(Mark One)[ X ] ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December31, 2025 OR [ ] TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ___________________ to ___________________ Commission File Number: 001-38487 A. Full title of the plan and the address of the plan, if different from that of the issuer named below:EMPLOYEE RETIREMENT PLAN B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office:ORIGIN BANCORP, INC.500 SOUTH SERVICE ROAD EAST Table of Contents Report of Independent Registered Public Accounting Firm Plan Administrator, Plan Participants, and Retirement CommitteeOrigin Bancorp, Inc. Employee Retirement Plan Opinion on the Financial Statements We have audited the accompanying statements of net assets available for benefits of Origin Bancorp, Inc. Employee Retirement Plan(the “Plan”) as of December 31, 2025 and 2024, the related statements of changes in net assets available for benefits for the years thenended, and the related notes (collectively referred to as the “financial statements”). In our opinion, the financial statements referred toabove present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2025 and 2024, and the Basis of Opinion These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on thesefinancial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (“PCAOB”) and arerequired to be independent with respect to the Plan in accordance with the U.S. federal securities laws and the applicable rules andregulations of the Securities and Exchange Commission and the PCAOB. We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the auditsto obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.The Plan is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part ofour audits, we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due toerror or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidenceregarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles usedand significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe Report on Supplemental Information The supplemental information in the accompanying Schedule H, Line 4i – Schedule of Assets (Held at End of Year) has been subjectedto audit procedures performed in conjunction with the audit of the Plan’s financial statements. The supplemental schedule is theresponsibility of the Plan’s management. Our audit procedures included determining whether the supplemental schedule reconciles tothe financial statements or the underlying accounting and other records, as applicable, and performing procedures to test thecompleteness and accuracy of the information presented in the supplemental schedule. In forming our opinion on the supplemental /s/ Forvis Mazars, LLP We have served as the Plan’s auditor since 2016. Rogers, ArkansasJune25, 2026 ORIGIN BANCORP, INC.EMPLOYEE RETIREMENT PLANStatements of Net Assets Available for BenefitsDecember31, 2025 and 2024 ORIGIN BANCORP, INC.EMPLOYEE RETIREMENT PLANStatements of Changes in Net Assets Available for Benefits ORIGIN BANCORP, INC.EMPLOYEE RETIREMENT PLANNotes to Financial StatementsDecember31, 2025 and 2024 Note 1 — Plan Description and Basis of Presentation The following summary description of the Origin Bancorp, Inc. Employee Retirement Plan (the “Plan”) is provided forgeneral information purposes only. Participants should refer to the Plan document for complete information about the Plan. General Origin Bancorp, Inc. (the “Company” or the “Plan Sponsor”) established the Plan effective as of January 1, 1992, which hasbeen subsequently amended to ensure continued compliance with Section 401(k) of the Internal Revenue Code (“IRC”) of 1986, asamended. The Plan is a defined contribution plan. The Plan is subject to the applicable provisions of the Employee Retirement Income Eligibility Employees of the Company and its wholly owned subsidiaries are generally eligible to participate in the Plan as of the firstday of the following month after being employed for 25 days and meeting certain other requ