FORM 10-Q (Mark One) QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2026 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-07120 HARTE HANKS, INC.(Exact name of registrant as specified in its charter) 74-1677284 (I.R.S. Employer None(Former name, former address and former fiscal year, if changed since last report) 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 SecuritiesExchange Act of 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 to such filing requirements for the past 90 days. YesNo 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 (Section 232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files). YesNo Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reportingcompany,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filerAccelerated filerNon-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. Indicate by check mark if the registrant is a shell company (as defined in Rule 12b-2 of the Act). YesNoThe number of shares outstanding of the issuer’s common stock as of April30, 2026 was 7,419,470 shares. HARTE HANKS, INC. AND SUBSIDIARIESTABLE OF CONTENTSFORM 10-Q REPORTFor the Quarterly Period Ended March 31, 2026 Harte Hanks, Inc. and SubsidiariesNotes to Condensed Consolidated Financial Statements (Unaudited) Note A -Overview and Significant Accounting Policies Background Harte Hanks, Inc. together with its wholly-owned subsidiaries (“Harte Hanks,” “Company,” “we,” “our,” or “us”), is a leading globalcustomer experience company. With offices in North America, Asia-Pacific and Europe, Harte Hanks works with some of the world’s mostrespected brands. Segment Reporting The Company operates three reportable segments: Revenue Solutions; Customer Care; and Fulfillment & Logistics Services. Our President isconsidered to be our chief operating decision maker (CODM). Our President reviews our operating results on an aggregate basis for purposesof allocating resources and evaluating financial performance by using the three financial measures: revenue, operating income and operatingincome plus depreciation and amortization (EBITDA). Accounting Principles Our unaudited interim condensed consolidated financial statements and accompanying notes are prepared in accordance with accountingprinciples generally accepted in the United States of America (“GAAP”). In the opinion of management, the unaudited interim condensedconsolidated financial statements reflect all adjustments of a normal recurring nature that are necessary for a fair presentation of the resultsfor the interim periods presented. Interim results are not necessarily indicative of results for a full year. The information included in this Form10-Q should be read in conjunction with information included in our Annual Report on Form 10-K for the fiscal year ended December31,2025 (the “2025 10-K”). Consolidation The accompanying unaudited interim condensed consolidated financial statements include the accounts of Harte Hanks, Inc. and its wholly-owned subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. As used in this report, the terms“Harte Hanks,” “the Company,” “we,” “us,” or “our” may refer to Harte Hanks, Inc., one or more of its consolidated subsidiaries, or all ofthem taken as a whole, as the context may require. Interim Financial Information The condensed consolidated financial statements have been prepared in accordance with U.S. GAAP for interim financial information andwith the instructions to Form 10-Q and Rule 8-01 of Regulation S-X. Accordingly, they do not include all the information and footnotesrequired by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurringadjustments) considered necessary for a fair presentation have been included. Use of Estimates Preparation of consolidated financial statements in conformity with U.S. GAA