6-K

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

For the month of June 2015

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): ____

I

The document listed below as Exhibit 99.1 to this Form 6-K is a copy of the Registrant’s news release dated June 30, 2015 announcing “Media Advisory: TransAlta Second Quarter 2015 Results and Conference Call.”

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 June 30, 2015 announcing “Media Advisory: TransAlta Second Quarter 2015 Results and Conference Call.”

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/Donald Tremblay

Donald Tremblay

Chief Financial Officer

Date: June 30, 2015

EXHIBIT INDEX

99.1 Press release dated June 30, 2015 announcing “Media Advisory: TransAlta Second Quarter 2015 Results and Conference Call.”

EX-99.1

  Media Advisory

Media Advisory: TransAlta Second Quarter 2015 Results and Conference Call

CALGARY, Alberta (June 30, 2015) – TransAlta Corporation (TSX: TA; NYSE: TAC) will release its second quarter 2015 results before market open on Wednesday, July 29, 2015. A conference call and webcast to discuss the results will be held for investors, analysts, members of the media and other interested parties the same day beginning at 9:00 a.m. Mountain (11:00 a.m. Eastern). The media will be invited to ask questions following analysts.

Please contact the conference operator five minutes prior to the call, noting "TransAlta Corporation" as the company and "Brent Ward" as moderator.

Dial-in numbers:

Toll-free North American participants call: 1-800-319-4610

Outside of Canada & USA call: 1-604-638-5340

A link to the live webcast will be available on the Investor Centre section of TransAlta’s website at http://www.transalta.com/powering-investors/events-and-presentations. If you are unable to participate in the call, the instant replay is accessible at 1-855-669-9658 (Canada and USA toll free) or 1-604-674-8052 (Outside of Canada) with TransAlta pass code 2231 followed by the # sign. A transcript of the broadcast will be posted on TransAlta’s website once it becomes available.

About TransAlta:

TransAlta is a power generation and wholesale marketing company focused on creating long-term shareholder value. TransAlta maintains a low-to-moderate risk profile by operating a highly contracted portfolio of assets in Canada, the United States and Australia. TransAlta’s focus is to efficiently operate wind, hydro, natural gas and coal facilities in order to provide customers with a reliable, low-cost source of power. For over 100 years, TransAlta has been a responsible operator and a proud contributor to the communities in which it works and lives. TransAlta has been selected by Sustainalytics as one of Canada’s Top 50 Socially Responsible Companies since 2009 and is recognized globally for its leadership on sustainability and corporate responsibility standards by FTSE4Good.

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For more information:

Investor inquiries:	Media inquiries:
Brent Ward	Leanne Yohemas
Director, Corporate Finance and Investor Relations	Senior Advisor, External Communications
Phone: 1-800-387-3598 in Canada and U.S.	Phone: Toll-free media number: 1-855-255-9184
Email: investor_relations@transalta.com	Email: ta_media_relations@transalta.com
Jacqueline O’Driscoll
Manager, Investor Relations
Phone: 1-800-387-3598 in Canada and U.S.
Email: investor_relations@transalta.com