Exhibit 99.1

Intrexon Announces Second Quarter and First Half 2015 Financial Results

– Record quarterly revenues of $44.9 million and Adjusted EBITDA of $54.4 million –

– GAAP net loss of $40.7 million and pro forma net income of $0.9 million

excluding ZIOPHARM Oncology special stock dividend –

– Technology access fees and reimbursement of R&D services covered 187% of cash opex in 1H –

GERMANTOWN, MD, August 10, 2015 – Intrexon Corporation (NYSE: XON), a leader in synthetic biology, today announced its second quarter and first half results for 2015.

Business Highlights and Recent Developments:

Second Quarter Financial Highlights:

First Half Financial Highlights:

“We continue satisfactorily to balance contemporary inputs to outputs while advancing a growing portfolio of programs that should provide significant and unburdened contribution to our bottom line,” commented Randal J. Kirk, Chairman and Chief Executive Officer of Intrexon. “The scalability of our technology platforms and our organizational model are allowing us to grow our company rapidly across an ever diversifying array of great product candidates while we add important new talent to our team. That we can execute such an ambitious plan while also making acquisitions that provide positions of genuine industrial leadership is a testament to the great team that so zealously advances our mission to ‘power the bioindustrial revolution.’”

Second Quarter 2015 Financial Results Compared to Prior Year Period

Total revenues were $44.9 million for the quarter ended June 30, 2015 compared to $11.8 million for the quarter ended June 30, 2014, an increase of $33.1 million, or 281%. Product revenue includes $12.6 million from

the sale of pregnant cows, live calves and the sale of livestock used in production. Service revenue totaling $11.6 million relates to the provision of in vitro fertilization and embryo transfer services performed. Collaboration revenues increased $5.4 million due to (i) the recognition of deferred revenue for upfront payments received from our license and collaboration agreement with the biopharmaceutical business of Merck KGaA, which became effective in May 2015, and from collaborations signed by us between July 1, 2014 and June 30, 2015, (ii) the recognition of research and development services performed by us pursuant to these new collaborations, and (iii) increased research and development services performed by us related to collaboration programs in effect prior to July 1, 2014 as a result of progression of current programs and the initiation of new programs with these collaborators.

Total operating expenses were $62.3 million for the quarter ended June 30, 2015 compared to $29.9 million for the quarter ended June 30, 2014, an increase of $32.4 million, or 108%. Research and development expenses were $20.4 million for the quarter ended June 30, 2015 compared to $14.4 million for the quarter ended June 30, 2014, an increase of $5.9 million, or 41%. Salaries, benefits and other personnel costs increased $2.5 million due to (i) increases in research and development headcount to support the new collaborations discussed above, and (ii) compensation expenses related to performance and retention incentives for research and development employees. Lab supplies and consultants increased $2.1 million due to the increased level of research and development services provided to our collaborators. Selling, general and administrative expenses were $23.7 million for the quarter ended June 30, 2015 compared to $15.4 million for the quarter ended June 30, 2014, an increase of $8.3 million, or 54%. Salaries, benefits and other personnel costs increased $5.5 million due to (i) the inclusion of selling, general and administrative employees of companies we have acquired since July 1, 2014, including Trans Ova and ActoGeniX, and (ii) compensation expenses related to performance and retention incentives for general and administrative employees. Depreciation and amortization increased $0.8 million primarily as a result of property and equipment and intangible assets acquired from Trans Ova. Total operating expenses for the quarter ended June 30, 2015 also include $18.2 million of products and services costs which primarily consist of employee compensation costs, livestock, feed, drug supplies and facility charges related to the production of such products and services.

Total other expense, net, was $21.0 million for the quarter ended June 30, 2015 compared to $33.8 million for the quarter ended June 30, 2014, a decrease of $12.8 million, or 38%. This decrease was primarily related to the changes in the value of our securities portfolio, including a realized gain of $81.4 million which resulted from the special stock dividend of all of our shares of ZIOPHARM to our shareholders in June 2015.

