CALGARY, ALBERTA -- (Marketwired) -- 04/27/15

The Board of Directors of TransAlta Corporation (TSX: TA) (NYSE: TAC) today declared a quarterly dividend of $0.18 per share on common shares payable on July 1, 2015 to shareholders of record at the close of business June 1, 2015.

The Board of Directors of TransAlta Corporation also declared a quarterly dividend of $0.2875 per share on TransAlta's issued and outstanding Cumulative Redeemable Rate Reset First Preferred Shares, Series A, payable on June 30, 2015 to shareholders of record at the close of business June 1, 2015.

The Board of Directors of TransAlta Corporation also declared a quarterly dividend of $0.2875 per share on TransAlta's issued and outstanding Cumulative Redeemable Rate Reset First Preferred Shares, Series C, payable on June 30, 2015 to shareholders of record at the close of business June 1, 2015.

The Board of Directors of TransAlta Corporation also declared a quarterly dividend of $0.3125 per share on TransAlta's issued and outstanding Cumulative Redeemable Rate Reset First Preferred Shares, Series E, payable on June 30, 2015 to shareholders of record at the close of business June 1, 2015.

The Board of Directors of TransAlta Corporation also declared a quarterly dividend of $0.33125 per share on TransAlta's issued and outstanding Cumulative Redeemable Rate Reset First Preferred Shares, Series G, payable on June 30, 2015 to shareholders of record at the close of business June 1, 2015.

All currency is expressed in Canadian dollars except where noted.

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.

Contacts:
Investor inquiries:
Brent Ward
Director, Corporate Finance and Investor Relations
1-800-387-3598 in Canada and U.S.
investor_relations@transalta.com

Jacqueline O'Driscoll
Manager, Investor Relations
1-800-387-3598 in Canada and U.S.
investor_relations@transalta.com

Media inquiries:
Leanne Yohemas
Senior Advisor, External Communications
Cell: 587-437-3660 or Alternate local number: 403-267-2540
Toll-free media number: 1-855-255-9184
ta_media_relations@transalta.com