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* Ellis Christopher R (Last) (First) (Middle) 45 GLOVER AVENUE 7TH FLOOR (Street) NORWALK CT 06850 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 11/01/2023	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) EVP, Initiatives & P'ships	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)
Common Stock	22,624.1869(1)	D
Common Stock	450	I	By Spouse

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
Employee Stock Option (right to buy)	(2)	11/03/2024	Common Stock	9,291	131.31	D
Employee Stock Option (right to buy)	(3)	10/16/2025	Common Stock	7,577	165.37	D
Employee Stock Option (right to buy)	(4)	11/02/2025	Common Stock	6,375	175.2	D
Employee Stock Option (right to buy)	(5)	11/01/2026	Common Stock	7,606	152.28	D
Employee Stock Option (right to buy)	(6)	11/02/2027	Common Stock	6,215	189.98	D
Employee Stock Option (right to buy)	(7)	11/01/2028	Common Stock	4,316	221.88	D
Employee Stock Option (right to buy)	(8)	11/01/2029	Common Stock	3,323	255.87	D
Employee Stock Option (right to buy)	(9)	11/09/2030	Common Stock	3,196	316.71	D
Employee Stock Option (right to buy)	(10)	11/01/2031	Common Stock	2,686	434.82	D
Employee Stock Option (right to buy)	(11)	11/01/2032	Common Stock	2,289	426.25	D

Explanation of Responses:

1. Includes 19,700 common shares, 102 restricted stock units granted November 1, 2018 that vest 20% annually on the anniversary date of the grant and are fully vested after five years, and 2,822.1869 shares acquired through the FactSet Research Systems Inc. Employee Stock Purchase Plan.

2. Options were granted on November 3, 2014 and vest 60% on the third anniversary date of the grant and 40% on the fifth anniversary date of the grant.

3. Options were granted on October 16, 2015 and are fully vested.

4. Options were granted on November 2, 2015 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

5. Options were granted on November 1, 2016 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

6. Options were granted on November 2, 2017 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

7. Options were granted on November 1, 2018 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

8. Options were granted on November 1, 2019 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

9. Options were granted on November 9, 2020 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

10. Options were granted on November 1, 2021 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

11. Options were granted on November 1, 2022 and vest ratably at 20% per year over five years upon the anniversary of the date of grant.

Remarks:

	/s/ RACHEL R. STERN, Attorney in Fact for Christopher R. Ellis	11/03/2023
	** 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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