployment. We have also seen significant disruption of and extreme volatility in the global capital markets, which could increase the cost of, or entirely restrict access to, capital. The impact of this outbreak on the United States and world economies is uncertain and, unless the pandemic is contained, these adverse impacts could worsen, impacting all segments of the global economy, and could result in a significant recession or worse, any of which could impact our business.

Considerable uncertainty still surrounds the COVID-19 virus as well as the extent and effectiveness of any potential treatments or vaccines in addition to responses taken on a local, national and global level. The pandemic may become more widespread and that could accelerate or magnify one or more of the risks described above or elsewhere in this prospectus. While we expect the pandemic and related events will have a negative effect on our business, the full extent and scope of the impact on our business and industry as well as on national, regional and global markets and economies is highly uncertain and cannot be predicted. Accordingly, our ability to conduct our business in the manner and on the timelines previously done or presently planned could be adversely affected. Any of the foregoing risks, or other direct or indirect effects of the COVID-19 pandemic that are not currently foreseeable, could materially and adversely affect our business, financial condition and results of operations.

Parts of our business may depend on certain natural or manmade events which are impossible to predict, and our revenue and customer concentration resulting from these businesses may fluctuate significantly based on the frequency and scale of these events.

Certain of our businesses depend on specific environmental circumstances, including both naturally occurring and manmade events. Our Assessment, Permitting and Response segment, in particular, which includes the operations of CTEH, our most recent acquisition, engages in response activities following an environmental incident or a natural disaster. There is no way for us to predict the occurrence of these events, nor the significance, duration or outcome of the events. As a result, this segment may experience revenues one year that are not indicative of future results due to the occurrence of an incident that was neither typical nor predictable. The volatile nature of our environmental emergency response business, and its dependency on factors beyond our control, makes it difficult to predict its potential profitability or success. Any extended period without these types of events or other downturn in activity for these business lines may negatively impact our business, financial condition and results of operations.

In addition, as a result of the nature of these services, our Assessment, Permitting and Response segment may at times experience higher customer concentration levels based on the severity, duration and outcome of environmental emergencies (e.g. those caused by natural disasters and industrial accidents) for which we provide response services. For example, for the fiscal year ended December 31, 2019, 54% of CTEH’s revenues were attributable to just two customers, each of whom engaged CTEH in connection with significant environmental accidents. We cannot predict from period to period whether we will experience risks associated with high customer concentration, including the inability of such customers to pay for our services, and such concentration could have a material adverse effect on our business, financial condition and results of operations.

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We engage in a highly competitive business and any failure to effectively compete could have a material adverse effect on us.

The assessment, permitting and response, measurement and analysis and remediation and reuse industries are highly fragmented and competitive. Our primary competitors in these industries include companies that specialize in one or more services similar to those offered by us on a local or regional basis. We also compete with global, national, regional and local firms specializing in testing, environmental engineering and consulting services, remediation services and other services we provide. Some of our primary competitors include, in our Assessment, Permitting and Response segment, the environmental divisions of Exponent, Trinity Consultants and other small businesses, in our Measurement and Analysis segment, the environmental divisions of SGS, Bureau Veritas and Eurofins, Pace Analytical and environmental divisions of large testing companies and other small businesses, and in our Remediation and Reuse segment, the environmental divisions or remediation segments of NV5, Tetratech, AECOM, other large engineering companies and other small businesses. It is also possible that our clients may establish in-house capabilities to perform certain services that we currently provide.

We operate in markets that are characterized by client demand that is often broad in scope but localized in delivery. We compete with companies that may be better positioned to capitalize on highly localized relationships and knowledge that are difficult for us to replicate. Our potential clients may prefer local providers, whether because of existing relationships or local legal restrictions or incentives that favor local businesses. Smaller regional companies may also have lower cost structures with fewer fixed costs. As a result, efforts to expand, whether organically or through acquisition, or support our service network may not improve our ability to penetrate new local markets or expand our footprint in existing markets. New entrants to our key markets could cause us to lose clients and otherwise harm our competitive position.

Competition in our industry is based on many factors, but we believe the principal points of competition in our markets are the quality, range, pricing, technology and availability of services. Maintaining and improving our competitive position will require successful management of these factors, including continued investment by us in research and development, sales, marketing, technology, customer service and support, personnel and our professional networks. Our future growth rate depends upon our ability to compete successfully, which is impacted by a number of factors, including our ability to identify emerging technological trends in our target end markets, develop and maintain a wide range of competitive and appropriately priced services and solutions, defend our market share against competitors, including new and non-traditional competitors, expand into new markets and attract, develop and retain individuals with the requisite technical expertise and understanding of clients’ needs to develop and sell new services.

We may not be successful in maintaining or growing our competitive position for a number of reasons. Some of our competitors may have access to greater financial or other resources than we do, which may afford them greater power, efficiency, financial flexibility, geographical reach or capital resources for growth. In addition, some of our competitors are vertically integrated and can leverage this structure to their advantage. We may fail to identify optimal service or geographic markets, focus our attention in suboptimal service or geographic markets or fail to execute an appropriate business model in certain service or geographic markets. Our competitors may develop new services or technologies that are superior to ours, develop more efficient or effective methods of providing services or adapt more quickly, efficiently or effectively than we do to new technologies. Our competitors may be positioned to provide better service or influence client requirements, or more quickly respond to changing client requirements, and thereby establish stronger relationships with clients. Our competitors may offer their services at lower prices because, among other things, they possess the ability to provide similar services more efficiently, as part of a bundle with other services or generally at a lower cost. These pricing pressures could cause us to lower the price for any one or more of our services to at or below our costs, requiring us to sacrifice margins or incur losses. Alternatively, we may choose to forgo entering certain markets or exit others, which would limit our growth and competitive reach.

Any failure by us to compete or to generally maintain and improve our competitive position could have a material adverse effect on our business, financial condition and results of operations.

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The success of our business depends, in part, on our ability to execute on our acquisition strategy.

A significant portion of our historical growth has occurred through acquisitions, and we anticipate continued growth through acquisitions in the future. Our growth strategy is primarily dependent on acquiring and integrating the operations of companies in the environmental services industry. In each of fiscal year 2018 and 2019, we acquired seven companies, including Emerging Compounds Treatment Technologies, Inc., or ECT2, and thus far in 2020, we have acquired one company, CTEH, our largest acquisition to date. We are presently evaluating, and we expect to continue to evaluate on an ongoing basis, a variety of possible acquisition transactions. We cannot predict the timing of any contemplated transactions, and there can be no assurances that we will identify suitable acquisition opportunities or, if we do identify such opportunities, that any transaction can be consummated on terms acceptable to us. We also compete for acquisitions with other potential acquirers, some of which may have greater financial or operational resources than we do. A significant change in our business or the economy, an unexpected decrease in our cash flows or any restrictions imposed by our debt may limit our ability to obtain the necessary capital for acquisitions or otherwise impede our ability to complete an acquisition. Certain proposed acquisitions or dispositions may also trigger a review by the U.S. Department of Justice, or DOJ, and the U.S. Federal Trade Commission, or FTC, under their respective regulatory authority, focusing on the effects on competition, including the size or structure of the relevant markets and the pro-competitive benefits of the transaction. Any delay, prohibition or modification required by regulatory authorities could adversely affect the terms of a proposed acquisition or could require us to modify or abandon an otherwise attractive acquisition opportunity. The failure to identify suitable transaction partners and to consummate transactions on acceptable terms could have a material adverse effect on our business, financial condition and results of operations.

Our acquisition strategy exposes us to significant risks and additional costs.

Acquisitions involve risks that the businesses acquired will not perform as expected and that judgments concerning the value, strengths and weaknesses of acquired businesses will prove wrong. We may not accurately assess the value, strengths, weaknesses or potential profitability of an acquisition target, and our acquisition strategy for a particular business may prove to be unsuccessful or expose us to additional risks. For example, because we will soon be implementing a new enterprise resource planning, or ERP, system, we have determined to delay integration of our recent CTEH acquisition, which could lead to duplicative and increased costs and inefficiencies or other problems, including issues with our controls and other accounting systems. We may become liable for certain unforeseen pre-acquisition liabilities of an acquired business, including, among others, tax liabilities, environmental liabilities, contingent liabilities and liabilities for employment practices, and these liabilities could be significant. In addition, an acquisition could result in the impairment of client relationships and other acquired assets such as goodwill. We may also incur costs and experience inefficiencies to the extent an acquisition expands the industries, products, markets or geographies in which we operate due to our limited exposure to and experience in a given industry, market or region. Acquisitions may require that we incur additional debt to finance the transaction, which could be substantial and limit our operating flexibility or, alternatively, acquisitions may require that we issue stock as consideration, which could dilute share ownership. Acquisitions can also involve post-transaction disputes regarding a number of matters, including a purchase price or working capital adjustment, earn-out or other contingent payments, environmental liabilities or other obligations. Our recent growth and our acquisition strategy have placed, and will continue to place, significant demands on our management’s time, which may divert their attention from our day-to-day business operations, and may lead to significant due diligence and other expenses regardless of whether we pursue or consummate any acquisition. We may also not be able to manage our growth through acquisitions due to the number and the diversity of the businesses we have acquired or for other reasons. If any of these risks were to occur, our business, financial condition and results of operations may be adversely affected.

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Any inability to successfully integrate our recent or future acquisitions, or realize their anticipated benefits, could have a material adverse effect on us.

Acquisitions have required, and in the future will require, that we integrate into our existing operations separate companies that historically operated independently or as part of another, larger organization, and had different systems, processes and cultures. Acquisitions may require integration of finance and administrative organizations and involve exposure to different legal and regulatory regimes in jurisdictions in which we have not previously operated.

We may not be able to successfully integrate any business we have acquired or may acquire, or may not be able to do so in a timely, efficient or cost-effective manner. Our inability to effectively complete the integration of new businesses on schedule and in an orderly manner could increase costs and lower profits. Risks involved with the successful integration of an acquired business include, but are not limited to:

Our inability to manage our growth through acquisitions, including the integration process, and to realize the anticipated benefits of an acquisition could have a material adverse effect on our business, financial condition and results of operations.

We may not be successful in promoting and further developing our brands, which could adversely affect our business.

We have a limited operating history as a company and, as a result, the Montrose Environmental brand is not fully established, although many of the brands we use, including those acquired through our acquisition activity, have a longer and more well-established history. Our industry is highly fragmented and we believe that our future success depends in part on our ability to maintain and further strengthen the Montrose Environmental brand across the diverse range of environmental services that we provide. Strengthening our brand will require significant time, expense and the attention of management, and any success will depend largely on our marketing

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efforts and ability to provide our clients with high-quality services. If a client is not satisfied with our services, including those of our technical employees, it may be more damaging to our brand and business as compared to that of larger, more established companies. Additionally, to the extent our clients draw regulatory or media scrutiny regarding their environmental impact or other areas where we may provide services to them, we may as a consequence also draw scrutiny. If we fail to successfully maintain and continue to grow the Montrose Environmental brand and our other brands through promotion and other efforts, incur excessive unanticipated expenses in attempting to promote and maintain our brands, or lose clients as a result, our business, financial condition and results of operations may be adversely affected.

