TORONTO, ONTARIO -- (MARKET WIRE) -- 06/27/08 -- At the request of the Investment Industry Regulatory Organization of Canada ("IIROC"), on behalf of the Toronto Stock Exchange, Atlantic Power Corporation (TSX: ATP.UN) announces that it is not aware of any corporate developments that would be impacting the trading of its income participating securities.

Atlantic Power Corporation owns interests in a diversified portfolio of 14 power generation projects and one transmission line located in major markets in the United States. Atlantic Power's objectives are to sustain and grow its cash distributions over the long term by enhancing the performance of its existing assets and by making accretive acquisitions.

Contacts:
Atlantic Power Corporation

        Barry Welch
        (617) 977-2700
        Email: info@atlanticpowercorporation.com

Source: Atlantic Power Corporation