Exhibit 4.2 NORTHWEST BIOTHERAPEUTICS, INC. STOCKHOLDER RIGHTS AGREEMENT THIS STOCKHOLDER RIGHTS AGREEMENT is dated as of February 26, 2002 (this "Rights Agreement"), and is between Northwest Biotherapeutics, Inc., a Delaware corporation ("NWBio") and...Stockholder Rights Agreement • July 8th, 2002 • Northwest Biotherapeutics Inc • Pharmaceutical preparations • Delaware