We may work on high profile projects, and any negative publicity or perceived failures of those projects, or litigation resulting from such projects, could damage our reputation and harm our operating results.

We may be engaged on high profile projects that garner public attention and scrutiny, particularly with respect to the emergency response division of the CTEH business. This division of the CTEH business conducts environmental sampling, among other services, in emergency situations and natural disasters, many of which are widely covered by the press and in the public eye, such as implementing a disinfection plan and overseeing the implementation of the plan for a contaminated international cruise ship in the early stages of the COVID-19 outbreak, the Intercontinental Terminals Co, or ITC, fires in 2019 and Hurricane Harvey in 2017. Any mishandling of these situations, even if not our own, could lead to negative publicity. The negative publicity may be attributed to our business and services at no fault of our own other than our association with the project. Our involvement with these high profile projects exposes us to the risk of reputational damage which may have a material adverse effect on our business, financial condition and results of operations. In addition, such high profile projects often lead to an enhanced risk of litigation, and we may be brought into such litigation regardless of our role in the project. Any such litigation proceedings are inherently costly and uncertain, and could have a material adverse effect on our business, financial condition and results of operations.

We may not be successful in expanding our client base or the services we provide to existing clients, which could adversely affect our business.

Our success and the planned growth and expansion of our business depends on our ability to expand into new markets and further penetrate existing markets. Our ability to expand is to a large extent contingent on our services and solutions achieving greater and broader acceptance, resulting in a larger client base, a broader array of prospective clients and expanded services provided to existing clients. However, demand for our services is uncertain, and there can be no assurance that clients will purchase our offerings, or that we will be able to continually expand our client base within existing geographies or into new geographies, whether we expand organically or through acquisition. Expanding our client base is also subject to external factors, many of which are beyond our control, including the overall demand for the services we offer, the actions of our competitors and the finite number of prospective clients in a given market. We cannot provide any assurances regarding our immediate or long-term growth rates in any geographic market or segment, or if we will grow at all. If we are unable to effectively market or expand our offerings to new clients or cross-market our services to existing clients, we may be unable to grow our business or implement our business strategy. Any of the above could materially impair our ability to increase sales and revenue and have a material adverse effect on our business, financial condition and results of operations.

We may not be able to maintain or expand our accreditation and other authorizations, which may adversely affect our ability to provide our services.

A significant part of our business is subject to obtaining and maintaining accreditations, approvals, licensing permits, delegated authority, official recognition and general authorizations at the federal, state, provincial and local level, including in some instances accreditations and licenses for individual professionals. A major risk inherent in our operations is the need to obtain and renew these authorizations. Our operations are also subject to inspection and regulation by various governmental agencies, including the Occupational Safety and

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Health Administration and equivalent state, provincial and local agencies, as well as their counterparts in the various foreign jurisdictions in which we operate. These authorizations are issued by public authorities or professional organizations following application processes, reviews and investigations which are often long and complex, at times resulting in delays in our ability to bid on and execute certain projects. These authorization requirements can also be costly or difficult to meet, and often vary from jurisdiction to jurisdiction, meaning our capacity to obtain such authorizations could affect our ability to provide services in certain regions, states, provinces or localities. Certain authorizations are granted for limited periods of time and are subject to periodic renewal, requiring us to go through similar processes on multiple occasions, which necessitates that we utilize additional financial and operational resources. Authorizations or the requirements to obtain an authorization may also change without notice and we may not be able to comply with the revised or new requirements to maintain one or more of these authorizations.

Although we closely monitor the quality of services performed under our various authorizations, as well as the need to obtain any new authorizations and the renewal and maintenance of our existing portfolio of authorizations, any failure to meet the applicable requirements, whether actual or perceived, could cause us to lose, either temporarily or permanently, one or more of our authorizations. A public authority or professional organization that has granted us one or more authorizations may also decide unilaterally to withdraw such authorizations. Further, we may not be able to obtain or renew the required authorizations for businesses we acquire in the future, or for an organic expansion we wish to pursue, and the failure to obtain these authorizations could limit the opportunity to expand our business.

If we fail to secure or maintain any such authorizations, or if the relevant bodies place burdensome restrictions or limitations on our ability to obtain or maintain the necessary authorizations, we may not be able to operate in one or more jurisdictions and our business, financial condition and results of operations may be materially adversely affected as a result.

Our clients are subject to significant governmental regulation with respect to the environment and any changes to these laws and regulations could have a material adverse effect on our business.

As a company involved in the provision of environmental services, our clients operate in a heavily regulated environment. Our clients are subject to federal, state, provincial and local laws and regulations, including laws and regulations relating to, among other things, air emissions, the release or discharge of materials into the environment and the management, use, generation, treatment, processing, handling, storage, transport or disposal of hazardous wastes and materials. In addition, because of the site-specific nature of our services, the laws and regulations to which we are subject may vary from one state, province or region to another, sometimes substantially. We and our clients are also required to obtain various government approvals, certificates, permits and licenses in order to conduct our respective businesses, which may require making significant capital, operating and maintenance expenditures to comply with applicable laws and regulations.

Any future changes to laws and regulations, including changes to permit requirements, applicable to our clients could have a material impact on their businesses and their service needs. If the needs of our clients change, we may be required to incur significant capital and operating expenditures to shift the environmental services we provide in order to address such needs. If we are unable to address the changing needs of our clients in a timely manner, or at all, demand for our services may decrease, which would have a material adverse effect on our financial condition, results of operations and liquidity.

Our future growth and performance are dependent in part on the impact and timing of potential new laws and regulations, as well as potential changes to existing laws and regulations, including the potential impact of environmental policies of the current presidential administration in the United States or other executives in the foreign countries in which we operate. If stricter laws or regulations are delayed or are not enacted, are enacted with prolonged phase-in periods, or not enforced, if existing laws and regulations are repealed or amended to be less strict or if a generally less restrictive regulatory framework develops, demand for our services may be

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reduced. Conversely, the strengthening or enforcement of regulations may also create operating conditions that limit our business areas or more generally slow our development. In extreme cases, such changes in the regulatory environment could lead us to exit certain markets.

Rapid and/or important changes in current regulations may in the future have a significant adverse effect on our business, financial position and results of operations. Federal and state, provincial legislatures may review and consider legislation that could impact our business and our industry. For example, in response to Presidential Executive Order 13777, calling on each federal agency to establish a regulatory reform task force to evaluate existing rules and recommend repeal, replacement or modification to reduce regulatory burdens, the U.S. Environmental Protection Agency, or the EPA, established a task force and initiated reviews in several program areas. Any repeal of regulations or lack of enforcement of existing regulations stemming from these task forces could impact our future growth. Such legislation or enforcement policies may intensify competition in the markets that we serve, impact demand for some or all of our services or require us to develop new or modified services in order to meet the needs of and compete effectively in the marketplace. Any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

If we fail to attract and retain qualified management and skilled technical personnel, our business may be adversely affected.

Our long-term success depends, in significant part, upon the continued service and performance of our senior management and other key personnel. We rely on knowledgeable, experienced and skilled technical personnel, particularly engineers, analysts, technicians, scientists, policy experts and service personnel to provide environmental services in stringent regulatory markets. Certain of our employees, including our senior management and the key employees of the various businesses we have acquired, have exceptionally strong knowledge of our businesses, sectors and clients. Their departure could lead to the loss of know-how and information of value to us, and their departure could pose a risk to key client relationships. Our continued growth will also depend upon our ability to attract and retain additional skilled management and other key employees, including skilled technical personnel in new markets, whether organically or through acquisitions. For certain of our businesses, there may be a limited number of qualified people to fulfill roles in such businesses. The loss of the services of one or more members of our management team or of qualified employees and other key personnel, or the inability to identify, hire and retain the key personnel that may be necessary to grow our business, could have a material adverse effect on our business, financial condition and results of operations.

Safety-related issues could adversely impact our business.

We often work on complex projects, sometimes in geographically remote locations and in challenging environments. These sites often put our employees and others in close proximity with chemical, manufacturing, construction and other dangerous processes and highly regulated materials. In addition, our employees sometimes handle hazardous materials, including pressurized gases or concentrated toxins and other highly regulated materials, which, if improperly handled, could subject us to civil and/or criminal liabilities. If we fail to implement proper safety procedures or if the procedures we implement are ineffective, or if others working at the site fail to implement and follow appropriate safety procedures, our employees and others may become injured, disabled or even lose their lives, the completion or commencement of our projects may be delayed and we may be exposed to litigation or investigations. Unsafe work sites also have the potential to increase employee turnover, increase project costs, damage our reputation and brand and raise our operating and insurance costs. Any of the foregoing could result in, among other things, financial losses or reputational harm, which could have a material adverse effect on our business, financial condition and results of operations.

We are responsible for the training and safety of our employees at work, and, on occasion, we take on expanded site safety responsibilities, which subjects us to regulations dealing with occupational health and safety. Although we implement what we believe to be appropriate health, safety and environmental work procedures throughout our organization, including hazardous sites, we cannot guarantee the safety of our

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personnel and others for whom we may be responsible. If our employees or others become injured, if we fail to implement appropriate training and health and safety procedures, or if we fail to comply with applicable regulations, among other things, we may be subject to claims, investigations or litigation or required to pay penalties or fines, and our business, financial condition and results of operations could be harmed.

Our safety record is critical to our reputation. Many of our clients require that we meet certain safety criteria to be eligible to bid for contracts or perform on-site services. If our safety record is not within the levels required by our clients, or compares unfavorably to our competitors, we could lose business, incur significant costs or reputational damage, be prevented from working at certain facilities or suffer other adverse consequences. Additionally, we may incur costs to defend our position even if we do not believe we have any liability for a release of or exposure to a hazardous substance or waste or other environmental damage. Any of the foregoing could, among other things, negatively affect our profitability or cause us to lose one or more projects or clients, or otherwise could have a material adverse impact on our business, financial condition and results of operations.

The business of CTEH places its employees in dangerous situations which may present serious and enhanced safety issues that could adversely affect our business.

The CTEH business is focused on assisting companies, governments and communities with responses to and recovery from environmental emergencies and in response to the COVID-19 pandemic. A significant portion of CTEH’s employees work in emergency situations that pose threats to the environment and surrounding communities. Danger of injury or death is inherent in this role, despite safety precautions, training and compliance with federal, state and local health and safety regulations. These employees and any subcontractors we use for such projects are at an enhanced risk of workplace-related injuries given the dangers of their workplace environment. Oftentimes, the risks of the emergency situations are not yet known, and there is no way to predict the magnitude of the danger. While we have insurance coverage in place that we believe is reasonable in addition to policies and procedures designed to minimize these risks, including stringent training, we may nonetheless be unable to avoid material liabilities for an injury or death arising out of these emergency-related hazards. In light of the potential cost and uncertainty involved in litigation, we may settle matters even when we believe we have a meritorious defense. Litigation and its related costs, as well as the damage to our reputation should any employee or subcontractor injury or death occur during these emergency situations, could have a material adverse effect on our business, financial condition and results of operations.

