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 December, 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 – December 23, 2024

FORTIS INC. ANNOUNCES CHANGES TO ITS BOARD OF DIRECTORS

This news release constitutes a "Designated News Release"incorporated by reference in the prospectus supplement dated December 9, 2024 to Fortis' short form base shelf prospectus dated December9, 2024.

Fortis Inc. ("Fortis" or the "Corporation") (TSX/NYSE: FTS) today announced changes to its Board of Directors. The Board has accepted Ms. Lisa Crutchfield’s resignation as a director of the Corporation effective December 31, 2024, and appointed Gregory Knight to fill the vacancy effective January 1, 2025.

"It has been a privilege to serve on the Fortis Board of Directors and I wish the management team and Board much continued success in the future," said Ms. Crutchfield.

Mr. Knight has extensive executive utility experience, most recently as the Executive Vice President, Customer Transformation and Business Services with CenterPoint Energy, Inc., and the Chief Customer Officer with National Grid USA Service Company, Inc.

"We are thrilled to have Gregg join our Board. His extensive experience in our sector, particularly in customer-focused leadership roles, will further strengthen the quality of our leading board practices," said Jo Mark Zurel, Chair of the Board of Fortis. "We wish Lisa the best of luck in her future endeavours."

The Board and Fortis thank Ms. Crutchfield for her service and look forward to working with Mr. Knight.

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 $70 billion as at September 30, 2024. 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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