SEC Form 3

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 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Walsh Peter G (Last) (First) (Middle) FACTSET RESEARCH SYSTEMS INC. 601 MERRITT 7 (Street) NORWALK CT 06851 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 03/01/2005	3. Issuer Name and Ticker or Trading Symbol FACTSET RESEARCH SYSTEMS INC [ FDS ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director 10% Owner X Officer (give title below) Other (specify below) Chief Financial Officer	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

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)
FactSet Common Stock	5,049.186	D

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: 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
FactSet Common Stock	(1)	03/29/2009	FactSet Common Stock	3,000	12.9375	D
FactSet Common Stock	(1)	03/13/2010	FactSet Common Stock	6,000	22.0833	D
FactSet Common Stock	(1)	11/13/2010	FactSet Common Stock	8,215	22.8333	D
FactSet Common Stock	(1)	11/13/2010	FactSet Common Stock	6,784	22.8333	D
FactSet Common Stock	(1)	10/23/2011	FactSet Common Stock	1,860	17.5667	D
FactSet Common Stock	(1)	10/23/2011	FactSet Common Stock	5,640	17.5667	D
FactSet Common Stock	(1)	10/07/2012	FactSet Common Stock	4,950	14.9667	D
FactSet Common Stock	(1)	10/07/2012	FactSet Common Stock	8,550	14.9667	D
FactSet Common Stock	(1)	01/22/2014	FactSet Common Stock	30,000	24.4867	D

Explanation of Responses:

1. 20% of option grant is exercisable one year from grant date. Months 13-60: 1.66% of original grant per month.

	Peter G. Walsh	03/02/2005
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
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