Allegations regarding whether we have complied with professional standards, duties and statutory obligations or our failure to provide accurate results may have an adverse effect on our business.

Our services typically involve difficult analytical assignments and carry risks of professional and other similar liabilities, both directly and through the actions of our testing personnel. In delivering our measurement and analytics services, we provide reports regarding emissions and other testing results to our clients who rely on the accuracy of the data that we gather or analyze on their behalf. Similarly, in delivering our remediation and reuse services, we provide environmental engineering solutions which our clients rely on to design and implement major projects. We take our professional responsibilities very seriously in light of this reliance and the fact that many of our engagements involve matters that could have a significant impact on a client’s business, create substantial financial obligations for the client or prevent the client from pursuing desirable business opportunities. Notwithstanding the fact that our professionals maintain credentials and we perform our services based on our professional expertise and these professional credentials, we face exposure to a variety of claims, ranging from alleged or actual breaches of applicable professional standards, duties and statutory obligations to allegedly inaccurate data and/or faulty analysis.

In certain instances, in performing our services, we may rely on our interpretation of reports or data prepared or gathered by third parties. If such information is not properly prepared or gathered, or is not accurate or complete, we may become subject to claims or litigation, regardless of whether we had any responsibility for

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the error. The CTEH business is often responsible for the presentation of plans and advice in emergency situations, including natural disasters and manmade accidents. While the CTEH employees are not responsible for the ultimate approval of such plans, the failure or minimized success of a plan could expose us to potential litigation and damage to our reputation. Further, claims that we performed negligently, disclosed client confidential information, infringed on intellectual property, falsified data, are required to withdraw due to an apparent or actual conflict, or otherwise breached our obligations to a client, including as a result of actions of our employees, could expose us to significant liabilities to our clients and other third parties and tarnish our brand and reputation.

A client who is dissatisfied with our performance could threaten or bring litigation on the basis of our failure to perform our professional duties in order to recover damages or to contest its obligation to pay our fees, even if our results were accurate or our services were otherwise performed without issue. If the results or design we provided do turn out to be errant or we otherwise fail to meet our contractual obligations, because some of the agreements that we have in place with clients require us to indemnify them for losses that they suffer as a result of errors and omissions or negligence by us, we may be subject to legal liability or required to pay significant damages, and the client relationship could be harmed. Our contracts typically include provisions to limit our exposure to legal claims relating to our services, but these provisions may not protect us or may not be enforceable in all cases. Further, we maintain professional liability insurance and such other coverage as we believe appropriate based on our experience to date, this coverage may prove insufficient. Regardless of any contractual provision or insurance, any client claims could have an adverse effect on our business, financial condition and results of operations.

We generally do not have formal long-term agreements with our clients and attempts by clients to change the terms of or terminate their relationships with us may have a negative impact on our business.

Our operations depend upon our relationships with our clients. Our clients are companies operating in a number of sectors and industries, including the financial, oil & gas, utilities, construction, automotive, real-estate, midstream energy, manufacturing, commodities, petrochemical, tobacco, food and beverage, telecommunications and engineering industries, as well as local, state, provincial and federal government entities. As is customary in our industry, we do not always enter into formal written agreements with our clients, and to the extent we do, such agreements do not generally restrict our clients from altering the terms of the relationship. These arrangements allow clients to attempt to seek concessions, introduce unfavorable terms or limit the services and solutions that we provide to them before a project is finished or as a condition to continued or increased business. The arrangements also generally allow a client to terminate or to decide not to renew their contracts or purchase orders with little or no advanced notice to us. A loss of one or more clients, a meaningful reduction in their purchases from us or an adverse change in the terms on which we provide our services and solutions could have a material adverse effect on our business, financial condition and results of operations.

The failure to successfully implement our new enterprise resource planning system could adversely impact our business and results of operations.

We are currently in the process of implementing a new ERP system to handle the business and financial processes within our operations and corporate functions. The ERP system is a system of integrated applications used to manage our business and automate many functions related to financial reporting, human resources and other services. We expect the implementation to be completed in fiscal year 2020. ERP implementations are complex and time-consuming projects that require transformations of business and finance processes, and any such transformations involve risks inherent in conversion to a new system. These risks include loss of information, the compromise of data integrity and control systems and the potential disruption to our normal business operations and financial reporting processes. The implementation process may be disruptive if the ERP system does not work as planned or if we experience issues relating to the implementation. We also may need to hire consultants or additional personnel for the implementation and post-implementation activities, which can continue for multiple years.

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Following implementation of the ERP, we may experience periodic or prolonged disruption to our financial functions arising out of the system conversion, general use of the system, other periodic upgrades or updates, or other external factors that are outside of our control. Additionally, if the ERP does not operate as intended, the effectiveness of our internal control over financial reporting could be adversely affected and our ability to assess those controls adequately could be delayed. If we experience interruptions in service or operational difficulties as a result of the implementation, and are unable to effectively manage our business during or following the implementation of the ERP system, our business, financial condition and results of operations could be harmed.

If we are unable to develop successful new services or adapt to rapidly changing technology and industry standards or changes to regulatory requirements, our business could be harmed.

The market for our services is characterized by rapid technological change and evolving industry standards and, to a lesser extent, changing regulatory requirements. This constant evolution may reduce the effectiveness of or demand for our services or render them noncompetitive or obsolete. Our continued success and growth depend upon our ability to anticipate these challenges and to innovate by enhancing our existing services and developing and successfully implementing new services to keep pace with the ever-changing and increasingly sophisticated needs of our clients.

New service introductions that are responsive to new technologies and changing industry and regulatory standards can be complex and expensive as they require significant planning, design, development and testing. We may find it difficult or costly to update our services and to develop new services quickly enough to work effectively with new or changed technologies, to keep the pace with evolving industry standards or to meet our clients’ needs. In addition, our industry may be slow to accept new technologies that we develop because of, among other things, existing regulations or standards written specifically for older technologies and general unfamiliarity of clients with new technologies. As a result, any new services that we may develop may not be successful for a number of years, if at all. If we are unable to successfully enhance or update existing services or develop new services to meet these challenges, our business, financial condition and results of operations may be adversely affected.

Public clients involve unique policy, contract and performance risks, and we may face challenges to our government contracts or our eligibility to serve government clients, any of which could materially adversely impact our business.

We derive, and expect to continue to derive in the future, revenues from federal, state, provincial or local government clients, which accounted for approximately 20% of our revenues for the fiscal year ended December 31, 2019. Sales to governments and related entities present risks in addition to those involved in sales to many of our other clients, including policy-related risks such as potential disruption due to appropriation and spending patterns, delays in the adoption of new technologies due to political, fiscal or bureaucratic processes, delays in approving budgets and the government’s right to cancel contracts and purchase orders for its convenience. General political and economic conditions, which we cannot accurately predict, also directly and indirectly affect policies relating to the quantity and allocation of expenditures by government clients. In addition, government contracts may involve long purchase and payment cycles, competitive bidding requirements, qualification requirements, delays or changes in agreed-to funding, budgetary constraints, political agendas, extensive specification development and price negotiations, milestone requirements and the potential unenforceability of limitations on liability or other contractual provisions, any of which may create price pressure and reduce our margins. As a result, we could experience a material adverse effect on our business, financial condition and results of operations.

Each government entity also maintains its own rules and regulations with which we must comply and which can vary significantly among clients. We face risks associated with the failure to comply with such rules and regulations such as bid protests, in which our competitors could challenge the contracts we have obtained, or

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suspension, debarment or similar ineligibility from serving government clients. Challenges to our current or future government contracts or to our eligibility to serve government clients could result in a loss of government sales and have a material adverse effect on our business, financial condition and results of operations.

Our contracts with federal, state, provincial and local governments may be terminated or adversely modified prior to completion, which could adversely affect our business.

Government contracts generally contain provisions, and are subject to laws and regulations, that give the government rights and remedies not typically found in commercial contracts, including provisions permitting the government to:

Governmental authorities may terminate contracts with us either for convenience (for instance, due to a change in perceived needs or a desire to consolidate work under another contract) or if we default by failing to perform under the contract. Upon a termination for convenience, we are generally able to recover the purchase price for delivered items and reimbursement of allowable work-in-process costs. If a governmental authority terminates a contract with us based upon our default, we generally would be denied any recovery for undelivered work, and instead may be liable for excess costs incurred by the government in procuring undelivered work. The exercise by any governmental entity of one or more of these rights under its agreements with us could have a material adverse effect on our business, financial condition and results of operations.

Our profitability will suffer if we are not able to maintain our prices or control our costs.

Our margins, and therefore our profitability, is largely a function of the rates we are able to charge for our services and the costs incurred to provide such services. Accordingly, if we are not able to maintain the rates we charge for our services, or we cannot reduce costs proportionate to any rate reduction, we will not be able to sustain our margins and our profitability will suffer.

The rates we are able to charge for our services are affected by a number of factors, including:

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Our costs are affected by a number of factors, including:

Our profitability is a function of our ability to control our costs and improve our efficiency. As we increase the number of our technical personnel and execute both our strategy for growth, we may not be able to manage a significantly larger workforce, control our costs or improve our efficiency.

Any inability to develop or maintain and protect our intellectual property could have a material adverse effect on us.

We rely on a combination of patents, trademarks, trade names, confidentiality and nondisclosure clauses and agreements and other unregistered rights to define and protect our rights to our brand and the intellectual property used in our business. We also rely on industry and market “know-how” that cannot be registered and may not be subject to any confidentiality or nondisclosure clauses or agreements. Our recent acquisition of ECT2 further expanded our IP portfolio. These intellectual property rights or others we develop, obtain or acquire may not, however, provide us with a significant competitive advantage because our rights may not be sufficiently broad or may be challenged, invalidated or subject to government march-in or sovereign rights or compulsory licensing, sunshine laws or be subject to freedom of information requests or court-ordered public disclosure. Further, our use of contractual provisions, confidentiality procedures and agreements and other registrations may not be sufficient to protect our intellectual property rights, these protective measures may be circumvented or our rights may be misappropriated, disparaged, diluted or stolen, particularly in countries where intellectual property rights laws are not highly developed, protected or enforced. Others may independently develop similar intellectual property or designed-around ours. Our intellectual property may also be replaced by new technologies to which we have no right of use or can only acquire such use at unreasonable or unsustainable costs. Any inability to develop or acquire and maintain the necessary intellectual property rights for our business or to protect our intellectual property rights could have a material adverse effect on our business, financial condition and results of operations.

Claims that we infringe on the intellectual property rights of others could have a material adverse effect on us.

