Exhibit 99.1

PRESS RELEASE

INVESTOR CONTACT:

Lisa L. Ewbank

Synopsys, Inc.

650-584-1901

Synopsys-ir@synopsys.com

EDITORIAL CONTACT:

Simone Souza

Synopsys, Inc.

650-584-6454

simone@synopsys.com

Synopsys Posts Financial Results for Fourth Quarter and Fiscal Year 2019

Q4 2019 Financial Highlights

FY 2019 Financial Highlights

MOUNTAIN VIEW, Calif. – Dec. 4, 2019 – Synopsys, Inc. (Nasdaq: SNPS) today reported results for its fourth quarter and fiscal year 2019. Revenue for the fourth quarter was $851.1 million, compared to $795.1 million for the fourth quarter of fiscal 2018. Revenue for fiscal year 2019 was $3.361 billion, an increase of 7.7 percent from $3.121 billion in fiscal year 2018.

“Fiscal 2019 was another outstanding year for Synopsys. Even as we navigated several external challenges, we significantly exceeded our beginning-of-year plan, and delivered strong growth in revenue, non-GAAP operating margin, earnings-per-share, and cash flow, and across both operating segments. We also returned $329 million to shareholders via stock repurchases,” said Aart de Geus, chairman and co-CEO of Synopsys. “Against a challenging global market backdrop, design activity remains strong. Our unrelenting innovation push has resulted in stronger-than-ever platforms, which are driving notable benchmark wins and increased competitive displacements. As we move into 2020, well on our way to our next milestone of $4 billion in revenue and beyond, we are targeting solid revenue growth, continued non-GAAP operating margin expansion, mid-teens non-GAAP earnings per share growth, and strong cash flow.”

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GAAP Results

On a generally accepted accounting principles (GAAP) basis, net income for the fourth quarter of fiscal 2019 was $160.7 million, or $1.04 per share, compared to $254.3 million, or $1.66 per share, for the fourth quarter of fiscal 2018. GAAP net income for fiscal year 2019 was $532.4 million, or $3.45 per share, compared to $432.5 million, or $2.82 per share, for fiscal year 2018.

Non-GAAP Results

On a non-GAAP basis, net income for the fourth quarter of fiscal 2019 was $177.1 million, or $1.15 per share, compared to non-GAAP net income of $119.6 million, or $0.78 per share, for the fourth quarter of fiscal 2018. Non-GAAP net income for fiscal year 2019 was $702.5 million, or $4.56 per share, compared to non-GAAP net income of $599.7 million, or $3.91 per share, for fiscal year 2018.

For a reconciliation between GAAP and non-GAAP results, see “GAAP to Non-GAAP Reconciliation” and the accompanying tables below.

Business Segments

Synopsys reports revenue and operating income in two segments: (1) Semiconductor & System Design, which includes EDA tools, IP products, system integration solutions and associated services, and (2) Software Integrity, which includes security and quality solutions for software development across many industries. Further information regarding these segments is provided at the end of this press release.

Financial Targets

Synopsys also provides its consolidated financial targets for the first quarter and full fiscal year 2020. These financial targets do not assume any revenue from companies currently on the U.S. government’s “Entity List.” These targets constitute forward-looking statements and are based on current expectations. For a discussion of factors that could cause actual results to differ materially from these targets, see “Forward-Looking Statements” below.

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First Quarter and Fiscal Year 2020 Financial Targets

(in millions except per share amounts)

Earnings Call Open to Investors

Synopsys will hold a conference call for financial analysts and investors today at 2:00 p.m. Pacific Time. A live webcast of the call will be available on Synopsys’ corporate website at www.synopsys.com. A recording of the call will be available by calling +1-866-207-1041 (+1-402-970-0847 for international callers), access code 1966519, beginning at 5:00 p.m. Pacific Time today, until 11:59 p.m. Pacific Time on December 11, 2019. A webcast replay will also be available on the website from approximately 5:30 p.m. Pacific Time today through the time Synopsys announces its results for the first quarter of fiscal year 2020 in February 2020. Synopsys will post copies of the prepared remarks of Aart de Geus, chairman and co-chief executive officer, and Trac Pham, chief financial officer, on its website following today’s call. In addition, Synopsys makes additional information available in a financial supplement and corporate overview presentation, also posted on the corporate website.

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Effectiveness of Information

The targets included in this press release, the statements made during the earnings conference call and the information contained in the financial supplement and corporate overview presentation (available in the Investor Relations section of Synopsys’ corporate website at www.synopsys.com) represent Synopsys’ expectations and beliefs as of the date of this release only. Although this press release, copies of the prepared remarks of the co-chief executive officer and chief financial officer made during the call, the financial supplement, and the corporate overview presentation will remain available on Synopsys’ website through the date of the first quarter fiscal year 2020 earnings call in February 2020, their continued availability through such date does not mean that Synopsys is reaffirming or confirming their continued validity. Synopsys does not currently intend to report on its progress during the first quarter of fiscal year 2020 or comment to analysts or investors on, or otherwise update, the targets given in this release.

Availability of Final Financial Statements

Synopsys will include final financial statements for fiscal year 2019 in its annual report on Form 10-K to be filed by January 1, 2020.

About Synopsys

Synopsys, Inc. (Nasdaq: SNPS) is the Silicon to Software^™ partner for innovative companies developing the electronic products and software applications we rely on every day. As the world’s 15th largest software company, Synopsys has a long history of being a global leader in electronic design automation (EDA) and semiconductor IP and is also growing its leadership in software security and quality solutions. Whether you’re a system-on-chip (SoC) designer creating advanced semiconductors, or a software developer writing applications that require the highest security and quality, Synopsys has the solutions needed to deliver innovative, high-quality, secure products. Learn more at www.synopsys.com.

GAAP to Non-GAAP Reconciliation

Synopsys continues to provide all information required in accordance with GAAP but believes evaluating its ongoing operating results may not be as useful if an investor is limited to reviewing only GAAP financial measures. Accordingly, Synopsys presents non-GAAP financial measures in reporting its financial results to provide investors with an additional tool to evaluate Synopsys’ operating results in a manner that focuses on what Synopsys believes to be its core business operations and what Synopsys uses to evaluate its business operations and for internal planning and forecasting purposes. Synopsys’ management does not itself, nor does it suggest that investors should, consider such non-GAAP financial measures in isolation from, or as a substitute for, financial information prepared in accordance with GAAP. Synopsys’ management believes it is useful for itself and investors to review, as applicable, both GAAP information that includes: (i) the amortization of acquired intangible assets, (ii) the impact of stock compensation, (iii) acquisition-related costs, (iv) restructuring charges, (v) the effects of certain settlements, final judgments and loss contingencies related to legal proceedings, (vi) the various income tax impacts prompted by the Tax Cut and Jobs Act of 2017 enacted on December 22, 2017 (“U.S. Tax Reform”), including the income tax related to transition tax and the tax rate change, and (vii) the income tax effect of non-GAAP pre-tax adjustments; and the non-GAAP measures that exclude such information in order to assess the performance of Synopsys’ business and for planning and forecasting in subsequent periods.

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Synopsys utilizes a normalized annual non-GAAP tax rate in the calculation of its non-GAAP measures to provide better consistency across interim reporting periods by eliminating the effects of non-recurring and period-specific items such as tax audit settlements, which can vary in size and frequency and not necessarily reflect our normal operations, and to more clearly align our tax rate with our expected geographic earnings mix. In projecting this rate, we evaluate our historical and projected mix of U.S. and international profit before tax, excluding the impact of stock-based compensation, the amortization of purchased intangibles and other non-GAAP adjustments described above. We also consider other factors including our current tax structure, our existing tax positions, and expected recurring tax incentives, such as the U.S. federal research and development tax credit. On an annual basis we re-evaluate this rate for significant events that may materially affect our projections. Based upon our review, our projected normalized annual non-GAAP tax rate remains 16% through fiscal year 2021. We will re-evaluate this rate on an annual basis, but further regulatory guidance regarding specific parts of U.S. Tax Reform could materially change our projections. Notwithstanding the foregoing, we excluded from the normalized annual non-GAAP tax rate unusual and infrequent events, such as tax audit settlements and certain impacts of U.S. Tax Reform as described above.

Whenever Synopsys uses a non-GAAP financial measure, it provides a reconciliation of the non-GAAP financial measure to the most closely applicable GAAP financial measure. Investors are encouraged to review the related GAAP financial measures and the reconciliation of these non-GAAP financial measures to their most directly comparable GAAP financial measure as detailed below, as well as Item 2.02 of the Current Report on Form 8-K filed on December 4, 2019 for additional information about the measures Synopsys uses to evaluate its core business operations.

