Shareholder Vote

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) May 14, 2026   Commission file number: 000-03134 PARK-OHIO HOLDINGS CORP. (Exact name of registrant as specified in its charter)   Ohio   34-1867219 (State or other jurisdiction of incorporation or organization)   (I.R.S. Employer Identification No.) 6065 Parkland Boulevard, Cleveland, Ohio   44124 (Address of principal executive offices)   (Zip Code) Registrant’s telephone number, including area code: ( 440 ) 947-2000 Not applicable (Former name or former address, if changed since last report.) 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 Stock, Par Value $1.00 Per Share PKOH The NASDAQ Stock Market LLC 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 (see General Instruction A.2.): ☐ 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)) Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934. ☐ 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. ¨ 2 Item 5.07 Submission of Matters to a Vote of Security Holders. Park-Ohio Holdings Corp. (the “Company”) held its Annual Meeting of Shareholders on May 14, 2026. The final voting results for the proposals submitted for a vote of shareholders at the Annual Meeting of Shareholders are set forth below. Proposal 1. The shareholders elected Patrick V. Auletta, Howard W. Hanna IV and Dan T. Moore III as directors of the Company to serve until the 2029 Annual Meeting of Shareholders. The voting results were as follows: Director Nominee For Withheld Broker Non-Vote Patrick V. Auletta 12,380,526 298,836 542,066 Howard W. Hanna IV 12,464,393 214,969 542,066 Dan T. Moore III 11,343,510 1,335,852 542,066 Proposal 2. The shareholders approved, on an advisory basis, named executive officer compensation. The voting results were as follows: For   Against   Abstain Broker Non-Vote 12,322,715 306,594 50,053 542,066 Proposal 3. The shareholders approved the ratification of the appointment of Ernst & Young LLP as the Company’s independent public accounting firm for 2026. The voting results were as follows: For   Against   Abstain 13,157,427 61,868 2,133 3 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.       Park-Ohio Holdings Corp. (Registrant) Dated: May 14, 2026   /s/ Robert D. Vilsack   Robert D. Vilsack   Chief Legal and Administrative Officer, Corporate Secretary 4