Company: SNPS
Filing Date: 2025-03-03
Form Type: 424B5
Source: 0001140361-25-006661
Chunk: 3

Company: SYNOPSYS INC
Filing Date: 2025-03-03
Form: 424B5
Chunk 3
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| LEGAL MATTERS                                              |     | S-51 |
| EXPERTS                                                    |     | S-51 |

Prospectus

| ABOUT THIS PROSPECTUS                 |     |  1 |
| FORWARD-LOOKING STATEMENTS            |     |  2 |
| SYNOPSYS, INC.                        |     |  4 |
| RISK FACTORS                          |     |  5 |
| USE OF PROCEEDS                       |     |  5 |
| DESCRIPTION OF DEBT SECURITIES        |     |  6 |
| GLOBAL SECURITIES                     |     | 13 |
| PLAN OF DISTRIBUTION                  |     | 17 |
| LEGAL MATTERS                         |     | 19 |
| EXPERTS                               |     | 19 |
| INFORMATION INCORPORATED BY REFERENCE |     | 19 |
| WHERE YOU CAN FIND MORE INFORMATION   |     | 20 |

S-i

#### TABLE OF CONTENTS

### ABOUT THIS PROSPECTUS SUPPLEMENT
**This document is in two parts. The first part is this prospectus supplement, which describes the terms of the offering of the notes. The second part is the accompanying prospectus dated February 27, 2025, which we refer to as the “accompanying prospectus.” The accompanying prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the “SEC”) using a shelf registration statement. Under the shelf registration process, from time to time, we may offer and sell debt securities in one or more offerings. The accompanying prospectus contains a description of our debt securities and gives more general information, some of which may not apply to the notes.

This prospectus supplement, or the information incorporated by reference in this prospectus supplement, may add, update or change information in the accompanying prospectus. If information in this prospectus supplement, or the information incorporated by reference from a report or other document filed with the SEC after the date of the accompanying prospectus, is inconsistent with the accompanying prospectus, this prospectus supplement, or such information incorporated by reference, will supersede the information in the accompanying prospectus.

It is important that you read and consider all of the information contained in this prospectus supplement and the accompanying prospectus in making your investment decision. You should also read and consider the information in the documents to which we have referred you in “Where You Can Find More Information” and “Information Incorporated by Reference” in this