Credit Rating Report

TransAlta Corporation: Rating Report

Utilities & Independent Power

Summary

On April 2, 2018, DBRS Limited (DBRS) confirmed the Issuer Rating and Unsecured Debt/Medium-Term Notes rating of TransAlta Corporation (TAC or the Company) at BBB (low) and TAC’s Preferred Shares rating at Pfd-3 (low). The trends are Stable. DBRS’s rating actions follow a review of TAC’s 2017 financial results, as well as its business strategy and refinancing plan for corporate debt over the medium term. DBRS is of the view that TAC’s current business risk and financial metrics (consolidated and modified consolidated) remain supportive of the current ratings.