X0202 4/A 2006-12-20 2006-12-22 0 0001031833 SPACEDEV INC SPDV 0001309459 Benson Susan C 9208 CHRISTOPHER STREET FAIRFAX VA 22031 0 0 1 0 Common Stock 2006-12-20 4 S 0 5000 0.85 D 5650494 D Includes 497,413 shares held by Space Development Institute, currently reported by Susan C. Benson as being indirectly beneficially owned by her and are subject to limitations on the voting and disposition without the consent of James W. Benson. Includes 2,692,294 shares held jointly by Susan C. Benson and James W. Benson, currently being shown as indirectly beneficially owned by Ms. Benson which are subject to limitations on the voting and disposition without the consent of James W. Benson. Susan C. Benson 2007-01-03