Technology is an important part of our business and, as a result, from time to time others may claim that we have infringed upon, misappropriated, misused or otherwise violated their intellectual property rights. Regardless of the merit of such claims, responding to these types of claims can be expensive, time consuming

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and may divert a substantial portion of management’s time and attention away from running our business. If any aspect of our business is found to infringe the intellectual property rights of others, we could lose critical rights, we may be required to pay substantial damages or on-going licensing or royalty fees or we may be required to redesign, rework, replace or entirely discontinue aspects of our operations, any of which could come at substantial cost and significantly restrict or prohibit our future operations. Further, we may not be able to take any required actions on commercially reasonable terms or at all. Any infringement may also require us to enter into a settlement agreement and could also trigger indemnification obligations to our clients or under other contractual provisions. Any claim that we have misappropriated the intellectual property of others, whether or not valid, could have a material adverse effect on our business, financial condition and results of operations.

Laws and regulations regarding the handling of client confidential data and information may have a negative impact on our business.

Certain aspects of our business rely on the processing of our clients’ confidential data in a number of jurisdictions and the movement of data across borders. Legal requirements relating to the collection, storage, handling, use, disclosure, transfer and security of this information continue to evolve, and regulatory scrutiny in this area is increasing. Significant uncertainty exists as privacy and data protection laws may be interpreted and applied differently in different jurisdictions and may create inconsistent or conflicting requirements. Although we have procedures and systems in place to address applicable legal and regulatory requirements for those aspects of our business impacted by these laws, enforcement actions and investigations by regulatory authorities related to data security incidents and privacy violations continue to increase, and we could be subject to such activity. The enactment of more restrictive laws, rules, regulations or future enforcement actions or investigations could increase costs or restrictions on certain of our businesses, and noncompliance with existing or future laws could have a material adverse effect on our business, financial condition and results of operations.

A failure in or breach of our networks or systems, including as a result of cyber-attacks, could have a material adverse effect on our business.

Our cybersecurity and processing systems, as well as those of our third-party service providers, newly acquired companies that have not yet been integrated and those of our clients which we periodically manage may experience damage or disruption from a number of causes, including power outages, computer and telecommunication failures, internal design, manual or usage errors, workplace violence or wrongdoing, catastrophic events, natural disasters and severe weather conditions. These systems may also be damaged, disrupted or fail entirely as a result of computer viruses or other malicious codes, social-engineering schemes, unauthorized access attempts and cyber-attacks that include phishing-attacks, denial-of-service attacks, ransomware, malware and hacking. While our systems and those of third parties with whom we do business have been, and will likely continue to be, subject to these types of malicious attacks, to our knowledge, to date there has not been a material breach of our systems and no attack on our systems has had a direct, material impact on us or our business. We cannot, however, predict the extent and severity of any future attacks that may occur.

Any of these numerous and evolving cybersecurity threats, particularly on internet applications, could compromise the confidentiality, availability and integrity of data in our systems or that on the systems of our clients which we are periodically responsible for managing. We believe our possession of confidential client information may put us at a greater risk of being targeted. In addition, we manage and operate supervisory control and data acquisition systems at a number of operations and maintenance, or O&M, client facilities, including water and biogas facilities, and a cyber-attack or other system failure could cause the facility to be shutdown, which could create regulatory compliance issues, cause a contamination event or have other adverse consequences for which we could have liability. The security measures and procedures we, our clients and third-party service providers have in place to protect sensitive data and other information may not be successful or sufficient to counter all data breaches, cyber-attacks or system failures. Although we devote what we believe to be appropriate resources to our cybersecurity programs and have implemented security measures to protect our systems and data, and to prevent, detect and respond to data security incidents, there can be no assurance that our efforts will prevent these threats.

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Because the techniques used to obtain unauthorized access, or to disable or degrade systems change frequently, have become increasingly more complex and sophisticated, and may be difficult to detect for periods of time, we may not anticipate these acts or respond adequately or timely. As these threats continue to evolve and increase, we may be required to devote significant additional resources in order to modify and enhance our security controls and to identify and remediate any security vulnerabilities.

We own an aircraft used to transport employees to project sites which could expose us to risks associated with air travel and aircraft ownership and maintenance.

Through our acquisition of CTEH, we acquired an airplane that we use for transportation of employees. There are inherent risks associated with air travel, including aviation accidents due to weather, technical malfunctions or human error. While we will strive to comply with all safety regulations and ensure the aircraft undergoes necessary and adequate maintenance, accidents or incidents may occur while the aircraft is transporting employees. An accident or incident involving our aircraft could result in significant claims of injured employees and others, as well as repair or replacement of the damaged aircraft and its consequential loss from service. In the event of an accident, our liability insurance may not be adequate to offset our exposure to potential claims and we may be forced to bear losses from the accident. Additionally, the success of the CTEH business depends on its employees, and an aviation accident or incident that results in the serious injury or death of those employees could have a material adverse effect on the business.

Our global operations subject us to additional risks that could adversely affect our business.

We have activities outside of the United States. Our operations, as well as those of our clients, are therefore subject to regulatory, economic, political and other events and uncertainties in countries where these operations are located. Further, our growth strategy includes expansion into additional international markets. In addition to the risks discussed elsewhere herein that are common to both our domestic and international operations, we face risks specific to our foreign activities, including but not limited to:

Foreign operations bring increased complexity and the costs of managing or overseeing foreign operations, including adapting and localizing services or systems to specific regions and countries, can be material. Further, international operations carry inherent uncertainties regarding the effect of local or domestic

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actions, such as the unpredictable impact of the referendum vote in the United Kingdom to leave the European Union (Brexit) and the uncertainty regarding when it will exit and on what terms, any of which could be material. These and other risks related to our foreign operations, or the associated costs or liabilities, could have a material adverse effect on our business, financial condition and results of operations.

Product offerings subject us to risks that could adversely affect our business.

Certain of our environmental solutions include product offerings, including those offered by our recent acquisition, ECT2. We have a limited history in offering products as compared to services, and this expansion subjects us to new and different risks generally associated with offering products manufactured by third parties, including but not limited to:

Under any of these circumstances, demand may suffer, we may incur substantial expense to remedy the problem and may be required to obtain replacement products. If we fail to remedy any such problem in a timely manner, we risk the loss of revenue resulting from the inability to sell those products and related increased costs. If product defects or other issues are not discovered until after such products are purchased by our clients, our clients could lose confidence in our products and our brand and reputation may be negatively impacted. Any failure to successfully respond to the foregoing risks or any others that we may not appreciate as a result of our limited history of production could have material adverse effect on our business, financial condition and results of operations.

Our operations are subject to environmental laws and regulations and any liabilities may have a material adverse effect on our business.

We are in regular contact with waste, biogas, chemicals and other hazardous materials in the ordinary course of providing services to our clients. We also operate a number of O&M client sites. As a result, our business is subject to numerous U.S. and international laws and regulations relating to the protection of the environment. For example, we must comply with a number of U.S. federal and state laws that strictly regulate the handling, removal, treatment, transportation and disposal of toxic and hazardous substances. As an operator of

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client O&M facilities, if there is a spill of a hazardous substance or other contamination event at one of these sites, under the Comprehensive Environmental Response Compensation and Liability Act of 1980, as amended, or CERCLA, and comparable state, provincial and local laws, we may be required to investigate, mitigate and remediate any contamination, including addressing natural resource damage, compensating for human exposure or property damage and installing costly pollution control equipment. CERCLA and comparable state, provincial and local laws typically impose strict, joint and several liabilities without regard to whether an entity knew of or caused the release of hazardous substances. Other environmental laws affecting our business include, but are not limited to, the Federal Water Pollution Control Act of 1972, as amended, also known as the Clean Water Act, Resource Conversation and Recovery Act, National Environmental Policy Act, the Clean Air Act, the Occupational Safety and Health Act, the Federal Mine Safety and Health Act of 1977, the Toxic Substances Control Act and the Superfund Amendments and Reauthorization Act. Our business operations may also be subject to similar international laws relating to environmental protection. Liabilities related to contamination or violations of these laws and regulations could result in material costs to us, including clean-up costs, fines, civil or criminal sanctions and third-party claims for property damage or personal injury, any of which could have a material adverse effect on our business, financial condition and results of operations.

Legal and regulatory claims and proceedings could have a material adverse effect on us.

We and our clients are subject to claims, litigation and regulatory proceedings in the normal course of business and could become subject to additional claims in the future, some of which could be material. In addition to those claims discussed in greater detail elsewhere in the section entitled “—Risks Related to Our Business and Industry,” we have been, and may in the future be, subject to claims involving labor and employment, anti-discrimination, commercial disputes and other matters. We may also be exposed to potential claims arising from the conduct of our employees for which we may be liable. In addition, in the normal course of our business, we are required to make professional judgments and recommendations about environmental conditions of project sites for our clients, and we may be subject to claims that we are responsible for these judgments and recommendations if they are later found to be inaccurate.

Claims and proceedings, whether or not they have merit and regardless of the outcome, are typically expensive and can divert the attention of management and other personnel and require the commitment of significant resources for extended periods of time. Additionally, claims and proceedings can impact client confidence and the general public’s perception of our company and services and solutions, even if the underlying assertions are proven to be false. The outcomes of litigation and similar disputes are often difficult to reliably predict and may result in decisions or settlements that are contrary to or in excess of our expectations and losses may exceed our reserves. Any claims or proceedings, particularly those in which we are unsuccessful or for which we did not establish adequate reserves, could have a material adverse effect on our business, financial condition and results of operations.

If our research and development activities are unsuccessful, our business could be harmed.

The success of our research and development activity is highly uncertain. Research and development efforts can require substantial technical, financial and human resources. We may focus our efforts and resources on potential technologies that ultimately prove to be unsuccessful and technologies that first appear promising may be delayed or fail to reach later stages of development. Decisions regarding the further advancement must sometimes be made with limited and incomplete data, which makes it difficult to ensure or even accurately predict the outcomes. Because we have limited resources, we may forego pursuing one opportunity that later is proven to have greater commercial potential. Even if our efforts do yield new technologies, we may not be able to convert those technologies into commercially viable offerings in the long term. If our research and development activities are unsuccessful, our technologies and offerings may not keep pace with the market, and we may lose clients and one or more competitive advantages, any of which could have a material adverse effect on our business, financial condition and results of operations.

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Failure to comply with anti-corruption and similar laws could subject us to penalties and other adverse consequences.

We are required to comply with the U.S. Foreign Corrupt Practices Act, or FCPA, and similar laws in other countries that prohibit improper payments or offers of payment to foreign officials and political parties for the purpose of obtaining or retaining business as well as require companies to maintain accurate books and records. Bribery, corruption and trade laws and regulations, and the enforcement thereof, are increasing in frequency, complexity and severity on a global basis. In many foreign countries it may be a local custom that businesses operating in such countries engage in practices that are prohibited by the FCPA or other similar laws and regulations. Although we have implemented policies and procedures requiring our employees, consultants and other third parties with whom we do business to comply with the FCPA and similar laws and regulations, we have limited experience in these areas and there can be no assurance that our policies will be adequate or prevent and deter violations of these types of laws. If our employees, consultants or other third parties with whom we do business do violate these laws or our policies, we may be ultimately held responsible, and any violation could result in severe criminal or civil sanctions, fines and penalties and suspension or debarment from U.S. government contracting, any of which could have a material and adverse effect on our business, financial condition and results of operations.

