Sec Form 4 Filing - Snow Frederick Philip @ FACTSET RESEARCH SYSTEMS INC - 2023-12-04

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP 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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1. Name and Address of Reporting Person Snow Frederick Philip 2. Issuer Name and Ticker or Trading Symbol FACTSET RESEARCH SYSTEMS INC [ FDS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O FACTSET RESEARCH SYSTEMS INC., 45 GLOVER AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 12/04/2023 (Street) NORWALK, CT06850 4. If Amendment, Date Original Filed (MM/DD/YY) 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 Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/04/2023 M 3,000 A $ 164.9 15,914.9306 D Common Stock 12/04/2023 S( 1 ) 3,000 D $ 452.79 12,914.9306 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Employee Stock Option (right to buy) $ 164.9 12/04/2023 M 3,000 ( 2 ) 07/01/2025 Common Stock 3,000 $ 0 36,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Snow Frederick Philip C/O FACTSET RESEARCH SYSTEMS INC. 45 GLOVER AVENUE NORWALK, CT06850 X Chief Executive Officer Signatures /s/ RACHEL R. STERN, Attorney in Fact for Frederick Philip Snow 12/04/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )This Transaction was effected pursuant to a Rule 10b5-1 Plan adopted by Mr. Snow on April 27, 2023, with an effective date of August 1, 2023, in order to facilitate his exercise of non-qualified stock options. Accordingly, Mr. Snow had no discretion with regard to the timing of the transaction. ( 2 )Options were granted on July 1, 2015, and vest over a nine year period with 11.11% exercisable on each of the first nine anniversaries of the date of grant.

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 4(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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