Results of Operations

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) March 11, 2020 Park-Ohio Holdings Corp. (Exact name of registrant as specified in its charter)   Ohio   000-03134   34-1867219 (State or other jurisdiction of incorporation)   (Commission File Number)   (I.R.S. Employer Identification No.) 6065 Parkland Blvd., 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.) 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.  ¨ Item 2.02 Results of Operations and Financial Condition. On March 11, 2020 , Park-Ohio Holdings Corp. issued a press release announcing its year ended December 31, 2019 results. The press release is attached hereto as Exhibit 99.1. The information contained in this Current Report shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits Exhibit Number    Description 99.1    Park-Ohio Holdings Corp. Press Release, dated March 11, 2020 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.         Park-Ohio Holdings Corp.       (Registrant)         Dated: March 11, 2020   /s/ Patrick W. Fogarty       Patrick W. Fogarty       Vice President and Chief Financial Officer 3