Company: SNPS
Filing Date: 2025-03-05
Form Type: 424B5
Source: 0001140361-25-007235
Chunk: 2

Company: SYNOPSYS INC
Filing Date: 2025-03-05
Form: 424B5
Chunk 2
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 defined herein) and the Bridge Commitment (as defined herein), if applicable, to fund the acquisition, to pay related transaction fees and expenses and to repay Ansys’ outstanding indebtedness. See “Use of Proceeds.” The closing of this offering is not contingent on the consummation of the acquisition, which, if completed, will occur subsequent to the closing of this offering, and there can be no assurance that the acquisition will be consummated on the terms described herein or at all. However, if (i) the Ansys Merger (as defined herein) is not consummated on or before the later of (x) January 31, 2026 and (y) the date that is five business days after any later date upon which “Closing” is permitted to occur under the terms of the Merger Agreement (as defined herein) (as mutually agreed upon by the parties to the Merger Agreement) (the “Special Mandatory Redemption End Date”) or (ii) Synopsys notifies the trustee under the indenture in writing that Synopsys will not pursue consummation of the Ansys Merger, Synopsys will be required to redeem all outstanding 2027 notes, 2028 notes, 2030 notes and 2032 notes (the “Special Mandatory Redemption”), at a special mandatory redemption price equal to 101% of the aggregate principal amount of the 2027 notes, 2028 notes, 2030 notes and 2032 notes, plus accrued and unpaid interest, if any, to, but excluding, the Special Mandatory Redemption Date (as defined herein). The 2035 notes and 2055 notes are not subject to the Special Mandatory Redemption. The proceeds from this offering will not be deposited into an escrow account pending

TABLE OF CONTENTS

completion of the Ansys Merger or any Special Mandatory Redemption, nor will Synopsys be required to grant any security interest or other lien on those proceeds to secure any redemption of the notes. See “Description of the Notes—Special Mandatory Redemption” and “Use of Proceeds” in this prospectus supplement. The notes will not be listed on any securities exchange. Currently, there is no public market for any series of the notes. Investing in the notes involves risks. See the “Risk Factors” section beginning on page S- 20of this prospectus supplement.

|               |     | Public Offering 
        Price(1) |     | Underwriting 
     Discount |     |        Proceeds,