Company: SNPS
Filing Date: 2025-02-27
Form Type: S-3ASR
Source: 0001140361-25-006339
Chunk: 1

Company: SYNOPSYS INC
Filing Date: 2025-02-27
Form: S-3ASR
Chunk 1
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 effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒ If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer |     | ☒ |     | Accelerated filer         |     | ☐ |
| Non-accelerated filer   |     | ☐ |     | Smaller reporting company |     | ☐ |
|                         |     |   |     | Emerging growth company   |     | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.☐

#### TABLE OF CONTENTS

### PROSPECTUS

#### Synopsys, Inc.

#### Debt Securities
**This prospectus relates to the offering of debt securities of Synopsys, Inc. in one or more offerings. Specific terms of any debt securities to be offered will be provided in supplements to this prospectus. You should read this prospectus and any supplement, together with the documents we incorporate by reference, carefully before you invest. A supplement may also add to, update, supplement, change or clarify information contained in this prospectus with respect to an offering of debt securities.

Our common stock is listed on The NASDAQ Global Select Market under the symbol “SNPS.” Unless stated otherwise in a prospectus supplement, none of these securities will be listed on any securities exchange.

We may offer and sell these securities to or through one or more agents, underwriters, dealers or other third parties or directly to one or more purchasers on a continuous or delayed basis.

Investing in our securities involves risks. You should carefully consider the risks described under “Risk Factors” on page**

#### 5
**of this prospectus, as well as