☒ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2025 ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 SPROUT SOCIAL, INC. (Exact name of registrant as specified in its charter)__________________________________ Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes☐No☒ Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during thepreceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for thepast 90 days. Yes☒No☐ Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of RegulationS-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the Registrant was required to submit such files). Yes☒No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerginggrowth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 ofthe Exchange Act. Accelerated filer☐ Smaller reporting company☐ If an emerging growth company, that prepares its financial statements in accordance with U.S. GAAP, indicate by check mark if the registrant has elected not touse the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the SecuritiesAct.☐ Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control overfinancial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its auditreport.☒ If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflectthe correction of an error to previously issued financial statements.☐ Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by anyof 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 Rule 12b-2 of the Exchange Act):☐Yes☒No As of June 30, 2025, the last business day of the registrant’s most recently completed second fiscal quarter, the aggregate market value of the stock held by non-affiliates was approximately $1.1 billion. As of February 20, 2026, there were 53,690,940 shares and 5,869,357 shares of the registrant’s Class A and Class B common stock, respectively, $0.0001 parvalue per share, outstanding. DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant’s Definitive Proxy Statement for its 2026 Annual Meeting of Stockholders, which is expected to be held on May 20, 2026, are incorporatedby reference into Part III of this Annual Report on Form 10-K where indicated. Such Definitive Proxy Statement will be filed with the Securities and ExchangeCommission within 120 days after the end of the registrant’s fiscal year ended December 31, 2025. TABLE OF CONTENTS Page Cautionary Note Regarding Forward-Looking Statements.........................................2Market and Industry Data.................................................................................................4Certain Defined Terms......................................................................................................5Part IItem 1.Business..............................................................................................................................6Item 1A.Risk Factors........................................................................................................................27Item 1B.Unresolved Staff Comments............................................................................................64Item 1C.Cybersecurity......................................................................................................................64Item 2.Properties............................................................................................................................66Item 3.Legal Proceedings.............................................................................................................66Item 4.Mine Safety Disclosures...................................................................................................6