The shares are listed on the NYSE

Davis Polk advised the forward counterparties in connection with the execution of forward sale agreements on 6,382,978 shares of Ameren Corporation’s common stock in connection with an SEC-registered offering of an equal number of shares. The approximately 6,382,978 shares include 832,562 million shares purchased by the underwriters pursuant to an option to purchase additional shares. In connection with the forward sale agreements, the forward counterparties (or their respective affiliates) borrowed an aggregate of 6,382,978 shares of Ameren Corporation’s common stock from third parties and sold these shares to the underwriters. The net proceeds of the offering (assuming physical settlement of the forward sale agreements at the initial forward sale price) are expected to be approximately $586.5 million.

St. Louis-based Ameren Corporation powers the quality of life for 2.5 million electric customers and more than 900,000 natural gas customers in a 64,000-square-mile area through its Ameren Missouri and Ameren Illinois rate-regulated utility subsidiaries. Ameren Illinois provides electric transmission and distribution service and natural gas distribution service. Ameren Missouri provides electric generation, transmission and distribution services, as well as natural gas distribution service. Ameren Transmission Company of Illinois develops, owns and operates rate-regulated regional electric transmission projects in the Midcontinent Independent System Operator, Inc. Ameren shares are traded on the NYSE under the symbol “AEE.”

The Davis Polk equity derivatives team included partner Mark M. Mendez and associate Alexander S. Pettingell. All members of the Davis Polk team are based in the New York office.