Exhibit 99.1

PATTERSON COMPANIES REPORTS FISCAL 2020

THIRD-QUARTER OPERATING RESULTS

St. Paul, Minn. — February 27, 2020 — Patterson Companies, Inc. (Nasdaq: PDCO) today reported consolidated net sales of approximately $1.46 billion (see attached Sales Summary for further details) in its fiscal third quarter ended January 25, 2020, an increase of 4.3 percent compared to the same period last year. Internal sales, which are adjusted for the effects of currency translation and changes in product selling relationships, also increased 4.3 percent.

Reported net income attributable to Patterson Companies, Inc. for the third quarter of fiscal 2020 totaled $23.2 million, or $0.24 per diluted share, compared to $31.2 million, or $0.33 per diluted share, in the third quarter of fiscal 2019. The year-over-year decrease in the period is primarily the result of a pre-tax charge related to the early retirement of debt and restructuring costs.

Adjusted net income¹ attributable to Patterson Companies, Inc., which excludes deal amortization costs, integration and business restructuring expenses, legal expenses, accelerated debt-related costs and discrete tax matters, totaled $44.5 million for the third quarter of fiscal 2020, or $0.47 per diluted share, compared to $35.6 million in the same quarter of fiscal 2019, or $0.38 per diluted share. The year-over-year increase in the period is primarily attributable to the improved performance across all three categories of Patterson’s dental segment, including consumables, equipment and value-added services.

“Patterson’s focused and disciplined approach to accelerate performance drove both improved top-line growth and margin expansion during the third quarter,” said Mark Walchirk, President and CEO of Patterson Companies. “In our Dental segment, we achieved positive consumables growth and continued to generate strong sales growth in equipment and value-added services. In Animal Health, we delivered continued growth in our companion business and trends in our production business improved despite end market challenges. As a result of our improved performance, we are raising our fiscal 2020 adjusted earnings guidance range to $1.50 to $1.55 from its prior range of $1.36 to $1.46 per diluted share.”

Patterson Dental

Reported net sales in our Dental segment for the third quarter of fiscal 2020, which represented approximately 44 percent of total company sales, were $626.6 million compared to $579.7 million in the third quarter of last year. Internal sales increased 8.0 percent compared to the fiscal 2019 third quarter.

Patterson Animal Health

Reported net sales in our Animal Health segment for the third quarter of fiscal 2020, which comprised approximately 56 percent of the company’s total sales, were $817.3 million compared to $807.5 million in the third quarter of last year. Internal sales for the segment increased 1.3 percent from the fiscal 2019 third quarter.

Balance Sheet and Capital Allocation

During the first nine months of fiscal 2020 Patterson Companies used $169.0 million of cash from operating activities and collected deferred purchase price receivables of $359.3 million, netting $190.3 million in cash, compared to a total of $384.9 million in the first nine months of fiscal 2019. The previous year period contained a trade accounts receivable facility amount of $171.0 million and the current period contained a trade accounts receivable facility amount of $29.0 million. Free cash flow¹ (see definition below and attached free cash flow table) generated year-to-date in fiscal 2020 is $51.5 million lower than the year ago period primarily due to the timing of cash conversion associated with the financing of a higher level of equipment sales and increased inventory.

In the third quarter of fiscal 2020, Patterson Companies paid $25.0 million in cash dividends to shareholders. On a year-to-date basis, Patterson has returned $75.5 million in cash dividends to shareholders.

Year-to-Date Results

Consolidated reported net sales for the first nine months of fiscal 2020 totaled $4.2 billion, a 1.6 percent year-over-year increase. Internal sales have increased 2.2 percent compared to the first nine months of fiscal 2019. Reported net income attributable to Patterson Companies, Inc. was $20.1 million, or $0.21 per diluted share, compared to $55.6 million, or $0.60 per diluted share in last year’s period. The year-over-year decline is primarily due to an increase in legal expenses and a pre-tax charge related to the early retirement of debt, partially offset by an investment gain. Adjusted net income¹ attributable to Patterson Companies, Inc., which excludes deal amortization costs, integration and business restructuring expenses, legal expenses, accelerated debt-related costs, discrete tax matters and an investment gain, totaled $106.5 million, or $1.12 per diluted share, compared to $95.9 million, or $1.03 per diluted share, in the year-ago period. The year-over-year increase is primarily attributable to improved performance in the dental segment across consumables, equipment and value-added services.

FY2020 Guidance

Patterson Companies today updated its fiscal 2020 earnings guidance, which is provided on both a GAAP and non-GAAP adjusted¹ basis:

Our guidance is for current operations as well as completed or previously announced acquisitions and does not include the impact of potential future acquisitions or similar transactions, if any, or impairments and material restructurings beyond those previously publicly disclosed. Our guidance assumes North American and international market conditions similar to those experienced in fiscal 2019.

¹Non-GAAP Financial Measures

The Reconciliation of GAAP to non-GAAP Measures table appearing behind the accompanying financial information is provided to adjust reported GAAP measures, namely operating income, income before taxes, income tax expense, net income, net income attributable to Patterson Companies, Inc. and diluted earnings per share attributable to Patterson Companies, Inc., for the impact of deal amortization costs, integration and business restructuring expenses, legal expenses, accelerated debt-related costs and an investment gain, along with the related tax effects of these items.

