IN WITNESS WHEREOF, this Plan has been executed as of the 23rd day of December, 2005 by each of the parties hereto. AMERICAN STOCK EXCHANGE LLC By: Title BOSTON STOCK EXCHANGE, INC. By: Title CHICAGO BOARD OPTIONS EXCHANGE, INC. By: Title INTERNATIONAL SECURITIES EXCHANGE, INC. By: Title PACIFIC EXCHANGE, INC. By: Title PHILADELPHIA STOCK EXCHANGE, INC. By: Title 11 .