Company: SNPS
Filing Date: 2025-03-05
Form Type: 424B5
Source: 0001140361-25-007235
Chunk: 3

Company: SYNOPSYS INC
Filing Date: 2025-03-05
Form: 424B5
Chunk 3
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 underwriters expect to deliver the notes to purchasers through the book-entry delivery system of DTC (as defined herein) for the accounts of its participants, including Clearstream Banking, S.A. and the Euroclear System, on or about March 17, 2025, which is the tenth business day following the date of this prospectus supplement (the settlement cycle being referred to as “T+10”). Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), trades in the secondary market are generally required to settle in one business day, unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade notes more than one business day prior to their date of delivery will be required, by virtue of the fact that the notes initially settle in T+10, to specify an alternate settlement arrangement at the time of any such trade to prevent a failed settlement and should consult their own advisors. Joint Book-Running Managers

| BofA Securities |     | HSBC |     | J.P. Morgan |

| Mizuho |     | Scotiabank |     | TD Securities |     | Truist     
 Securities |     | Wells Fargo 
 Securities  |

| (Book-running           
 manager for 2032 notes, 
 2035 notes and          
 2055 notes)             |     | -Book-running              
 manager for 2027 notes and 
 2028 notes                 |     | -Book-running              
 manager for 2027 notes and 
 2028 notes                 |     | -Book-running           
 manager for 2030 notes, 
 2032 notes and          
 2055 notes              |     | -Book-running              
 manager for 2030 notes and 
 2035 notes                 |

Co-Managers

| Evercore ISI |     | MUFG |     | PNC Capital Markets LLC |     | US Bancorp |

The date of this prospectus supplement is March 3, 2025.

TABLE OF CONTENTS

TABLE OF CONTENTS Prospectus Supplement

|                                                            |     | Page |
| ABOUT THIS PROSPECTUS SUPPLEMENT                           |     | S-ii |
| WHERE YOU CAN FIND MORE INFORMATION                        |     | S-iv |
| INFORMATION INCORPORATED BY REFERENCE                      |     | S-iv |
| CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS |     | S-v  |
| SUMMARY                                                    |     | S-1