We are subject to taxation in multiple jurisdictions. Any adverse development in the tax laws of any of these jurisdictions, any disagreement with our tax positions or any changes in effective tax rates could have a material adverse effect on our business, financial condition or results of operations.

We are subject to taxation in, and to the tax laws and regulations of, multiple jurisdictions, including non-U.S. jurisdictions as a result of the expansion of our international operations and our corporate entity structure. We are also subject to transfer pricing laws with respect to our intercompany transactions. Adverse developments in tax laws or regulations, or any change in position regarding the application, administration or interpretation thereof, in any applicable jurisdiction, could have a material adverse effect on our business, financial condition or results of operations. In addition, the tax authorities in any applicable jurisdiction may disagree with the positions we have taken or intend to take regarding the tax treatment or characterization of any of our transactions. If any applicable tax authorities were to successfully challenge the tax treatment or characterization of any of our transactions, it could have a material adverse effect on our business, financial condition or results of operations.

In addition, our tax obligations and effective tax rates could be adversely affected by recognizing tax losses or lower than anticipated earnings in jurisdictions where we have lower statutory rates and higher than anticipated earnings in jurisdictions where we have higher statutory rates, varying tax rates in the different jurisdictions in which we operate, changes in foreign currency exchange rates or changes in the valuation of our deferred tax assets and liabilities.

Insufficient insurance coverage could have a material adverse effect on us.

We maintain property, business interruption, counterparty and liability insurance coverage that we believe is consistent with industry practice. However, our insurance program does not cover, or may not adequately cover, every potential risk associated with our business and the consequences thereof. In addition, market conditions or any significant claim or a number of claims made by or against us could cause our premiums and deductibles to increase substantially and, in some instances, our coverage may be reduced or become entirely unavailable. In the future, we may not be able to obtain meaningful coverage at reasonable rates for a variety of risks. If our insurance coverage is insufficient, if we are not able to obtain sufficient coverage in the future, or if we are exposed to significant losses as a result of any risks for which we may self-insure, any resulting costs or liabilities could have a material adverse effect on our business, financial condition and results of operations.

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Seasonality of demand for certain of our services and weather conditions and other factors outside our control may adversely affect, or cause volatility in, our financial results.

We experience seasonal demand with respect to certain of the services we provide, as demand for those services can follow weather trends. Seasonal effects may vary from year to year and are impacted by weather patterns, particularly by temperatures, rainfall and droughts. In addition, we may experience earnings volatility as a result of the timing of large contract wins and the timing of large emergency response projects following an incident or natural disaster due to the unpredictable nature thereof. Our business, financial condition and results of operations could be materially and adversely affected by severe weather, natural disasters or environmental factors. Furthermore, our ability to deliver services on time to our clients can be significantly impeded by such conditions and events.

Our business could be disrupted by catastrophic events.

Occurrence of any catastrophic event, including earthquake, fire, flood, tsunami or other weather event, power loss, telecommunications failure, software or hardware malfunctions, cyber-attack, war or terrorist attack, could result in lengthy interruptions in our services. Our insurance coverage may not compensate us for losses that may occur in the wake of such events. In addition, acts of terrorism could cause disruptions to the internet or the economy as a whole. Even with our disaster recovery arrangements, our services could be interrupted. If our systems were to fail or be negatively impacted as a result of a natural disaster or other event, our ability to deliver services to our clients would be impaired or we could lose critical data. If we are unable to develop or, in the event of a disaster or emergency, successfully execute on, adequate plans to ensure that our business functions continue to operate during and after a disaster, our business, results of operations, financial condition and reputation would be harmed.

We cannot assure you that any unaudited financial data related to our acquisitions presented herein would not be materially different if audited or reviewed.

Many of the businesses that we have acquired and will acquire have unaudited financial statements that have been prepared by the management of such companies and have not been independently reviewed or audited. Certain of our acquisitions were divisions or operating units and had no separately prepared financial statements at all, instead relying on more limited financial information. We present some unaudited financial information in this prospectus for certain acquisitions that is derived from such unaudited financial statements or financial information prepared by the management of such acquired businesses. We cannot assure you that the financial statements and other financial information of companies we have acquired or will acquire would not be materially different if such businesses were independently reviewed or audited. In addition, our results of operations from these acquisitions could, in the future, result in impairment charges for any of our intangible assets, including goodwill, or other long-lived assets, particularly if economic conditions worsen unexpectedly. These changes could materially negatively affect our business, financial condition and results of operations.

Risks Related to Our Indebtedness

Our current indebtedness, and any future indebtedness we may incur, may limit our operational and financing flexibility and negatively impact our business.

On April 13, 2020, the Company entered into a Unitranche Credit Agreement providing for a new $225.0 million credit facility comprised of a $175.0 million term loan and $50.0 million revolving credit facility. As of July 13, 2020, the aggregate principal amount of our debt under the credit facility was approximately $175.0 million, all of which was outstanding under the term loan. Additionally, we may borrow additional funds under this credit facility and increase the borrowing capacity of the term loan thereunder by up to $100.0 million, each as described in greater detail in the section entitled “Description of Certain Indebtedness,” or enter into new borrowing arrangements. We also may incur significant indebtedness in the future to continue to support our organic and acquisition-related growth.

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Our existing and any future indebtedness could have important consequences, including:

Our ability to make payments on debt, to repay existing or future indebtedness when due, to fund operations and significant planned capital expenditures and to support our acquisition strategy will depend on our ability to generate cash in the future. Our ability to produce cash from operations is, and will be, subject to a number of risks, including those described in the section entitled “Risk Factors—Risks Related to Our Business and Industry” and elsewhere in this prospectus. Our financial condition, including our ability to make payments on our debt, is also subject to external factors such as interest rates, the level of lending activity in the credit markets and other external industry-specific and more general external factors, including those described in the section entitled “Risk Factors—Risks Related to Our Business and Industry” and elsewhere in this prospectus.

We may not be able to borrow additional financing or to refinance our credit facility or other indebtedness we may incur in the future, if required, on commercially reasonable terms, if at all. In addition, our ability to borrow under our credit facility is subject to significant conditions, as described in the section entitled “Description of Certain Indebtedness.”

Despite our current level of indebtedness, we may incur more debt.

We may be able to incur significant additional indebtedness in the future. For example, we may incur additional indebtedness in connection with future acquisitions. Although our credit facility and our outstanding preferred stock contain restrictions on the incurrence of additional indebtedness, these restrictions are subject to a number of qualifications and exceptions, and the additional indebtedness incurred in compliance with these restrictions could be substantial. These restrictions also do not prevent us from incurring obligations that do not constitute indebtedness. Further, as of July 13, 2020, our credit facility provided for an aggregate unused commitment of $50.0 million (without giving effect to any outstanding letters of credit, and subject to borrowing base limitations). The credit facility also allows us to increase the aggregate borrowings thereunder by up to $100.0 million. See the section entitled “Description of Certain Indebtedness.”

We may not be able to generate sufficient cash to service all of our indebtedness and may be forced to take other actions to satisfy our obligations under our indebtedness, which may not be successful.

Our ability to make scheduled payments on, or to refinance our respective obligations under, our indebtedness, and to fund planned capital expenditures, future acquisitions and other corporate expenses will

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depend on our future operating performance and on economic, financial, competitive, legislative, regulatory and other factors and any legal and regulatory restrictions on the payment of distributions and dividends to which we may be subject. Many of these factors are beyond our control. We cannot assure you that our business will generate sufficient cash flow from operations, that currently anticipated cost savings and operating improvements will be realized or that future borrowings will be available to us in an amount sufficient to enable us to satisfy our obligations under our indebtedness or to fund our other needs. In order for us to satisfy our obligations under our indebtedness and fund planned capital expenditures and future acquisitions, we must continue to execute on our business strategy. If we are unable to do so, we may need to reduce or delay our planned capital expenditures or execution of our acquisition strategy, seek additional capital, sell assets or refinance all or a portion of our indebtedness on or before maturity, any of which could materially and adversely affect our future revenue prospects.

Our ability to restructure or refinance our indebtedness will depend on the condition of the capital markets and our financial condition at such time. Any refinancing of our existing or future debt could be at higher interest rates and may require us to comply with more onerous covenants, which could further restrict our business operations. Our credit facility and our outstanding preferred stock restrict our ability to consummate or use the proceeds from asset sales. We may not be able to consummate those asset sales to raise capital or sell assets at prices that we believe are fair. Any proceeds that we receive may not be adequate to meet any debt service obligations then due. In addition, any failure to make payments of interest and principal on our outstanding indebtedness on a timely basis would likely result in a reduction of our credit rating, which could harm our ability to incur additional indebtedness. See the section entitled “Description of Certain Indebtedness.”

Our credit facility restricts our ability to engage in some business and financial transactions.

Our credit facility contains a number of covenants that among other things, limit our ability to:

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In addition, our credit facility contains certain financial covenants that, among other things, require us not to exceed specified total debt leverage ratios and to maintain a fixed charge coverage ratio. Among other things, we may not be able to borrow money under our credit facility if we are unable to comply with the financial and other covenants included therein. Our credit facility also contains certain customary representations and warranties, affirmative covenants and events of default (including, among other things, an event of default upon a change of control). If an event of default occurs, our lenders will be entitled to take various actions, including the acceleration of amounts due under our credit facility and all actions permitted to be taken by a secured creditor.

Any future debt that we incur may contain additional and more restrictive negative covenants and financial maintenance covenants. These restrictions could limit our ability to obtain debt financing, repurchase stock, pay dividends, refinance or pay principal on our outstanding debt, complete acquisitions for cash or debt or react to changes in our operating environment or the economy.

Our failure to comply with obligations under our credit facility or the agreements governing any future indebtedness may result in an event of default under the applicable agreement. A default, if not cured or waived, may permit acceleration of some or all of our other indebtedness and trigger other termination and similar rights under other contracts. We cannot be certain that we will be able to remedy any defaults and, if our indebtedness is accelerated, we cannot be certain that we will have sufficient funds available to pay the accelerated indebtedness or that we will have the ability to refinance the accelerated indebtedness on terms favorable to us or at all, any of which could have a material adverse effect on our business, financial condition and results of operations.

See the section entitled “Description of Certain Indebtedness.”

Risks Related to the Offering and Ownership of Our Common Stock

There is currently no public market for shares of our common stock and an active trading market for our common stock may never develop or be sustained following this offering.

Prior to this offering, there has been no market for shares of our common stock. Although we have applied to list our common stock on the New York Stock Exchange, or the NYSE, under the symbol “MEG,” an active trading market for our common stock may never develop or, if one develops, it may not be sustained following this offering. Accordingly, no assurance can be given as to the following:

If an active market for our common stock with meaningful trading volume does not develop or is not maintained, the market price of our common stock may decline materially below the offering price and you may not be able to sell your shares. The initial public offering price for our shares will be determined by negotiations between us and representatives of the underwriters and may not be indicative of prices that will prevail in the open market following this offering. Consequently, you may not be able to sell our common stock at prices equal to or greater than the price you paid in this offering.

