Shares of Icos Corp. lost $2.75 on Wednesday, closing at $11,after the company said the Securities and Exchange Commissionhas declared effective a shelf registration for 12.1 millionshares issued or issuable in connection with private placementsin June 1990.

Last summer, the Bothell, Wash., company raised a record $33million in start-up funding.

The registration will be effective until June 7, 1993.

Icos (NASDAQ:ICOS) is developing treatments for chronicinflammatory diseases. The company completed an initialpublic offering in June, selling 4.5 million shares at $8.

(c) 1997 American Health Consultants. All rights reserved.