TransAlta Corp 2025年度报告

FORM40-F [Check one]☐REGISTRATION STATEMENT PURSUANT TO SECTION12 OF THE SECURITIES EXCHANGE ACT OF1934 OR☒ANNUAL REPORT PURSUANT TO SECTION13(a)OR 15(d)OF THE SECURITIES EXCHANGE ACT OF1934 001-15214 TRANSALTA CORPORATION(Exact name of Registrant as specified in its charter) Not applicable(Translation of Registrant’s name into English (if applicable)) Canada(Province or other jurisdiction of incorporation or organization) 4911(Primary Standard Industrial Classification Code Number (if applicable)) Not Applicable(I.R.S Employer Identification Number (if applicable)) 1400, 1100 - 1st Street S.E.,Calgary, Alberta, Canada, T2G 1B1,(403) 267-7110(Address and telephone number of Registrant’s principal executive offices) TransAlta Centralia Generation LLC913 Big Hanaford Road, Centralia, Washington 98531, (360) 736-9901(Name, address (including zip code) and telephone number (including area code)of agent for service in the United States) Securities registered or to be registered pursuant to Section12(b)of the Act: Securities registered or to be registered pursuant to Section12(g)of the Act: None Securities for which there is a reporting obligation pursuant to Section15(d)of the Act: Debt Securities For annual reports, indicate by check mark the information filed with this form: ☒Audited annual financial statements ☒Annual information form Indicate the number of outstanding shares of each of the issuer’s classes of capital or common stock as of theclose of the period covered by the annual report: At Dec. 31, 2025, 296,717,495 common shares were issued and outstanding. Indicate by check mark whether the Registrant (1)has filed all reports required to be filed by Section13 or15(d)of the Exchange Act during the preceding 12 months (or for such shorter period that the Registrant wasrequired to file such reports) and (2)has been subject to such filing requirements for the past 90 days. YesNo Indicate by check mark whether the registrant has submitted electronically every Interactive Data File requiredto be submitted pursuant to Rule405 of Regulation S-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the Registrant was required to submit such files). Yes No Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 12b-2 of theExchange Act. Emerging growth company☐ If an emerging growth company that prepares its financial statements in accordance with U.S. GAAP, indicateby check mark if the registrant has elected not to use the extended transition period for complying with any newor revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. †The term “new or revised financial accounting standard” refers to any update issued by the FinancialAccounting Standards Board to its Accounting Standards Codification after April 5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to its management’sassessment of the effectiveness of its internal control over financial reporting under Section 404(b) of theSarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued itsaudit report. If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financialstatementsof the registrant included in the filing reflect the correction of an error to previously issued financialstatements. Indicate by check mark whether any of those error corrections are restatements that require a recoveryanalysis of incentive-based compensation received by an of the registrant's executive officers during therelevant recovery period pursuant to §240.10D-1(b). INCORPORATION BY REFERENCE This annual report on Form40-F, including the exhibits hereto, are incorporated by reference into the followingregistration statements of TransAlta Corporation ("TransAlta" or the "Company") under the Securities Act of1933, as amended. FormRegistration No.S-8333-72454S-8333-101470S-8333-236894S-8333-260935F-10333-292019 CONSOLIDATED AUDITED ANNUAL FINANCIAL STATEMENTSAND MANAGEMENT’S DISCUSSION& ANALYSIS A.Consolidated Audited Annual Financial Statements For consolidated audited annual financial statements for the year ended Dec. 31, 2025, including the report ofthe independent registered public accounting firm with respect thereto, see Exhibit99.3 incorporated byreference herein. B.Management’s Discussion and Analysis For management’s discussion and analysis, see Exhibit99.2 incorporated by reference herein. DISCLOSURE CONTROLS AND PROCEDURES As required by Rule 13a-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”),management has evaluated, with the participation of our Chief Executive Officer and Chief Financial Officer,the effectiveness of our disclosure controls and procedures as of the end of the period covered by this report.Disclosure controls and procedures re