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The trading price of our common stock may be volatile and could decline substantially following this offering.

The market price of our common stock following this offering may be highly volatile and subject to wide fluctuations. Some of the factors that could negatively affect the market price of our common stock or result in significant fluctuations in price, regardless of our actual operating performance, include:

Furthermore, in recent years, the stock market has experienced significant price and volume fluctuations. This volatility has had a significant impact on the market price of securities issued by many companies, including companies in our industry, and often occurs without regard to the operating performance of the affected companies. Therefore, factors that have little or nothing to do with us could cause the price of our common stock to fluctuate, and these fluctuations or any fluctuations related to our company could cause the market price of our common stock to decline materially below the public offering price.

The coverage of our business or our common stock by securities or industry analysts or the absence thereof could adversely affect our stock price and trading volume.

The trading market for our common stock will be influenced in part by the research and other reports that industry or securities analysts may publish about us or our business or industry. We do not currently have, and may never obtain, research coverage by industry or financial analysts. If no or few analysts commence coverage of us, the trading price and volume of our stock would likely be negatively impacted. If analysts do cover us and one or more of them downgrade our stock, or if they issue other unfavorable commentary about us or our industry or inaccurate research, our stock price would likely decline. Furthermore, if one or more of these analysts cease coverage or fail to regularly publish reports on us, we could lose visibility in the financial markets. Any of the foregoing would likely cause our stock price and trading volume to decline.

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We are an emerging growth company, and any decision on our part to comply with certain reduced reporting and disclosure requirements applicable to emerging growth companies could make our common stock less attractive to investors.

We are an emerging growth company, and, for as long as we continue to be an emerging growth company, we currently intend to take advantage of exemptions from various reporting requirements applicable to other public companies but not to emerging growth companies, including, but not limited to, not being required to have our independent registered public accounting firm audit our internal control over financial reporting under Section 404 of the Sarbanes-Oxley Act, reduced disclosure obligations regarding executive compensation in our registration statements, periodic reports and proxy statements, the inclusion of only two years of audited financial statements in this prospectus and exemptions from the requirements of holding a nonbinding advisory vote on executive compensation and stockholder approval of any golden parachute payments not previously approved. Under the JOBS Act, emerging growth companies can also delay adopting new or revised accounting standards until such time as those standards apply to private companies. We have chosen to “opt in” to this extended transition period for complying with new or revised accounting standards and, as a result, we will not be subject to the same new or revised accounting standards as other public companies that comply with such new or revised standards on a non-delayed basis. We will cease to be an emerging growth company upon the earliest of: (i) the end of the fiscal year following the fifth anniversary of this offering; (ii) the last day of the fiscal year during which our total annual gross revenues are $1.07 billion or more; (iii) the date on which we have, during the previous three-year period, issued more than $1.0 billion in non-convertible debt securities; or (iv) the end of any fiscal year in which the market value of our common stock held by non-affiliates exceeded $700.0 million as of the end of the second quarter of that fiscal year. We cannot predict if investors will find our common stock less attractive if we choose to rely on these exemptions. If some investors find our common stock less attractive as a result of any choices to reduce future disclosure, there may be a less active trading market for our common stock and the price of our common stock may be more volatile.

Our internal control over financial reporting may not be effective and our independent registered public accounting firm may not be able to certify as to their effectiveness, which could have a significant and adverse effect on our business and reputation.

As a public company, we will be required to comply with the SEC’s rules implementing Sections 302 and 404 of the Sarbanes-Oxley Act, which require management to certify financial and other information in our quarterly and annual reports and provide an annual management report on the effectiveness of internal control over financial reporting. As an emerging growth company, our independent registered public accounting firm will not be required to formally attest to the effectiveness of our internal control over financial reporting pursuant to Section 404 until the date we are no longer an emerging growth company. At such time, our independent registered public accounting firm may issue a report that is adverse in the event that it is not satisfied with the level at which our controls are documented, designed or operating.

To comply with the requirements of being a public company, we may need to undertake various actions, such as implementing additional internal controls and procedures and hiring additional accounting or internal audit staff. Testing and maintaining internal controls can divert our management’s attention from other matters that are important to the operation of our business. If we identify material weaknesses in our internal control over financial reporting or are unable to comply with the requirements of Section 404 or assert that our internal control over financial reporting are effective, or if our independent registered public accounting firm is unable to express an opinion as to the effectiveness of our internal control over financial reporting, investors may lose confidence in the accuracy and completeness of our financial reports and the market price of our common stock could be negatively affected, and we could become subject to investigations by the SEC or other regulatory authorities, which could require additional financial and management resources.

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Our significant stockholders may have conflicts of interest with other stockholders and may limit your ability to influence corporate matters.

Following completion of this offering, Messrs. Richard E. Perlman and James K. Price, two of our directors, will beneficially own approximately 9.4% and 7.2%, respectively, of our outstanding shares of common stock (or 8.8% and 6.7%, respectively, if the underwriters exercise their option to purchase additional shares in full). See the section entitled “Principal Stockholders” for more information on the beneficial ownership of our common stock. As a result of their respective ownership, Messrs. Perlman and Price will have sufficient voting power to significantly influence all matters submitted to our stockholders for approval, including director elections and proposed amendments to our bylaws or certificate of incorporation. In addition, this concentration of ownership may delay or prevent a merger, consolidation or other business combination or change in control of our company and make some transactions that might otherwise give you the opportunity to realize a premium over the then-prevailing market price of our common stock more difficult without their support. After the lock-up period discussed in the section entitled “Underwriting” expires, Messrs. Perlman and Price will be able to transfer significant voting blocks of our common stock to a third-party by transferring their common stock, which would not require the approval of our board of directors or other stockholders. The interests of Messrs. Perlman and Price may not always coincide with our interests as a company or the interests of other stockholders. This concentration of ownership may also adversely affect our share price.

Additionally, immediately after this offering, we expect one or more affiliates of Oaktree Capital Management, L.P., or Oaktree, will beneficially own approximately 15.9% (or 14.9% if the underwriters exercise in full their option to purchase additional shares) of our outstanding common stock. See the section entitled “Principal Stockholders” for more information on the beneficial ownership of our common stock. Notwithstanding this stock ownership and that, following completion of this offering, one member of our board of directors will be a representative of Oaktree, Oaktree is in the business of making investments in companies and may from time to time acquire and hold interests in businesses that compete directly or indirectly with us. Oaktree may also pursue acquisition opportunities that may be complementary to our business, and as a result, those acquisition opportunities may not be available to us. In recognition that representatives of Oaktree and its affiliated entities and funds may serve as members of our board of directors, our amended and restated certificate of incorporation that will be in effect upon consummation of this offering provides, among other things, that none of Oaktree, its affiliates or any of its representatives (including a representative who may serve on our board of directors) has any duty to refrain from engaging directly or indirectly in the same or similar business activities or lines of business that we do. In the event that any of these persons or entities acquires knowledge of a potential transaction or matter which may be a corporate opportunity for itself and us, we will not have any expectancy in such corporate opportunity, and these persons and entities will not have any duty to communicate or offer such corporate opportunity to us and may pursue or acquire such corporate opportunity for themselves or direct such opportunity to another person. Affiliates of Oaktree who are holders of our common stock will also retain a right of first offer with respect to their respective pro rata portion of any new securities we may issue following completion of this offering, excluding any shares to be issued by us in certain specified circumstances. These potential conflicts of interest could have a material adverse effect on our business, financial condition and results of operations if, among other things, attractive corporate opportunities are allocated by Oaktree to itself or one of its other affiliates. See the sections entitled “Certain Relationships and Related Party Transactions—Investor Rights Agreement” and “Description of Capital Stock—Corporate Opportunities.”

Future sales of our common stock in the public market could cause our stock price to fall.

Following completion of this offering, Messrs. Richard E. Perlman and James K. Price, two of our directors, will beneficially own 1,909,036 shares and 1,458,505 shares, respectively, or approximately 9.4% and 7.2%, respectively, of our outstanding shares of common stock (8.8% and 6.7%, respectively, if the underwriters exercise their option to purchase additional shares in full). We, our executive officers, directors and substantially all of our other existing security holders have entered into or will enter into lock-up agreements with the underwriters that will, subject to certain exceptions, restrict the sale of shares of our common stock held by them

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for 180 days following the date of this prospectus. The underwriters may, without notice except in certain limited circumstances, release all or any portion of the shares of common stock subject to lock-up agreements. See the section entitled “Underwriting” for a description of these lock-up agreements. The market price of our common stock may decline materially when these restrictions on resale by our other affiliates lapse or if they are waived.

Upon the expiration of the lock-up agreements, all shares held by our affiliates will be eligible for resale in the public market, subject to applicable securities laws, including the Securities Act. Therefore, unless shares owned by any of our affiliates are registered under the Securities Act, these shares may only be resold into the public markets in accordance with the requirements of an exemption from registration or safe harbor, including Rule 144 and the volume limitations, manner of sale requirements and notice requirements thereof. See the section entitled “Shares Eligible for Future Sale.” However, pursuant to the terms of an Investor Rights Agreement, Messrs. Perlman and Price, OCM Montrose Holdings, L.P., OCM Montrose II Holdings, L.P., or, together with OCM Montrose Holdings, L.P., the Oaktree Holder, and certain stockholders will have the right to demand that we register its shares under the Securities Act as well as the right to include their shares in any registration statement that we file with the SEC, subject to certain exceptions. See the section entitled “Shares Eligible for Future Sale.” Any registration of these or other shares would enable those shares to be sold in the public market, subject to certain restrictions in the Investor Rights Agreement and the restrictions under the lock-up agreements referred to above. Any sale by Messrs. Perlman and Price, the Oaktree Holder or other affiliates or any perception in the public markets that such a transaction may occur could cause the market price of our common stock to decline materially.

Following this offering, we intend to file a registration statement on Form S-8 under the Securities Act registering shares under our stock incentive plan. Subject to the terms of the awards pursuant to which these shares may be granted and except for shares held by affiliates who will be subject to the resale restrictions described above, the shares issuable pursuant to our stock incentive plan will be available for sale in the public market immediately after the registration statement is filed. See the section entitled “Shares Eligible for Future Sale.”

If you purchase shares of common stock sold in this offering, you will experience immediate and substantial dilution and you may suffer additional dilution in the future.

