TAC 6-K
Transalta Corp (TAC)
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934
For the month of December 2025
Commission File Number: 001-15214
TransAlta Corporation
(Translation of registrant’s name into English)
Suite 1400, 1100—1st Street S.E., Calgary, Alberta, T2G 1B1
(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 ☒
INCORPORATION BY REFERENCE
Exhibit 99.1 of this Form 6-K is incorporated by reference as an additional exhibit to the registrant’s Registration Statement on Form F-10 (File No. 333-292019).
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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.
| TransAlta Corporation | ||||||
| (Registrant) | ||||||
| Date: December 11, 2025 | /s/ Kelly Galloway | |||||
| Kelly Galloway | ||||||
| Corporate Secretary | ||||||
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Exhibit 99.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the reference to our firm under the caption “Experts” in the Prospectus Supplement, dated December 11, 2025, to the Registration Statement (Form F-10) and related short form base shelf prospectus of TransAlta Corporation (the “Corporation”) for the offering of senior notes and to the inclusion therein of our reports dated February 19, 2025 with respect to the consolidated financial statements of the Corporation as of December 31, 2024 and 2023 and for each of the three years in the period ended December 31, 2024, and with respect to the effectiveness of internal control over financial reporting as of December 31, 2024 included in the Corporation’s Annual Report on Form 40-F filed with the Securities and Exchange Commission.
| December 11, 2025 | ||
| Calgary, Canada | /s/ Ernst & Young LLP | |
| Chartered Professional Accountants | ||