¿ Corixa Corp., of Seattle, said the overallotment option of its recent follow-on public offering of 1.9 million shares was exercised. The company sold 100,000 shares of common stock at $32 per share for additional proceeds of $3.2 million. The proceeds will go to four selling stockholders. The company raised $60.8 million through a public offering completed last month. (See BioWorld Today, April 10, 2000, p. 1.)