X0202 4 2007-03-05 0 0000766701 CAPSTEAD MORTGAGE CORP CMO 0001227321 REINSCH PHILLIP A 8401 N. CENTRAL EXPRESSWAY SUITE 800 DALLAS TX 75225 0 1 0 0 Executive Vice President Series B Convertible Preferred 2007-03-05 4 P 0 800 12.784 A Common Stock 478 2500 I by Spouse Series B Convertible Preferred Common Stock 1743.72 3000 D The Capstead $1.26 Cumulative Convertible Preferred Stock, Series B, is traded on the New York Stock exchange under the symbol CMOPRB. The preferred stock is perpetual and is convertible into the Capstead common stock at any time at the stockholder's option. The preferred stock is callable at the option of the company at $12.50 per share and an exercise date and price are not applicable. Phillip A. Reinsch 2007-03-07