FORM OF UNDERWRITING AGREEMENT AMERICAN CAPITAL AGENCY CORP. (a Delaware corporation) Shares of Common StockForm of Underwriting Agreement • July 8th, 2009 • American Capital Agency Corp • Real estate investment trusts • New York
American Capital Agency Corp., a Delaware corporation (the “Company”), and the persons listed in Schedule B hereto (the “Selling Stockholders”), confirm their respective agreements with the Underwriters named in Schedule A hereto (collectively, the “Underwriters,” which term shall also include any underwriter substituted as hereinafter provided in Section 10 hereof), for whom are acting as representatives (in such capacity, the “Representatives”), with respect to (i) the sale by the Company and the Selling Stockholders, acting severally and not jointly, and the purchase by the Underwriters, acting severally and not jointly, of the respective numbers of shares of Common Stock, par value $0.01 per share, of the Company (“Common Stock”) set forth in Schedules A and B hereto, and (ii) the grant by the Company and the Selling Stockholders to the Underwriters, acting severally and not jointly, of the option described in Section 2(b) hereof to purchase all or any part of additional shares of