First Half 2015 Financial Results Compared to Prior Year Period

Total revenues were $78.7 million for the six months ended June 30, 2015 compared to $19.6 million for the six months ended June 30, 2014, an increase of $59.1 million, or 302%. Product revenue includes $20.1 million from the sale of pregnant cows, live calves and the sale of livestock used in production. Service revenue totaling $20.0 million relates to the provision of in vitro fertilization and embryo transfer services performed. Collaboration revenues increased $12.4 million due to (i) the recognition of deferred revenue for upfront payments received from our license and collaboration agreement with the biopharmaceutical business of Merck KGaA, which became effective in May 2015, collaborations signed by us between July 1, 2014 and June 30, 2015 and our collaboration with Intrexon Energy Partners, which was signed in March 2014, (ii) recognition of research and development services performed by us pursuant to these new collaborations, and (iii) increased research and development services performed by us for collaborations in effect prior to July 1, 2014 as a result of the progression of current programs and the initiation of new programs with these collaborators.

Total operating expenses were $183.3 million for the six months ended June 30, 2015 compared to $55.6 million for the six months ended June 30, 2014, an increase of $127.7 million, or 230%. Research and development expenses were $99.7 million for the six months ended June 30, 2015 compared to $26.5 million for the six

months ended June 30, 2014, an increase of $73.2 million, or 276%. In January 2015, we issued 2,100,085 shares of our common stock valued at $59.6 million to the University of Texas MD Anderson Cancer Center, or MD Anderson, in exchange for an exclusive license to certain technologies owned by MD Anderson. Salaries, benefits and other personnel costs increased $5.9 million due to (i) increases in research and development headcount to support the new collaborations discussed above, and (ii) compensation expenses related to performance and retention incentives for research and development employees. Lab supplies and consultants expenses increased $4.0 million as a result of the increased level of research and development services provided to our collaborators. Selling, general and administrative expenses were $51.3 million for the six months ended June 30, 2015 compared to $29.0 million for the six months ended June 30, 2014, an increase of $22.3 million, or 77%. Salaries, benefits and other personnel costs increased $13.4 million due to (i) the inclusion of selling, general and administrative employees of companies we have acquired since July 1, 2014, including Trans Ova and ActoGeniX, and (ii) compensation expenses related to performance and retention incentives for general and administrative employees. Stock-based compensation expenses for the annual options granted to our non-employee directors, pursuant to our non-employee director compensation policy, increased $1.0 million due to a higher grant-date fair value in 2015 compared to 2014. Legal and professional expenses increased $2.7 million primarily due to costs associated with acquisitions, the license agreement with MD Anderson, the January 2015 public securities offering and other business development activity. Depreciation and amortization increased $1.6 million primarily as a result of property and equipment and intangible assets acquired from Trans Ova. Total operating expenses for the six months ended June 30, 2015 also include $32.1 million of products and services costs which primarily consist of employee compensation costs, livestock, feed, drug supplies and facility charges related to the production of such products and services.

Total other income, net, was $94.7 million for the six months ended June 30, 2015 compared to total other expense, net, of $11.8 million for the six months ended June 30, 2014, an increase of $106.5 million, or 903%. This increase was primarily related to the changes in the value of our securities portfolio, including a realized gain of $81.4 million which resulted from the special stock dividend of all of our shares of ZIOPHARM to our shareholders in June 2015.

Conference Call and Webcast

The Company will host a conference call on August 10, 2015, at 5:30 PM ET to discuss the second quarter and first half 2015 financial results and provide a general business update. The conference call may be accessed by dialing 1-888-346-3959 (Domestic US) and 1-412-902-4262 (International) and asking to join the “Intrexon Corporation Call.” Participants may also access the live webcast through Intrexon’s website in the Investors section under Calendar of Events.