If you purchase shares our common stock in this offering, the value of your shares based on our actual book value will immediately be less than the price you paid. This reduction in the value of your equity is known as dilution. If you purchase shares in this offering, you will suffer, as of March 31, 2020, immediate dilution of $32.36 per share in the net tangible book value after giving effect to the sale of common stock in this offering, less underwriting discounts and commissions and the estimated expenses payable by us, and the application of the net proceeds as described in the section entitled “Use of Proceeds.” We also expect to grant stock options, restricted stock units and other forms of stock-based compensation to our directors, officers and employees, and may, from time to time, issue equity securities in connection with acquisitions or strategic transactions, and you will experience additional dilution in the future when these equity awards are exercised or vest, as applicable. If we raise funds in the future by issuing additional securities, any newly issued shares or shares issued upon conversion or exercise of such securities will further dilute your ownership. You will also experience dilution upon any conversion of our shares of Series A-2 preferred stock into shares of common stock at a discount, or upon the exercise of outstanding warrants to purchase shares of our common stock. See the sections entitled “Description of Capital Stock — Preferred Stock” and “Description of Capital Stock—Warrants.”

We have no present intention to pay dividends on our common stock.

We have no present intention to pay dividends on our common stock. Any determination to pay dividends to holders of our common stock will be at the discretion of our board of directors and will depend upon many factors, including our financial condition, results of operations, projections, liquidity, earnings, legal requirements, restrictions in our credit facility, the terms of our Series A-2 preferred stock, agreements governing any other indebtedness we may enter into and other factors that our board of directors deems relevant. See the section entitled “Dividend Policy.” Accordingly, you may need to sell your shares of our common stock to realize a return on your investment, and you may not be able to sell your shares at or above the price you paid for them.

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Our ability to raise capital in the future may be limited. We may not be able to secure additional financing on terms that are acceptable to us, or at all.

In order for us to grow and successfully execute our business plan, we will require additional financing. Additionally, our business and operations may consume resources faster than we anticipate. Therefore, in the future, we expect we will raise additional funds through various financings that may include the issuance of new equity securities, debt or a combination of both. However, the lapse or waiver of the lock-up restrictions discussed above or any sale or perception of a possible sale by the Oaktree Holder or our other affiliates, and any related decline in the market price of our common stock, could impair our ability to raise capital.

Further, additional financing, whether debt or equity, may not be available on favorable terms, or at all. If adequate funds are not available on acceptable terms, we may be unable to fund our capital requirements. If we issue new debt securities, the debt holders would have rights senior to common stockholders to make claims on our assets, and the terms of any debt could restrict our operations, including our ability to pay dividends on our common stock. If we issue additional equity securities, existing stockholders will experience dilution, and the new equity securities could have rights senior to those of our common stock. Because our decision to issue securities in any future offering will depend on market conditions and other factors beyond our control, we cannot predict or estimate the amount, timing or nature of our future offerings. Thus, our stockholders bear the risk of our future securities offerings reducing the market price of our common stock and diluting their interest.

Provisions of our amended and restated governing documents, Delaware law and other documents could discourage, delay or prevent a merger or acquisition at a premium price.

Provisions in our amended and restated certificate of incorporation and amended and restated bylaws that we intend to adopt prior to the consummation of this offering may have the effect of delaying or preventing a change of control or changes in our management. For example, our amended and restated certificate of incorporation and amended and restated bylaws will include provisions that:

These provisions may discourage, delay or prevent a merger or acquisition of our company, including a transaction in which the acquirer may offer a premium price for our common stock.

We are also subject to Section 203 of the Delaware General Corporation Law, or the DGCL, which, subject to certain exceptions, prohibits us from engaging in any business combination with any interested stockholder, as defined in that section, for a period of three years following the date on which that stockholder became an interested stockholder. In addition, our equity incentive plan will permit accelerated vesting of stock

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options and restricted stock, and payments to be made to the employees thereunder in certain circumstances, in connection with a change of control of our company, which could discourage, delay or prevent a merger or acquisition at a premium price. In addition, our credit facility includes, and other debt instruments we may enter into in the future may include, provisions entitling the lenders to demand immediate repayment of all borrowings upon the occurrence of certain change of control events relating to our company, which also could discourage, delay or prevent a business combination transaction. See “Description of Capital Stock—Provisions of Our Certificate of Incorporation and Bylaws to be Adopted and Delaware Law That May Have an Anti-Takeover Effect.”

Our amended and restated certificate of incorporation will include an exclusive forum clause, which could limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us.

Our amended and restated certificate of incorporation, to be in effect immediately prior to the completion of this offering, will provide that, unless we consent in writing to the selection of an alternative forum, the sole and exclusive forum for any stockholder (including any beneficial owner) to bring (i) any derivative action or proceeding brought on our behalf, (ii) any action asserting a claim of breach of a fiduciary duty owed by any of our directors, officers or employees to us or to our stockholders, (iii) any action asserting a claim arising pursuant to any provision of the DGCL or our certificate of incorporation or bylaws or (iv) any action asserting a claim governed by the internal affairs doctrine, will be a state court located within the State of Delaware (or, if no state court located within the State of Delaware has jurisdiction or declines to accept jurisdiction, the federal district court for the District of Delaware); in all cases subject to such court having personal jurisdiction over the indispensable parties named as defendants.

In addition, our amended and restated certificate of incorporation will provide that the federal district courts of the United States will be the exclusive forum for resolving any complaint asserting a cause of action arising under the Securities Act but that the forum selection provision will not apply to claims brought to enforce a duty or liability created by the Exchange Act. Although we believe these provisions benefit us by providing increased consistency in the application of Delaware law for the specified types of actions and proceedings, the provisions may have the effect of discouraging lawsuits against us or our directors and officers. Alternatively, if a court were to find the choice of forum provision contained in our amended and restated certificate of incorporation and amended and restated bylaws to be inapplicable or unenforceable in an action, we may incur additional costs associated with resolving such action in other jurisdictions, which could harm our business, financial condition, and results of operations.

Any person or entity purchasing or otherwise acquiring any interest in shares of our capital stock is deemed to have notice of and consented to the foregoing provisions. The exclusive forum clause may limit our stockholders’ ability to obtain a favorable judicial forum for disputes with us. See the section entitled “Description of Capital Stock—Exclusive Forum Clause.”

We will incur increased costs and obligations as a result of being a publicly-traded company.

As a company with publicly-traded securities, we will be subject to the requirements of the Securities Exchange Act of 1934, as amended, or the Exchange Act, the Sarbanes-Oxley Act, the Dodd-Frank Wall Street Reform and Consumer Protection Act, the listing requirements of the NYSE and other applicable securities rules and regulations. These rules and regulations require that we adopt additional controls and procedures and disclosure, corporate governance and other practices thereby significantly increasing our legal, financial and other compliance costs. These new obligations will also make other aspects of our business more difficult, time-consuming or costly and increase demand on our personnel, systems and other resources. For example, to maintain and improve the effectiveness of our disclosure controls and procedures and internal control over financial reporting, we will need to commit significant resources, hire additional staff and provide additional management oversight. Furthermore, as a result of disclosure of information in this prospectus and in our Exchange Act and other filings required of a public company, our business and financial condition will become

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more visible, which we believe may give some of our competitors who may not be similarly required to disclose this type of information a competitive advantage. In addition to these added costs and burdens, if we are unable to satisfy our obligations as a public company, we could be subject to delisting of our common stock, fines, sanctions, other regulatory actions and civil litigation, any of which could negatively affect the price of our common stock.

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FORWARD-LOOKING STATEMENTS

This prospectus contains “forward-looking statements.” These forward-looking statements are included throughout this prospectus, including in the sections entitled “Prospectus Summary,” “Risk Factors,” “Use of Proceeds,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Business” and “Certain Relationships and Related Party Transactions,” and relate to matters such as our industry, business strategy, goals and expectations concerning our market position, future operations, margins, profitability, capital expenditures, liquidity, capital resources and other financial and operating information. We have used the words “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “could,” “estimate,” “expect,” “future,” “intend,” “may,” “plan,” “position,” “potential,” “predict,” “project,” “seek,” “should,” “target,” “will” and similar terms and phrases to identify forward-looking statements in this prospectus. All of our forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially from those that we are expecting, including:

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The forward-looking statements contained in this prospectus are based on historical performance and management’s current plans, estimates and expectations in light of information currently available to us and are subject to uncertainty and changes in circumstances. There can be no assurance that future developments affecting us will be those that we have anticipated. Actual results may differ materially from these expectations due to changes in global, regional or local political, economic, business, competitive, market, regulatory and other factors, many of which are beyond our control, as well as the other factors described in the section entitled “Risk Factors.” Further, many of these factors are, and may continue to be, amplified by the COVID-19 pandemic. Additional factors or events that could cause our actual results to differ may also emerge from time to time, and it is not possible for us to predict all of them. Should one or more of these risks or uncertainties materialize, or should any of our assumptions prove to be incorrect, our actual results may vary in material respects from what we may have expressed or implied by any forward-looking statement and, therefore, you

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should not regard any forward-looking statement as a representation or warranty by us or any other person that we will successfully achieve the expectation, plan or objective expressed in such forward-looking statement in any specified time frame, or at all. We caution that you should not place undue reliance on any of our forward-looking statements. Any forward-looking statement made by us in this prospectus speaks only as of the date on which we make it. We undertake no obligation to publicly update any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by applicable securities laws.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this prospectus, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

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USE OF PROCEEDS

We estimate that our proceeds from this offering will be approximately $148.1 million (or approximately $170.7 million if the underwriters exercise in full their option to purchase additional shares), based on the midpoint of the estimated initial public offering price range set forth on the cover page of this prospectus, after deducting underwriting discounts and commissions and estimated offering expenses payable by us. We intend to use approximately $139.3 million of the net proceeds from this offering in connection with the redemption of all outstanding shares of our Series A-1 preferred stock and the remainder for general corporate purposes, including future investments in innovation and acquisitions in our highly fragmented industry.

Pending use of the net proceeds from this offering described above, we may invest the net proceeds in short-and intermediate-term interest-bearing obligations, investment-grade instruments, certificates of deposit or direct or guaranteed obligations of the United States government.

Each $1.00 increase or decrease in the assumed initial public offering price of $16.00 per share, the midpoint of the estimated initial public offering price range set forth on the cover page of this prospectus, would increase or decrease the net proceeds to us from this offering by approximately $9.4 million, assuming the number of shares offered, as set forth on the cover page of this prospectus, remains the same, and after deducting underwriting discounts and commissions and estimated offering expenses payable by us. Similarly, each increase or decrease of 1.0 million in the number of shares of our common stock offered by us would increase or decrease the net proceeds that we receive from this offering by approximately $15.0 million, assuming the assumed initial public offering price remains the same and after deducting the estimated underwriting discounts and commissions payable by us.

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DIVIDEND POLICY

We have no present intention to pay cash dividends on our common stock. Any determination to pay dividends to holders of our common stock will be at the discretion of our board of directors and will depend upon many factors, including our financial condition, results of operations, projections, liquidity, earnings, legal requirements, restrictions in the agreements governing our existing indebtedness and any other indebtedness we may enter into and other factors that our board of directors deems relevant.

The agreements governing our existing indebtedness and the terms of our outstanding preferred stock contain, and debt instruments that we enter into in the future may contain, covenants that place limitations on the amount of dividends we may pay. Additionally, holders of our Series A-2 preferred stock will be, following completion of this offering, entitled to receive cumulative dividends, accruing daily and compounded quarterly, at a rate of 9% per annum on the then-stated value of each share, whether or not earned or declared by our board of directors, and in preference to the holders of any and all other series or classes of our capital stock, including our common stock. See the sections entitled “Description of Capital Stock” and “Description of Certain Indebtedness.” In addition, under Delaware law, our board of directors may declare dividends only to the extent of our surplus, which is defined as total assets at fair market value minus total liabilities, minus statutory capital, or, if there is no surplus, out of our net profits for the then current and immediately preceding year.

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CAPITALIZATION

The following table sets forth our cash and cash equivalents and capitalization as of March 31, 2020:

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You should read this table together with the information in this prospectus in the sections entitled “Use of Proceeds,” “Selected Historical Consolidated Financial Information,” “Unaudited Pro Forma Financial Information,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Description of Capital Stock” and “Description of Certain Indebtedness” and with the audited consolidated financial statements and the related notes included elsewhere in this prospectus.

Each $1.00 increase or decrease in the assumed initial public offering price of $16.00 per share, the midpoint of the price range set forth on the cover page of this prospectus, would increase or decrease, respectively, the amount of cash, additional paid-in capital, total stockholders’ (deficit) and total capitalization by $9.4 million, assuming the number of shares offered by us, as set forth on the cover page of this prospectus, remains the same, after deducting underwriting discounts and commissions and estimated offering expenses payable by us. We may also increase or decrease the number of shares we are offering. An increase or decrease of 1.0 million in the number of shares we are offering would increase or decrease, respectively, the amount of cash, stockholders’ (deficit) equity and total capitalization by approximately $15.0 million, assuming the

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assumed initial public offering price per share, as set forth on the cover page of this prospectus, remains the same after deducting underwriting discounts and commissions and estimated offering expenses payable by us. The pro forma as adjusted information is illustrative only, and will be adjusted based on the actual initial public offering price and other terms of this offering determined at pricing.

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DILUTION

Dilution represents the difference between the amount per share paid by investors in this offering and the as adjusted net tangible book value per share of our common stock immediately after this offering. The data in this section have been derived from our condensed consolidated balance sheet as of March 31, 2020. Net tangible book value per share is equal to our total tangible assets less the amount of our total liabilities, divided by the sum of the number of our shares of common stock outstanding. Our net tangible book value as of March 31, 2020 was $(161.7) million, or $(19.32) per share of common stock.

After giving effect to (i) the issuance by us of 791,139 shares of our common stock in connection with the acquisition of CTEH; (ii) the issuance and sale by us of 10,000,000 shares of our common stock in this offering at an assumed initial public offering price of $16.00 per share, the midpoint of the price range set forth on the cover page of this prospectus, after deducting estimated underwriting discounts and commissions and other estimated offering expenses payable by us; and (iii) the application of such proceeds as described in the section entitled “Use of Proceeds,” including the payment by us, in shares of common stock, of the maximum portion of the per-share redemption price of our Series A-1 preferred stock in common stock, our net tangible book value, pro forma, as of March 31, 2020 would have been $(333.2) million, or $(16.36) per share of common stock. This represents an immediate increase in net tangible book value to our existing stockholders of $2.96 per share and an immediate dilution to new investors in this offering of $32.36 per share. The following table illustrates this per share dilution:

The information in the preceding table is based on an assumed offering price of $16.00 per share, the midpoint of the estimated initial public offering price range set forth on the cover page of this prospectus. A $1.00 increase or decrease in the assumed initial public offering price per share would increase or decrease, respectively, the pro forma net tangible book value after this offering by approximately $9.4 million and increase or decrease the dilution per share of common stock to new investors in this offering by $0.60 per share, in each case calculated as described above and assuming that the number of shares offered by us, as set forth on the cover page of this prospectus, remains the same. Similarly, each increase or decrease of 1.0 million shares in the number of shares of our common stock offered by us would increase or decrease, as applicable, our pro forma net tangible book value by approximately $15.0 million and increase or decrease, as applicable, the dilution to new investors in this offering by $1.55 per share, assuming the assumed initial public offering price remains the same, and after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

The following table shows on a pro forma basis at March 31, 2020, after giving effect to the issuance by us of 791,139 shares of our common stock in connection with the acquisition of CTEH, the total cash consideration paid to us and the average price per share paid by existing stockholders and by new investors in this offering, before deducting underwriting discounts and commissions and estimated offering expenses payable by us.

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We have not granted any awards under the 2017 Stock Plan and 2013 Stock Plan since March 31, 2020. The discussion above does not account for the grant of the IPO Awards, nor does it reflect the dilution you may experience upon any conversion of our shares of Series A-2 preferred stock into shares of common stock at a discounted rate, or upon the exercise of outstanding warrants to purchase shares of our common stock. See the sections entitled “Description of Capital Stock — Preferred Stock” and “Description of Capital Stock —Warrants.” Additionally, an aggregate of 1,155,938 additional shares of our common stock will initially be available for future awards under the 2017 Stock Plan, including the increase in the number of shares reserved for issuance thereunder authorized in connection with this offering, which shares are not included in the above discussion and tables. To the extent that we grant awards in the future with exercise prices below the initial public offering price in this offering, investors purchasing in this offering will incur additional dilution. See the section entitled “Shares Eligible for Future Sale.”

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SELECTED HISTORICAL CONSOLIDATED FINANCIAL INFORMATION

Our selected historical consolidated financial and other information presented and discussed below is derived from our audited consolidated financial statements and the notes thereto for the fiscal year ended December 31, 2019 and 2018, included elsewhere in this prospectus. Except where otherwise noted, our summary consolidated balance sheet data presented below as of December 31, 2017 and December 31, 2016, and our summary consolidated statements of operations and cash flow data presented below for the periods then ended have been derived from our financial statements not included in this prospectus. The selected consolidated financial data in this section are not intended to replace the audited consolidated financial statements and related notes thereto included elsewhere in this prospectus and are qualified in their entirety by the audited consolidated financial statements and related notes thereto included elsewhere in this prospectus. Our historical results presented below are not necessarily indicative of the results to be expected for any future period.

The summary financial data presented below represent portions of our audited consolidated financial statements and are not complete. You should read the selected historical consolidated financial data set forth below together with the sections entitled “Use of Proceeds,” “Capitalization,” “Unaudited Pro Forma Financial Information,” “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Non-GAAP Financial Information,” “Related Party Transactions,” “Description of Certain Indebtedness” and our audited consolidated financial statements and the related notes thereto included elsewhere in this prospectus.

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UNAUDITED PRO FORMA FINANCIAL INFORMATION

The following unaudited pro forma consolidated financial information and the related notes present our unaudited pro forma consolidated statements of operations for the three months ended March 31, 2020 and the year ended December 31, 2019, and our unaudited pro forma consolidated balance sheet as of March 31, 2020. The unaudited pro forma consolidated financial information has been derived by aggregating our historical consolidated financial statements and the historical financial statements of Emerging Compounds Treatment Technologies, Inc., or ECT2, and CTEH Holdings, LLC, or CTEH Holdings, each included elsewhere in this prospectus, and making certain pro forma adjustments to such aggregated financial information to give effect to the following transactions, or collectively, the Transactions:

The Transactions, along with the assumptions underlying the pro forma adjustments to the unaudited pro forma consolidated financial information, are described fully in the accompanying notes, which should be read in conjunction with the unaudited pro forma financial information.

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The table below provides the date each acquisition Transaction closed, the date and period for which each acquisition Transaction has been reflected in our historical financial statements and the date and period for which each acquisition Transaction is shown in the unaudited pro forma consolidated financial information giving effect to the Transactions as if they had occurred on the dates shown.

The acquisition of CTEH, the issuance of the Series A-2 preferred stock, our entry into the Unitranche Credit Agreement and the repayment of our prior senior secured credit facility occurred on April 13, 2020, and are therefore not reflected in our historical consolidated balance sheet as of March 31, 2020. Accordingly, pro forma adjustments to the historical consolidated balance sheet as of March 31, 2020 have been made to reflect these Transactions.

The unaudited pro forma financial information herein has been prepared to illustrate the effects of the Transactions in accordance with GAAP and pursuant to Article 11 of Regulation S-X. The historical financial information has been adjusted in the unaudited pro forma financial information to give effect to pro forma events that are (i) directly attributable to the Transactions, (ii) factually supportable and (iii) with respect to the unaudited pro forma consolidated statements of operations, expected to have a continuing impact on the combined results. However, such adjustments are estimates based on certain assumptions and may not prove to be accurate. Information regarding these adjustments is subject to risks and uncertainties that could cause actual results to differ materially from our unaudited pro forma financial information.

Each of the acquisition Transactions was accounted for as a business combination using the acquisition method of accounting under the provisions of ASC Topic 805, Business Combinations, or ASC 805, and using the fair value concepts defined in ASC Topic 820, Fair Value Measurements. Under ASC 805, all assets acquired and liabilities assumed are recorded at their acquisition date fair value. The determination of the fair values of the assets acquired and liabilities assumed (and the related determination of estimated useful lives of depreciable and amortizable tangible and identifiable intangible assets) requires significant judgment and estimates. The estimates and assumptions used include the projected timing and amount of future cash flows and discount rates reflecting risk inherent in the future cash flows related to the businesses acquired. However, for the CTEH acquisition, due to the timing of the acquisition, the excess purchase price over the carrying value of assets acquired and liabilities assumed has been estimated as the Company has not yet completed the initial purchase price allocation. The Company has used its best estimates based on the information available as of the date hereof.

In our opinion, all adjustments necessary to reflect the effects of the Transactions have been included and are based upon currently available information and assumptions that we believe are reasonable as of the date of this prospectus. Any of the factors underlying these estimates and assumptions may change or prove to be

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materially different. The unaudited pro forma financial information also does not purport to represent what our actual results of operations and financial position would have been had the Transactions occurred on the dates indicated, nor are they intended to be representative of or project our future financial condition or results of operations or financial position.

The unaudited pro forma consolidated financial information does not reflect any additional costs that may arise from being a public company or the realization of any expected cost savings, operating efficiencies or other synergies that may result from the Transactions as a result of any integration and restructuring activities or other planned cost savings initiatives following the completion of the Transactions.

The unaudited pro forma financial information is provided for informational and illustrative purposes only and should be read in conjunction with our historical financial statements and the historical financial statements of ECT2 and CTEH Holdings, each of which is included elsewhere in this prospectus, as well as the financial and other information appearing elsewhere in this prospectus, including in the sections entitled “Risk Factors,” “Use of Proceeds,” “Capitalization,” “Selected Historical Consolidated Financial Information” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations.”

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Montrose Environmental Group, Inc.

Unaudited Pro Forma Consolidated Statement of Operations

For the Three Months Ended March 31, 2020

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Montrose Environmental Group, Inc.

Unaudited Pro Forma Consolidated Statement of Operations

For the Year Ended December 31, 2019