FORM10-Q (Mark One) ☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934For the quarterly period endedMarch31, 2025 OR☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period fromto Commission file number1-9924 CitigroupInc.(Exact name of registrant as specified in its charter) Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934 formatted in Inline XBRL: See Exhibit 99.01 Indicate by check mark whether the registrant (1)has filed all reports required to be filed by Section13 or 15(d) of the Securities Exchange Act of1934 during the preceding 12months (or for such shorter period that the registrant was required to file such reports), and (2)has been subject tosuch filing requirements for the past 90days.Yes☒No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant toRule405 of RegulationS-T (§232.405 of this chapter) during the preceding 12months (or for such shorter period that the registrant was requiredto 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 reportingcompany, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and“emerging growth company” in Rule12b-2 of the Exchange Act. If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying withany new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Number of shares of Citigroup Inc. common stock outstanding on March31, 2025:1,867,733,680 Available online at www.citigroup.com This page intentionally left blank. Non-GAAP Financial MeasuresCiti prepares its financial statements in accordance with U.S. OVERVIEW generally accepted accounting principles (GAAP) and alsopresents certain non-GAAP financial measures (non-GAAPmeasures) that exclude certain items or otherwise includecomponents that differ from the most directly comparablemeasures calculated in accordance with U.S. GAAP. These non-GAAP measures are not intended to be a substitute for GAAPfinancial measures and may not be defined or calculated thesame way as non-GAAP measures with similar names used byother companies.Citi’s non-GAAP measures in this Form 10-Q include: This Quarterly Report on Form 10-Q should be read inconjunction with Citigroup’s Annual Report on Form 10-K forthe year ended December 31, 2024 (referred to herein as Citi’s2024 Form 10-K).Throughout this report, “Citigroup,” “Citi” and “the Company” refer to Citigroup Inc. and its consolidatedsubsidiaries. All “Note” references correspond to the Notes tothe Consolidated Financial Statements herein, unless otherwiseindicated.For a list of certain terms and acronyms used in this Quarterly Report on Form 10-Q and other Citigrouppresentations, see “Glossary of Terms and Acronyms” at the endof this report. •Expenses excluding the Federal Deposit InsuranceCorporation (FDIC) special assessment and/or divestiture-related impacts•All Other(managed basis), which excludes divestiture-related impacts•Revenues excluding divestiture-related impacts•Bankingand Corporate Lending revenues excluding gain(loss) on loan hedges•Tangible common equity (TCE), return on tangible commonequity (RoTCE) and tangible book value per share (TBVPS)•Non-Marketsnet interest income Additional InformationAdditional information about Citigroup is available on Citi’s website at www.citigroup.com. Citigroup’s annual reports onForm 10-K, quarterly reports on Form 10-Q, current reports onForm 8-K and proxy statements, as well as other filings with theU.S. Securities and Exchange Commission (SEC) are availablefree of charge through Citi’s website by clicking on “SECFilings” under the “Investors” tab. The SEC’s website alsocontains these filings and other information regarding Citi atwww.sec.gov.Certain reclassifications have been made to the prior For more information on the FDIC special assessment, see“Executive Summary” and Note 17 below. Citi believes itsresults excluding the FDIC special assessment are useful toinvestors, industry analysts and others in evaluating Citi’s resultsof operations and comparing its operational performancebetween periods, by providing a meaningful depiction of theunderlying fundamentals of period-to-period operating results,particularly given the outsized impact of this item, as well asadditional comparability to peer companies.Citi’s revenues and expenses excluding divestiture-related periods’ financial statements and disclosures to conform to thecurrent period’s presentation, including, effective January 1,2025, certain transaction processing fees paid by Citi, primarilyto credit card networks,