Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 425

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 425
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 meeting of shareholders of the Corporation shall be deemed no longer to be incorporated by
reference into this Prospectus for purposes of future offers and sales of Securities hereunder.

A Prospectus Supplement containing the specific terms of
an offering of Securities thereunder will be delivered to purchasers of such Securities together with this Prospectus (except where an exemption from such delivery requirements is available) and will be deemed to be incorporated by reference into
this Prospectus as of the date of such Prospectus Supplement solely for the purposes of the distribution of the Securities covered by such Prospectus Supplement.

Copies of the documents incorporated herein by reference may be obtained on request without charge from the Corporate Secretary of TransAlta, Suite 1400, 1100
– 1st Street SE, Calgary, Alberta T2G 1B1 (telephone: (403) 267-7110). These documents are also available electronically on SEDAR+ under our profile, which can be accessed at .

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WHERE TO FIND MORE INFORMATION

We have filed with the SEC, under the United States Securities Act of 1933, as amended (the “U.S. Securities Act”), a registration
statement on Form F-10 relating to the Securities. This Prospectus, which constitutes a part of the registration statement, does not contain all of the information contained in the registration statement,
certain items of which are contained in the exhibits to the registration statement as permitted by the rules and regulations of the SEC. Statements included or incorporated by reference in this Prospectus about the contents of any contract,
agreement or other documents referred to are not necessarily complete, and in each instance, you should refer to the exhibits for a complete description of the matter involved. Items of information omitted from this Prospectus but contained in the
registration statement will be available on the SEC’s website at www.sec.gov.

We file certain reports with and furnish other information to the SEC
and securities regulatory authorities in each of the provinces of Canada. Under the multijurisdictional disclosure system adopted by the U.S., documents and other information that we file with the SEC may be prepared in accordance with the
disclosure requirements of Canada, which are different from those of the U.S. You may read and download the documents that we have filed with the SEC on EDGAR at www.sec.gov. You may read and download any public document that the Corporation
has filed with the securities commission or other similar authority in each of the provinces of Canada on SEDAR+ at www