Company: SNPS
Filing Date: 2025-05-28
Form Type: S-8
Source: 0001193125-25-129539
Chunk: 0

Company: SYNOPSYS INC
Filing Date: 2025-05-28
Form: S-8
Chunk 0
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As filed with the Securities and Exchange Commission on May 28, 2025 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 SYNOPSYS, INC. (Exact Name of Registrant as Specified in Its Charter)

| Delaware                        |     | 56-1546236         |
| (State or Other Jurisdiction of 
 Incorporation or Organization)  |     | -I.R.S. Employer   
 Identification No. |

| 675 Almanor Ave.                         
 Sunnyvale, California                    |     |     94085 |
| (Address of Principal Executive Offices) |     | -Zip Code |

Synopsys, Inc. 2006 Employee Equity Incentive Plan, as amended Synopsys, Inc. Employee Stock Purchase Plan, as amended (Full Title of the Plan) John F. Runkel, Jr. General Counsel and Corporate Secretary Synopsys, Inc. 675 Almanor Ave. Sunnyvale, California 94085 (Name and address of agent for service) (650) 584-5000 (Telephone number, including area code, of agent for service) Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-acceleratedfiler, 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-2of 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. ☐

REGISTRATION OF ADDITIONAL SECURITIES

PURSUANT TO GENERAL INSTRUCTION E

Synopsys, Inc. (the “”) is filing this Registration Statement with the Securities and Exchange Commission (the
“”) to register (i)