☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIESEXCHANGE ACT OF 1934 For the quarterly period ended March 27, 2026OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIESEXCHANGE ACT OF 1934 For the transition period fromtoCommission File Number 333-48123 The Hackett Group, Inc.(Exact name of registrant as specified in its charter) FLORIDA(State or other jurisdiction ofincorporation or organization)1001 Brickell Bay Drive, Suite 3000Miami, Florida(Address of principal executive offices) (305) 375-8005(Registrant’s telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: 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 Actof 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject tosuch filing requirement for the past 90 days.YES☒NO☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submitsuch files).YES☒NO☐ Indicate by check mark whether registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company,or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerginggrowth company” in Rule 12b-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 complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).YES NO☒Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date. As of May 1, 2026 there were 25,188,887 shares of common stock outstanding. TABLE OF CONTENTS PART I - FINANCIAL INFORMATION Item 1.Financial StatementsConsolidated Balance Sheets as of March 27, 2026(unaudited)and December 26, 20253Consolidated Statements of Operations for the Three Months Ended March 27, 2026, and March 28, 2025,(unaudited)4Consolidated Statements of Comprehensive Income for the Three Months Ended March 27, 2026, and March 28,2025,(unaudited)5Consolidated Statements of Cash Flows for the Three Months Ended March 27, 2026, and March 28, 2025,(unaudited)6Consolidated Statements of Shareholders' Equity for the Three Months Ended March 27, 2026, and March 28, 2025,(unaudited)7Notes to Consolidated Financial Statements (unaudited)8Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations20Item 3.Quantitative and Qualitative Disclosures About Market Risk25Item 4.Controls and Procedures25Item 5.Other Information25PART II - OTHER INFORMATIONItem 1.Legal Proceedings26Item 1A.Risk Factors26Item 2.Unregistered Sales of Equity Securities and Use of Proceeds26Item 6.Exhibits27SIGNATURES28 The Hackett Group, Inc.CONSOLIDATED BALANCE SHEETS(in thousands, except share data)(unaudited) The Hackett Group, Inc.CONSOLIDATED STATEMENTS OF OPERATIONS(in thousands, except per share data)(unaudited) The Hackett Group, Inc.CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME(in thousands)(unaudited) Quarter EndedMarch 27,March 28,20262025Net income$4,281$3,143Foreign currency translation adjustment, net(1,415)952Total comprehensive income$2,866$4,095 The accompanying notes are an integral part of the consolidated financial statements. The Hackett Group, Inc.CONSOLIDATED STATEMENTS OF CASH FLOWS(in thousands)(unaudited) The Hackett Group, Inc.NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(unaudited) 1. Basis of Presentation and General Information Basis of Presentation The accompanying consolidated financial statements of The Hackett Group,Inc. (“Hackett” or the “Company”) have beenprepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and include theCompany’s accounts and those of its wholly-owned subsidiaries which the Company is required to consolidate. All intercompanytransactions and balances have been eliminated in the consolidation. In the opinion of management, the accompanying consolidated financial statements reflect all normal and recurring adjustmentswhich are necessary for a fair presentation of the Company’s financial position, results of operations, and cash flows as of the dates andfor the periods presented. The consolidated financial statements have been prepared pursuant to the rules and regulations of theSecurities and Exchange Commission (“SEC”) regarding interim financial rep