TRANSALTA CORP

Foreign Filer Report • May 23, 2013

6-K 1 transalta6k05232013.htm TRANSALTA CORPORATION 6-K CT Filed by Filing Services Canada Inc. 403-717-3898

FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

For the month of May, 2013

TRANSALTA CORPORATION

(Translation of registrant’s name into English)

110-12 th Avenue S.W., Box 1900, Station “M”, Calgary, Alberta, T2P 2M1

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F____ Form 40-F X

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ____

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _____ No X

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-__

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I

The document listed below as Exhibit 99.1 to this Form 6-K is a copy of the Registrant’s news release dated May 23, 2013. This news release is being furnished, not filed, and will not be incorporated by reference into any registration statement filed by TransAlta Corporation under the Securities Act of 1933, as amended.

99.1 Press release dated May 23, 2013 announcing “TRANSALTA UPDATES RETURN-TO-SERVICE DATES FOR KEEPHILLS 1 AND SUNDANCE 1 POWER PLANTS”

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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
By: /s/Maryse St.-Laurent

Maryse St.-Laurent
Vice-President and Corporate Secretary

Date: May 23, 2013

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EXHIBIT INDEX

99.1 Press release dated May 23, 2013 announcing “TRANSALTA UPDATES RETURN-TO-SERVICE DATES FOR KEEPHILLS 1 AND SUNDANCE 1 POWER PLANTS”