X0202 4 2004-07-27 0 0000903129 AMERIGON INC ARGN 0001044321 MARXE AUSTIN W & GREENHOUSE DAVID M 153 E 53RD ST 55TH FL NEW YORK NY 10022 0 0 1 0 Common Stock 2004-07-27 4 P 0 838600 2 A 2329800 I By Limited Partnerships Warrants 2 2004-07-27 4 S 0 838600 2 D 2002-02-25 2007-02-25 Common Stock 838600 0 I By Limited Partnershps February 25, 2007 expiration date was called on July 28, 2004. Exercised warrants to purchased common stock. 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. 722,250 shares of Common Stock are held by Cayman, 1,246,550 shares of Common Stock held by PE, 59,515 shares of Common Stock are held by Tech and 301,485 shares of Common Stock held by Tech II. 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. Austin W. Marxe 2004-07-29 David M. Greenhouse 2004-07-29