Report of Foreign Issuer (6-k)

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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

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For the month of May 2019
Commission File Number 001-15214

TRANSALTA CORPORATION
(Translation of registrant's name into English)

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110-12th Avenue S.W., Box 1900, Station “M”, Calgary, Alberta, Canada, T2P 2M1
(Address of principal executive offices)

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  ☑

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). _____

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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/ Scott Jeffers
		Name:	Scott Jeffers
		Title:	Corporate Secretary

Date: May 23, 2019

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EXHIBIT INDEX

Exhibit Number		Description of Document
99.1		Exchange and Option Agreement between Eagle Hydro II LP and TransAlta Corporation, dated as of May 1, 2019
99.2		Registration Rights Agreement between TransAlta Corporation and Eagle Hydro II LP, dated as of May 1, 2019
99.3		Unsecured Subordinated Debenture of TransAlta Corporation, dated as of May 1, 2019

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