Wyeth Transaction

Important Information for Investors

Effective October 15, 2009 Pfizer Inc. acquired Wyeth in a cash and stock merger. Pursuant to the terms of the merger, Wyeth holders will receive 0.985 of a share of Pfizer Inc. common stock and $33.00, without interest for every 1 share of Wyeth common stock they own as of the effective date. Former Wyeth holders should direct any inquiries to Computershare Trust Company, N.A, Pfizer's exchange agent, at +1 877.745.9320 or +1 781.575.4336.

Key Merger Documents

• Read about the U.S. Federal Tax Consequences of the Merger
• View the Wyeth Proxy / Prospectus for Additional Information about the Pfizer / Wyeth Transaction
• Review Answers to Frequently Asked Questions, Including Tax Information