About Intrexon Corporation

Intrexon Corporation (NYSE: XON) is Powering the Bioindustrial Revolution with Better DNA™ to create biologically-based products that improve the quality of life and the health of the planet. The Company’s integrated technology suite provides its partners across diverse markets with industrial-scale design and development of complex biological systems delivering unprecedented control, quality, function, and performance of living cells. We call our synthetic biology approach Better DNA^®, and we invite you to discover more at www.dna.com.

Non-GAAP Financial Measures

This press release presents Adjusted EBITDA, Adjusted EBITDA per share, Pro Forma Net Income Attributable to Intrexon and Pro Form Net Income Attributable to Intrexon Per Basic Share which are non-GAAP financial measures within the meaning of applicable rules and regulations of the Securities and Exchange Commission (SEC). For a reconciliation of these measures to the most directly comparable financial measure calculated in accordance with generally accepted accounting principles and for a discussion of the reasons why the company

believes that these non-GAAP financial measures provide information that is useful to investors see the tables below under “Reconciliation of GAAP to Non-GAAP Measures.” Such information is provided as additional information, not as an alternative to Intrexon’s consolidated financial statements presented in accordance with GAAP, and is intended to enhance an overall understanding of the Company’s current financial performance.

Trademarks

Intrexon, UltraVector, LEAP and Better DNA are trademarks of Intrexon and/or its affiliates. Other names may be trademarks of their respective owners.

Safe Harbor Statement

Some of the statements made in this press release are forward-looking statements that involve a number of risks and uncertainties and are made pursuant to the Safe harbor Provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based upon Intrexon’s current expectations and projections about future events and generally relate to Intrexon’s plans, objectives and expectations for the development of Intrexon’s business. Although management believes that the plans and objectives reflected in or suggested by these forward-looking statements are reasonable, all forward-looking statements involve risks and uncertainties and actual future results may be materially different from the plans, objectives and expectations expressed in this press release. These risks and uncertainties include, but are not limited to, (i) Intrexon’s current and future ECCs and joint ventures; (ii) Intrexon’s ability to successfully enter new markets or develop additional products, whether with its collaborators or independently; (iii) actual or anticipated variations in Intrexon’s operating results; (iv) actual or anticipated fluctuations in Intrexon’s competitors’ or its collaborators’ operating results or changes in their respective growth rates; (v) Intrexon’s cash position; (vi) market conditions in Intrexon’s industry; (vii) Intrexon’s ability, and the ability of its collaborators, to protect Intrexon’s intellectual property and other proprietary rights and technologies; (viii) Intrexon’s ability, and the ability of its collaborators, to adapt to changes in laws or regulations and policies; (ix) the rate and degree of market acceptance of any products developed by a collaborator under an ECC or through a joint venture; (x) Intrexon’s ability to retain and recruit key personnel; (xi) Intrexon’s expectations related to the use of proceeds from its public offerings and other financing efforts; (xii) Intrexon’s estimates regarding expenses, future revenue, capital requirements and needs for additional financing; and (xiii) Intrexon’s expectations relating to its subsidiaries and other affiliates. For a discussion of other risks and uncertainties, and other important factors, any of which could cause Intrexon’s actual results to differ from those contained in the forward-looking statements, see the section entitled “Risk Factors” in Intrexon’s Annual Report on Form 10-K, as well as discussions of potential risks, uncertainties, and other important factors in Intrexon’s subsequent filings with the Securities and Exchange Commission. All information in this press release is as of the date of the release, and Intrexon undertakes no duty to update this information unless required by law.

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For more information regarding Intrexon Corporation, contact:

Investor Contact:

Christopher Basta

Vice President, Investor Relations

Tel: +1 (561) 410-7052

investors@intrexon.com

Corporate Contact:

Marie Rossi, Ph.D.