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Reconciliation of Fourth Quarter and Fiscal Year 2019 Results

The following tables reconcile the specific items excluded from GAAP in the calculation of non-GAAP net income and earnings per share for the periods indicated below.

GAAP to Non-GAAP Reconciliation of Fourth Quarter and Fiscal Year 2019 Results ⁽¹⁾

(unaudited and in thousands, except per share amounts)

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Reconciliation of 2020 Targets

The following tables reconcile the specific items excluded from GAAP in the calculation of non-GAAP targets for the periods indicated below.

GAAP to Non-GAAP Reconciliation of First Quarter Fiscal Year 2020 Targets ⁽¹⁾

(in thousands, except per share amounts)

GAAP to Non-GAAP Reconciliation of Full Fiscal Year 2020 Targets ⁽¹⁾

(in thousands, except per share amounts)

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Forward-Looking Statements

This press release contains forward-looking statements within the meaning of Section 21E of the Securities Exchange Act of 1934, including, but not limited to, financial targets for the first quarter and full fiscal year 2020, as well as statements related to our long-term revenue, non-GAAP EPS and non-GAAP operating margin objectives, and the expected impact of the U.S. government action on our results. These statements involve known and unknown risks, uncertainties and other factors that could cause actual results to differ materially from those expressed or implied in our forward-looking statements. Accordingly, we caution stockholders and prospective investors not to place undue reliance on these statements. Such risks, uncertainties and factors include, but are not limited to: additional administrative, legislative or regulatory action by the U.S. or foreign governments, such as the imposition of additional tariffs or export restrictions, which could further interfere with our ability to provide products and services in certain countries; the response by current or potential customers and their willingness to purchase products and services from us in the future; uncertainty in the growth of the semiconductor and electronics industries; consolidation among our customers and our dependence on a relatively small number of large customers; uncertainty in the global economy; fluctuation of our operating results; increased variability in our revenue due to the adoption of ASC 606, including the resulting increase in recognizing upfront revenue as a percentage of total revenue; our highly competitive industries and our ability to meet our customers’ demand for innovative technology at lower costs; risks and compliance obligations relating to the global nature of our operations; cybersecurity threats or other security breaches; our ability to protect our proprietary technology; our ability to realize the potential financial or strategic benefits of acquisitions we complete; our ability to carry out our new product and technology initiatives; investment of more resources in research and development than anticipated; increased risks resulting from an increase in sales of our hardware products, including increased variability in upfront revenue; changes in accounting principles or standards; changes in our effective tax rate; liquidity requirements in our U.S. operations; claims that our products infringe on third-party intellectual property rights; litigation; product errors or defects; the ability to obtain licenses to third-party software and intellectual property on reasonable terms or at all; the ability to timely recruit and retain senior management and key employees; the inherent limitations on the effectiveness of our controls and compliance programs; the impairment of our investment portfolio by the deterioration of capital markets; the accuracy of certain assumptions, judgments and estimates that affect amounts reported in our financial statements; and the impact of catastrophic events. More information on potential risks, uncertainties and other factors that could affect Synopsys’ results is included in filings it makes with the Securities and Exchange Commission from time to time, including in the sections entitled “Risk Factors” in its Annual Report on Form 10-K for the fiscal year ended October 31, 2018 and its latest Quarterly Report on Form 10-Q. The information provided herein is as of December 4, 2019. Synopsys undertakes no duty, and does not intend, to update any forward-looking statement, whether as a result of new information, future events or otherwise, unless required by law.

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SYNOPSYS, INC.

Unaudited Consolidated Statements of Operations (1)

(in thousands, except per share amounts)

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SYNOPSYS, INC.

Unaudited Reconciliation of Consolidated Statements of Operations

Under ASC 606 & ASC 605 ⁽¹⁾

(in thousands, except per share amounts)

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SYNOPSYS, INC.

Unaudited Reconciliation of Consolidated Statements of Operations

Under ASC 606 & ASC 605 ⁽¹⁾

(in thousands, except per share amounts)

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SYNOPSYS, INC.

Unaudited Consolidated Balance Sheets (1)

(in thousands, except par value amounts)

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SYNOPSYS, INC.

Unaudited Consolidated Statements of Cash Flows (1)

(in thousands)

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SYNOPSYS, INC.

Business Segment Reporting ⁽¹⁾

(in millions)

Total Adjusted Segment Operating Income Reconciliation ⁽¹⁾⁽²⁾

(in millions)

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