Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 423

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 423
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excluding confidential material change reports) and business acquisition reports that we file with the applicable regulatory authorities after the date of this Prospectus and prior to the termination of the distribution period of this Prospectus shall be deemed to be incorporated by reference into this Prospectus. These documents will be available electronically on the System for Electronic Data Analysis and Retrieval + (“ SEDAR+”), which can be accessed at www.sedarplus.ca. In addition, any similar documents we file with or furnish to the SEC, as applicable, in our current reports on Form 6-Kor annual reports on Form 40-Fand any other documents filed with or furnished to the SEC pursuant to Section 13(a), 13(c) or 15(d) of the United States Securities Exchange Act of 1934, as amended (the “ U.S. Exchange Act”), in each case after the date of this Prospectus and prior to the date on which this Prospectus ceases to be effective, shall be deemed to be incorporated by reference into the registration statement of which this Prospectus forms a part, if and to the extent expressly provided in such reports. To the extent that any document incorporated by reference into this Prospectus is included in a report that is filed with or furnished to the SEC by us on Form 40-F, 20-F, 10-K, 10-Q, 8-Kor 6-K(or any respective successor form), such document shall also be deemed to be incorporated by reference as an exhibit to the registration statement of which this Prospectus forms a part. Our periodic reports on Form 6-Kand our annual reports on Form 40-Fare available on the SEC’s Electronic Data Gathering, Analysis, and Retrieval (“ EDGAR”) system web site at www.sec.gov. - 2 -

Any statement contained in this Prospectus or in a document incorporated or deemed to be incorporated by reference herein shall be deemed to be modified or superseded for the purposes of this Prospectus to the extent that a statement contained herein or in any other subsequently filed document that also is or is deemed to be incorporated by reference herein modifies or supersedes such prior statement. The modifying or superseding statement need not state that it has modified or superseded a prior statement or include any other information set forth in the document that it modifies or supersedes. The making of a modifying or superseding statement is not to be deemed an admission for any purposes that the modified or superseded statement, when made, constituted a misrepresentation, an untrue statement of