FDS: Leadership change

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers On September 23, 2026, the Board of Directors (the “Board”) of FactSet Research Systems Inc. (“FactSet” or the “Company”) appointed Marcel Prins a director of the Company. There are no arrangements or understandings between Mr. Prins and any other persons pursuant to which Mr. Prins was selected as director. Mr. Prins is not a party to any related party transaction, or proposed transaction, required to be disclosed pursuant to Item 404(a) of Regulation S-K. As a non-employee director, Mr. Prins will participate in the Company’s existing director compensation program, the terms of which are described in the Company’s Proxy Statement filed with the U.S. Securities and Exchange Commission on October 27, 2025. A copy of the press release, dated September 25, 2026, announcing the election of Mr. Prins is included as Exhibit 99.1 to this Current Report on Form 8-K. All information in the press release is furnished but not filed. Item 9.01 Financial Statements and Exhibits (d) Exhibits Exhibit No. Description 99.1 Press Release of FactSet Research Systems Inc., dated September 25, 2026 104 Cover page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101) SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. FACTSET RESEARCH SYSTEMS INC. (Registrant) September 25, 2026 By: /s/ JOSHUA WARREN Joshua Warren Executive Vice President, Chief Financial Officer (Principal Financial Officer)