The term “free cash flow” used in this release is defined as net cash provided by (used in) operating activities less capital expenditures less the one-time benefit from the initiation of our trade account receivables facility plus collection of deferred purchase price receivables.

In addition, the term “internal sales” used in this release represents net sales adjusted to exclude foreign currency impact and changes in product selling relationships. Foreign currency impact represents the difference in results that is attributable to fluctuations in currency exchange rates the company uses to convert results for all foreign entities where the functional currency is not the U.S. dollar. The company calculates the impact as the difference between the current period results translated using the current period currency exchange rates and using the comparable prior period’s currency exchange rates. The company believes the disclosure of net sales changes in constant currency provides useful supplementary information to investors in light of significant fluctuations in currency rates.

Management believes that these non-GAAP measures may provide a helpful representation of the company’s third-quarter performance and earnings guidance, and enable comparison of financial results between periods where certain items may vary independent of business performance. These non-GAAP financial measures are presented solely for informational and comparative purposes and should not be regarded as a replacement for corresponding, similarly captioned, GAAP measures.

Third-Quarter Conference Call and Replay

Patterson Companies’ fiscal 2020 third-quarter earnings conference call will start at 10 a.m. Eastern today. Investors can listen to a live webcast of the conference call at www.pattersoncompanies.com. The conference call will be archived on the Patterson Companies website. A replay of the fiscal 2020 third-quarter conference call can be heard for one week at 800-585-8367 and by providing the Conference ID 8859746 when prompted.

About Patterson Companies, Inc.

Patterson Companies, Inc. (Nasdaq: PDCO) is a value-added distributor serving the dental and animal health markets.

Dental Market

Patterson’s Dental segment provides a virtually complete range of consumable dental products, equipment and software, turnkey digital solutions and value-added services to dentists and dental laboratories throughout North America.

Animal Health Market

Patterson’s Animal Health segment is a leading distributor of products, services and technologies to both the production and companion animal health markets in North America and the U.K.

The U.S. Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements to encourage companies to provide prospective information, so long as those statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those disclosed in the statement.

This press release contains, and our officers and representatives may from time to time make, certain “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995, including statements regarding future financial performance, and the objectives and expectations of management. Forward-looking statements often include words such as “believes,” “expects,” “anticipates,” “estimates,” “intends,” “plans,” “seeks” or words of similar meaning, or future or conditional verbs, such as “will,” “should,” “could” or “may.” Forward-looking statements are neither historical facts nor assurances of future performance. Instead, they are based only on our current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, projections, anticipated events and trends, the economy and other future conditions. Because forward-looking statements relate to the future, they are subject to inherent uncertainties, risks and changes in circumstances that

are difficult to predict and many of which are outside of our control. Our actual results and financial condition may differ materially from those indicated in the forward-looking statements. Therefore, you should not place undue reliance on any of these forward-looking statements.

Any number of factors could affect our actual results and cause such results to differ materially from those contemplated by any forward-looking statements, including, but not limited to, the following: the effects of the highly competitive dental and animal health supply markets in which we compete; general economic conditions, including political and economic uncertainty; our dependence on relationships with sales representatives, service technicians and customers; potential disruption of distribution capabilities, including service issues with third-party shippers; our dependence on suppliers for the manufacture and supply of the products we sell; the risk that private label sales could adversely affect our sales of other products; our dependence on positive perceptions of Patterson’s reputation; litigation risks, including new or unanticipated litigation developments; changes in consumer preferences; fluctuations in quarterly financial results; risks from the expansion of customer purchasing power; increased competition from third-party online commerce sites; the risks inherent in international operations, including currency fluctuations; the effects of health care reform; failure to comply with regulatory requirements and data privacy laws; risks from disruption to our information systems; cyberattacks or other privacy or data security breaches; volatility in the financial markets; volatility in the price of our common stock; our dependence on our senior management; disruptions from our enterprise resource planning system initiatives; and risks associated with interest rate fluctuations. The order in which these factors appear should not be construed to indicate their relative importance or priority. We caution that these factors may not be exhaustive, accordingly, any forward-looking statements contained herein should not be relied upon as a prediction of actual results.

You should carefully consider these and other relevant factors, including those risk factors in Part I, Item 1A, (“Risk Factors”) in our most recent Form 10-K, and information which may be contained in our other filings with the U.S. Securities and Exchange Commission, or SEC, when reviewing any forward-looking statement. Investors should understand it is impossible to predict or identify all such factors or risks. As such, you should not consider the foregoing list, or the risks identified in our SEC filings, to be a complete discussion of all potential risks or uncertainties.

Any forward-looking statement made by us in this press release is based only on information currently available to us and speaks only as of the date on which it is made. We do not undertake any obligation to release publicly any revisions to any forward-looking statements whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise.

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PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(In thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

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PATTERSON COMPANIES, INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

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PATTERSON COMPANIES, INC.

SALES SUMMARY

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PATTERSON COMPANIES, INC.

SALES SUMMARY

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PATTERSON COMPANIES, INC.

OPERATING INCOME BY SEGMENT

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PATTERSON COMPANIES, INC.

RECONCILIATION OF GAAP TO NON-GAAP MEASURES

(Dollars in thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

RECONCILIATION OF GAAP TO NON-GAAP MEASURES

(Dollars in thousands, except per share amounts)

(Unaudited)

PATTERSON COMPANIES, INC.

FREE CASH FLOW

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(Unaudited)