6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of February, 2024

Commission File Number: 001-37915

Fortis Inc.

Fortis Place, Suite 11005 Springdale StreetSt. John's, Newfoundland and LabradorCanada, A1E 0E4

(Address of Principal Executive Office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F: Form 20-F ☐ Form 40-F ☑

EXHIBITS

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Exhibit 99.1

St. John's, NL – February 9, 2024

FORTIS INC. FILES 2023 YEAR-END DISCLOSURE DOCUMENTS

This news release constitutes a "Designated News Release"incorporated by reference in the prospectus supplement dated September 19, 2023 to Fortis' short form base shelf prospectus dated November21, 2022.

Fortis Inc. ("Fortis" or the "Corporation") (TSX/NYSE: FTS), today filed its audited Consolidated Financial Statements, related Management Discussion and Analysis and Form 40-F for the year ended December 31, 2023, as well as its 2023 Annual Information Form, with Canadian securities regulatory authorities. The Corporation also filed its Form 40-F for the year ended December 31, 2023 with the U.S. Securities and Exchange Commission. Copies of these documents are available electronically at www.sedarplus.ca (Canadian filings), www.sec.gov (U.S. filings) and the Corporation's website, www.fortisinc.com, or by emailing investorrelations@fortisinc.com.

The Management Information Circular for the Corporation's upcoming Annual Meeting of Shareholders is expected to be made available to shareholders in late March.

About Fortis

Fortis is a well-diversified leader in the North American regulated electric and gas utility industry with 2023 revenue of $12 billion and total assets of $66 billion as at December 31, 2023. The Corporation's 9,600 employees serve utility customers in five Canadian provinces, ten U.S. states and three Caribbean countries.

Fortis shares are listed on the TSX and NYSE and trade under the symbol FTS. Additional information can be accessed at www.fortisinc.com, www.sedarplus.ca, or www.sec.gov.

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