To: [Name]
From: [ ]
Date: , 2003
Re: Confirmation of Participation in the Offer to Exchange
Thank you for your participation in Rigel Pharmaceuticals, Inc.'s Stock Option Exchange Program. Defined terms not explicitly defined herein but defined in the Offer Document, shall have the same definitions as used in the Offer Document. The stock option(s) held by you that have been surrendered for cancellation are identified on the following page entitled "Stock Options Cancelled."
If the information on the "Stock Options Cancelled" page is not correct or if you have any questions regarding the Offer, please contact Jim Welch via email at jhwelch@rigel.com or via telephone at (650) 624-1176.
Please note that you may change your previous choice whether to accept or reject the Offer at any time before 11:59 p.m., Pacific Daylight Time, on Friday, July 25, 2003. If we extend the offer to exchange beyond that time, you may change your previous choice at any time until the extended date. To change your election, please complete a Notice of Change in Election Form by following the directions set forth in Section 4 of the Offer to Exchange documents.
| Rigel Pharmaceuticals, Inc. | STOCK OPTIONS CANCELLED |
Name |
ID |
Number |
Grant Date |
Plan |
Cancel Date |
Cancel Reason |
Shares |
Price |
Total Price |
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| TOTALS | ||||||||||||||||||