Company: FORFF
Filing Date: 2025-06-16
Form Type: S-8 POS
Source: 0001104659-25-059694
Chunk: 1

Company: Fortis Inc.
Filing Date: 2025-06-16
Form: S-8 POS
Chunk 1
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 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. ¨

<div align='center'>EXPLANATORY NOTE</div>

This Post-Effective Amendment No. 3 (the
“Amendment”) to that certain Registration Statement No. 333-226663 on Form S-8 filed with the Securities and Exchange Commission (the “ Commission”) on August 8, 2018, as amended by the Post-Effective Amendment No. 1 to the Registration Statement filed with the Commission on September 3, 2019 and the Post-Effective Amendment No. 2 to the Registration Statement filed with the Commission on December 30, 2024 (together, as amended, the “Registration Statement”), is being
filed by Fortis Inc. (the “Registrant”) to amend and supplement Item 3 of the Registration Statement in order to also
incorporate by reference into the Registration Statement (i) the annual report on Form 11-K of the Tucson Electric Power Company 401(k) Plan (the “ Plan”) previously filed by the Plan with the Commission for the fiscal year ended on December 31, 2023,
and (ii) all documents subsequently filed by the Plan after the date hereof pursuant to Sections 13(a), 13(c), 14 and 15(d) of the
Securities Exchange Act of 1934, as amended (the “Exchange Act”).

Except as described herein, this Amendment does
not update, amend or modify any other information, statement or disclosure contained in the Registration Statement.

<div align='center'>PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</div>

Item 3. Incorporation of Documents by Reference.

1. In addition to, and without limiting,
the documents previously incorporated by reference into the Registration Statement, the Registrant and the Plan hereby incorporate by
reference into the Registration Statement each of the following documents:

| (a) | The Registrant’s Annual Report on Form 40-F for the fiscal year ended December 31, 2024 (Commission File No. 001-37915), filed with the Commission on February 14, 2025. |

| (d) | All other reports filed pursuant to Section 13(a) or 15(d) of the Exchange Act since the end of the fiscal year covered by the Registrant