March 26 (Reuters) - TransAlta Corp TA.TO :
* COVE KEY BLUESCAPE HOLDINGS LP ANNOUNCES CHANGES TO EARLY WARNING REPORT REGARDING TRANSALTA CORPORATION
* COVE KEY - COOPERATING PARTIES HAVE HAD INSUFFICIENT TIME TO FULLY EVALUATE BROOKFIELD INVESTMENT AGREEMENT
* COVE KEY BLUESCAPE - BELIEVE TRANSACTIONS SUPERIOR TO TRANSALTA-BROOKFIELD INVESTMENT AGREEMENT MAY BE AVAILABLE
* COVE KEY -CO, MANGROVE PARTNERS, BLUSCAPE ENERGY PARTNERS HAVE NOT YET DETERMINED WHETHER THEY WILL SOLICIT PROXIES FOR ELECTION OF NOMINEES
* COVE KEY BLUESCAPE - HAS OWNERSHIP AND CONTROL OF APPROXIMATELY 2.95% OF ISSUED AND OUTSTANDING COMMON SHARES OF TRANSALTA