Item 2.05 Costs Associated with Exit or Disposal Activities. On November 9, 2025, the Board of Directors of Synopsys, Inc. (“ Synopsys”) approved a restructuring plan that is expected to result in the termination of approximately 10% of Synopsys’ workforce as of fiscal 2025 year-end(the “ Restructuring Plan”). This restructuring will allow Synopsys to invest in key growth opportunities and drive business efficiencies following the completion of its acquisition of ANSYS, Inc. Synopsys currently estimates that it will recognize pre-taxcharges to its GAAP financial results ranging from $300 million to $350 million consisting of severance and other one-timetermination benefits, and other costs such as certain site closures as part of its global site strategy. Synopsys expects a majority of the workforce reductions in fiscal year 2026 and to substantially complete the Restructuring Plan by the end of fiscal year 2027, subject to local law and consultation requirements. This Item 2.05 includes certain forward-looking statements with respect to the size and scope of the restructuring, and the approximate amount and expected timing of the related charges. These statements involve risks, uncertainties and other factors that could cause Synopsys’ actual results, time frames or achievements to differ materially from those expressed or implied in such forward-looking statements. Such risks, uncertainties and factors include but are not limited to, Synopsys’ ability to implement the restructuring in various jurisdictions, possible changes in the size, components and timing of the expected costs and charges, Synopsys’ ability to achieve the benefits of the announced restructuring, and the risks more fully described in filings Synopsys makes with the SEC from time to time, including in the sections entitled “ Risk Factors” in Synopsys’ latest Annual Report on Form 10-Kand in Synopsys’ latest Quarterly Report on Form10-Q. The information provided herein is as of November 12, 2025. Synopsys undertakes no duty to, 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. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. SYNOPSYS, INC. Dated: November 12, 2025 By: /s/ JANET LEE Janet Lee General Counsel and Corporate Secretary