X0201 5 2003-12-16 0 0 0 0000877931 ARTISOFT INC ASFT 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2003-12-16 5 J 0 37768 0 A 1991928 I By Limited Partnerships Warrants 4 2003-12-16 5 J 0 37768 0 A 2003-12-16 2008-12-16 Common Stock 37768 997768 I By Limited Partnerships Additional shares received from company as settlement for late filing of their registration statement. This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Cayman Fund, L.P. (Cayman), Special Situations Private Equity Fund, LP (PE), Special Situations Technology Fund, L.P. (Tech) and Special Situations Technology II, L.P. (Tech II), respectively. 261,515 shares of CS, 380,000 PS convertible into 464,444 and 394,952 Wts to purchase 78,283 CS are owned by Cayman, 239,131 shares of CS, 380,000 PS convertible into 464,444 CS, 394,952 Wts to purchase 78,283 CS are owned by PE, 19,670 shares of CS, 32,730 shares of PS convertible into 40,003 CS, 34,018 Wts to purchase 6,743 CS, and 100, 517 shares of CS, 162,270 PS convertible into 204,441 CS and 173,846 Wts to purchase 34,453 CS. The interest of Marxe and Greenhouse in the shares of Common Stock owned by Cayman, PE, Tech, and Tech II is limited to the extent of his pecuniary interest. 997,768 Warrants are exercisable for 197,762 Common Shares. Austin W. Marxe 2004-03-15 David M. Greenhouse 2004-03-15