☒Annual Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal yearendedAugust31, 2025 ☐Transition Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 FACTSET RESEARCH SYSTEMS INC.(Exact name of registrant as specified in its charter) Delaware13-3362547(State or other jurisdiction of incorporation or organization)(I.R.S.EmployerIdentificationNo.) 45 Glover Avenue,Norwalk,Connecticut06850(Address of principal executive offices, including zip code)Registrant’s telephone number, including area code:(203)810-1000Securities registered pursuant to Section 12(b) of the Act: Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is not required to file reports pursuant to Section13 or Section15(d) of the Act.Yeso Nox Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports),and (2)has been subject to such filing requirements for the past 90days.Yesx Noo Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files).Yesx Noo Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reportingcompany" and "emerging growth company" in Rule12b-2 of the Exchange Act. Large accelerated filer☒Non-accelerated filer☐ Accelerated filerSmaller reporting companyEmerging growth company If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.o Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectivenessof its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registeredpublic accounting firm that prepared or issued its audit report.x If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of theregistrant included in the filing reflect the correction of an error to previously issued financial statements.☐ Indicated by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-basedcompensation received by any of the registrant's executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule12b-2 of the Act).Yeso Nox Table of Contents The aggregate market value of the registrant’s common stock held by non-affiliates of the registrant based upon the closing price of ashare of the registrant’s common stock on February28, 2025, the last business day of the registrant’s most recently completed secondfiscal quarter, as reported by the New York Stock Exchange on that date, was $17,509,083,420. As of October15, 2025, there were37,456,326shares of the registrant's common stock outstanding. DOCUMENTS INCORPORATED BY REFERENCE Certain information required by Part III of this Annual Report on Form 10-K is incorporated by reference to our definitive ProxyStatement for our 2025 Annual Meeting of Stockholders, which will be filed with the Securities and Exchange Commission not laterthan 120 days after August31, 2025. Special Note Regarding Forward-Looking Statements This report contains forward-looking statements that express management's current views concerning expectations, estimates, trends,forecasts and projections about future events and circumstances, industries in which FactSet operates and the beliefs and assumptionsof management. These statements may include projections of our future financial performance and anticipated trends in our business.In some cases, you can identify these statements by words such as "may," "might," "will," "should," "expects," "plans," "anticipates,""believes," "estimates," "intends," "projects," "indicates," "predicts," "potential," or "continue," and similar expressions. Statementsconcerning our financial position, business strategy and plans or objectives for future operations are forward-looking statements. Forward-looking statements are not guarantees of future performance and involve a number of risks, uncertainties and assumptions.Factors that could cause our actual results, le