Senior Manager, Technical Communications

Tel: +1 (301) 556-9850

publicrelations@intrexon.com

Intrexon Corporation and Subsidiaries

Consolidated Balance Sheets

(Unaudited)

Intrexon Corporation and Subsidiaries

Consolidated Statements of Operations

(Unaudited)

Intrexon Corporation and Subsidiaries

Reconciliation of GAAP to Non-GAAP Measures

(Unaudited)

Adjusted EBITDA and Adjusted EBITDA per share. To supplement Intrexon’s financial information presented in accordance with U.S. generally accepted accounting principles (“GAAP”), Intrexon presents Adjusted EBITDA and Adjusted EBITDA per share. A reconciliation of Adjusted EBITDA to Intrexon’s net income or loss attributable to Intrexon under GAAP appears below. Adjusted EBITDA is a non-GAAP financial measure that Intrexon calculates as net income or loss attributable to Intrexon adjusted for income tax expense or benefit, interest expense, depreciation and amortization, stock-based and executive incentive compensation, contribution of services by shareholder, noncash research and development expenses related to the acquisition of our license agreement with the University of Texas MD Anderson Cancer Center, realized and unrealized appreciation or depreciation in the fair value of equity securities, equity in net loss of affiliate and the change in deferred revenue related to upfront and milestone payments. Adjusted EBITDA and Adjusted EBITDA per share are key metrics for Intrexon’s management and Board of Directors for evaluating the Company’s financial and operating performance, generating future operating plans and making strategic decisions about the allocation of capital. Management and the Board of Directors believe that Adjusted EBITDA and Adjusted EBITDA per share are useful to understand the long-term performance of Intrexon’s core business and facilitates comparisons of the Company’s operating results over multiple reporting periods. Intrexon is providing this information to investors and others to assist them in understanding and evaluating the Company’s operating results in the same manner as its management and board of directors. While Intrexon believes that these non-GAAP financial measures are useful in evaluating its business, and may be of use to investors, this information should be considered as supplemental in nature and is not meant as a substitute for the related financial information prepared in accordance with GAAP. In addition, these non-GAAP financial measures may not be the same as non-GAAP financial measures presented by other companies. Adjusted EBITDA and Adjusted EBITDA per share are not measures of financial performance under GAAP, and are not intended to represent cash flows from operations nor earnings per share under GAAP and should not be used as an alternative to net income or loss as an indicator of operating performance or to represent cash flows from operating, investing or financing activities as a measure of liquidity. Intrexon compensates for the limitations of Adjusted EBITDA and Adjusted EBITDA per share by using them only to supplement the Company’s GAAP results to provide a more complete understanding of the factors and trends affecting the Company’s business. Adjusted EBITDA and Adjusted EBITDA per share have limitations as an analytical tool and you should not consider them in isolation or as a substitute for analysis of Intrexon’s results as reported under GAAP.

In addition to the reasons stated above, which are generally applicable to each of the items Intrexon excludes from its non-GAAP financial measure, Intrexon believes it is appropriate to exclude certain items from the definition of Adjusted EBITDA for the following reasons:

The following table presents a reconciliation of net income attributable to Intrexon to EBITDA and also to Adjusted EBITDA, as well as the calculation of Adjusted EBITDA per share, for each of the periods indicated:

Pro Forma Net Income Attributable to Intrexon and Pro Form Net Income Attributable to Intrexon Per Basic Share. Intrexon is providing this information to investors and others to assist them in understanding and evaluating the Company’s operating results over the periods reported in light of the effect of a special distribution. By providing an assessment of the company’s performance for the quarter and the first six months of the fiscal year without giving effect to the distribution, investors and others are able to assess the performance of Intrexon and its execution of its business in a manner consistent with prior periods. In addition, Intrexon believes that information concerning the value of the distribution to its shareholders is relevant information that its investors and others would wish to know. While Intrexon believes that these non-GAAP financial measures are useful in evaluating its business, and may be of use to investors, this information should be considered as supplemental in nature and is not meant as a substitute for the related financial information prepared in accordance with GAAP. In addition, these non-GAAP financial measures may not be the same as non-GAAP financial measures presented by other companies.

The following table presents a reconciliation of net loss attributable to Intrexon to Pro Forma Net Income Attributable to Intrexon, as well as the calculation of Pro Forma Net Income Attributable to Intrexon per basic share, for each of the periods indicated: