FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   MACKAY MARTIN 2. Date of Event Requiring Statement (Month/Day/Year) 10/04/2007 3. Issuer Name and Ticker or Trading Symbol PFIZER INC [PFE] (Last) (First) (Middle) PFIZER INC. ATT: CORPORATE SECRETARY, 235 EAST 42ND STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior Vice President 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) NEW YORK, NY 10017 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5) Common Stock 109,005 D   Common Stock 7,127 I By Rule 16b-3 Plan

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Option (right to buy)	  (1)	08/26/2008	Common Stock	21,000	$ 35.21	D	Â
Employee Stock Option (right to buy)	  (2)	04/21/2009	Common Stock	84,450	$ 42.07	D	Â
Employee Stock Option (right to buy)	  (3)	02/23/2010	Common Stock	39,600	$ 32.94	D	Â
Employee Stock Option (right to buy)	  (4)	02/21/2011	Common Stock	135,000	$ 45.34	D	Â
Employee Stock Option (right to buy)	  (5)	02/27/2012	Common Stock	65,000	$ 41.3	D	Â
Employee Stock Option (right to buy)	  (6)	02/26/2013	Common Stock	75,000	$ 29.33	D	Â
Employee Stock Option (right to buy)	  (7)	02/25/2014	Common Stock	100,000	$ 37.15	D	Â
Employee Stock Option (right to buy)	  (8)	02/23/2015	Common Stock	100,000	$ 26.2	D	Â
Employee Stock Option (right to buy)	02/23/2009	02/22/2016	Common Stock	120,000	$ 26.2	D	Â
Employee Stock Option (right to buy)	02/22/2010	02/21/2017	Common Stock	120,000	$ 25.87	D	Â
Phantom Stock Units (AIP)	  (9)	  (9)	Common Stock	8,547	$ (10)	D	Â

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
MACKAY MARTIN PFIZER INC. ATT: CORPORATE SECRETARY 235 EAST 42ND STREET NEW YORK, NY 10017	Â	Â	  Senior Vice President	Â

Signatures

By: Lawrence A. Fox, by power of atty.		10/12/2007
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The option became exercisable in 5 equal annual installments beginning on August 28, 1999.
(2)	The option became exercisable in 5 equal annual installments beginning on April 22, 2000.
(3)	The option became exercisable in 5 equal annual installments beginning on February 24, 2001.
(4)	The option became exercisable in 5 equal annual installments beginning on February 22, 2002.
(5)	This option became exercisable in 3 equal annual installments beginning on February 28, 2005.
(6)	This option became exercisable in 3 equal annual installments beginning on February 27, 2006.
(7)	This option became exercisable in 3 equal annual installments beginning on February 26, 2007.
(8)	This option becomes exercisable in 3 equal annual installments beginning on February 24, 2008.
(9)	Units were acquired as the result of the deferral of incentive compensation under the Executive Annual Incentive Plan. Units are settled in cash at a specified later date or upon separation from service.
(10)	Each unit represents one phantom share of common stock.

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