pebo-20260721 0000318300 FALSE 0000318300 2026-07-21 2026-07-21 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): July 21, 2026 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: T 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. ☐ 1 Item 2.02 Results of Operation and Financial Condition. On July 21, 2026, Peoples Bancorp Inc. ("Peoples") issued a news release regarding its financial results for the second quarter of 2026.  A copy of the news release is attached as Exhibit 99.1 to this Current Report on Form 8-K. Peoples also provided electronic presentation slides that will be used in connection with its conference call to discuss earnings. A copy of the electronic slides is attached as Exhibit 99.2 to this Current Report on Form 8-K. Conference Call to Discuss Earnings: Peoples will conduct a facilitated conference call to discuss second quarter of 2026 results of operations today at 11:00 a.m., Eastern Daylight Time, with members of Peoples' executive management participating. Analysts, media and individual investors are invited to participate in the conference call by calling (866) 890-9285. A simultaneous webcast of the conference call audio and earnings call presentation will be available online via the “Investor Relations” section of Peoples' website, www.peoplesbancorp.com.  Participants are encouraged to call or sign in at least 15 minutes prior to the scheduled conference call time to ensure participation and, if required, to download and install the necessary software. A replay of the call will be available on Peoples' website in the “Investor Relations” section for one year. Item 8.01 Other Events Declaration of Dividend: On July 21, 2026, Peoples issued a news release announcing that the Board of Directors declared a quarterly dividend of $0.42 per common share on July 20, 2026. A copy of the news release is included as Exhibit 99.3 to this Current Report on Form 8-K. Item 9.01 Financial Statements and Exhibits a) Financial statements of businesses acquired No response required. b) Pro forma financial information No response required. c) Exhibits See Index to Exhibits on Page 3. 2 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: July 21, 2026 By:/s/ KATIE BAILEY Katie Bailey Executive Vice President, Chief Financial Officer and Treasurer 3 INDEX TO EXHIBITS Exhibit Number Description 99.1 Earnings News Release issued by Peoples Bancorp Inc. on July 21, 2026 99.2 Presentation slides furnished by Peoples Bancorp Inc. on July 21, 2026 99.3 Dividend News Release issued by Peoples Bancorp Inc. on July 21, 2026 104 Cover Page Interactive Data File (the cover page XBRL tags are embedded within the Inline XBRL document) 4

Peoples Bancorp Inc. released its Q2 2026 financial results on July 21, 2026, with a conference call scheduled for the same day to discuss operational performance and key financial metrics.

On July 21, 2026, Peoples Bancorp Inc. reported its financial results for the second quarter of 2026, highlighting the company's operational performance. The report includes details about revenue, net income, and other key financial metrics, and is accompanied by a conference call scheduled for the same day at 11:00 a.m. EDT where executive management will discuss these results. The news release and presentation materials are provided as exhibits to the filing, which would be crucial for investors and analysts assessing the company's financial health and strategic direction.

PEOPLES BANCORP INC.

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