Company Update

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 14, 2023 (April 14, 2023) PEOPLES BANCORP INC. (Exact name of Registrant as specified in its charter) Ohio 000-16772 31-0987416 (State or other jurisdiction (Commission File (I.R.S. Employer of incorporation) Number) Identification Number) 138 Putnam Street, PO Box 738 Marietta, Ohio 45750-0738 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: (740) 373-3155 Not applicable (Former name or former address, if changed since last report) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common shares, without par value PEBO The Nasdaq Stock Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 8.01 Other Events On April 14, 2023, Peoples Bancorp Inc. (“Peoples”), parent company of Peoples Bank, issued a press release announcing that it has received all necessary regulatory approvals for the merger between Peoples and Limestone Bancorp, Inc. (“Limestone”), with Peoples as the surviving corporation (the “Merger”), and for the merger between Peoples Bank and Limestone’s wholly owned subsidiary, Limestone Bank, Inc., with Peoples Bank as the surviving bank. The Agreement and Plan of Merger dated as of October 24, 2022, by and between Peoples and Limestone, was approved by each of Peoples’ and Limestone’s shareholders, respectively, on February 23, 2023. A copy of the press release is attached hereto as Exhibit 99 and is incorporated herein by reference. Item 9.01      Financial Statements and Exhibits a) - c) Not applicable d) Exhibits See Index to Exhibits below. INDEX TO EXHIBITS Exhibit Number Description 99 News Release issued by Peoples Bancorp Inc. on April 14, 2023 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. PEOPLES BANCORP INC. Date: April 14, 2023 By:/s/ KATIE BAILEY Katie Bailey Executive Vice President, Chief Financial Officer and Treasurer