Company: SREA
Filing Date: 2025-02-26
Form Type: S-8
Source: 0001193125-25-036757
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Company: SEMPRA
Filing Date: 2025-02-26
Form: S-8
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As filed with the Securities and Exchange Commission on February 26, 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 SEMPRA (Exact name of registrant as specified in its charter)

| California                        |     | 33-0732627         |
| (State or other jurisdiction      
 of incorporation or organization) |     | -I.R.S. Employer   
 Identification No. |

488 8 thAvenue San Diego, California 92101 (Address of principal executive offices, including zip code) Sempra Savings Plan San Diego Gas & Electric Company Savings Plan Southern California Gas Company Retirement Savings Plan (Full title of the plans) James M. Spira, Esq. Associate General Counsel Sempra 488 8th Avenue San Diego, California 92101 (Name and address of agent for service) (619) 696-2000 (Telephone number, including area code, of agent for service) Copies to: Michael E. Sullivan, Esq. Latham & Watkins LLP 12670 High Bluff Drive San Diego, California 92130 (858) 523-5400 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. ☐

EXPLANATORY NOTE This Registration Statement on Form S-8registers an additional 1,500,000 shares of the common stock, no par value, of Sempra (the “Common Stock,”) for issuance under the Sempra Savings Plan,