8-K

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C. 20549

Form 8-K

Current Report

Pursuant to Section13 or 15(d) of the

Securities ExchangeAct of 1934

May 14, 2026

Date of Report (Date of earliest event reported)

McKinley AcquisitionCorporation

(Exact Name of Registrant as Specified in its Charter)

Registrant’s telephone number, including area code:

617-671-5148

N/A

(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:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

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 5.02 Departureof Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangement of Certain Officers

On May 14, 2026, the holders of Class B ordinary shares in McKinley Acquisition Corporation (the “Company”) appointed Joseph Shaposhnik as an additional independent director of the Company, and Mr. Shaposhnik consented to such appointment.

In addition, Mr. Shaposhnik was designated by the board of directors of the Company (the “Board”) as an additional Class I Director who shall stand elected for a term expiring at the Company’s first annual general meeting and the Board appointed Mr. Shaposhnik to the Audit Committee and the Compensation Committee.

Joseph Shaposhnik is the Founder and Portfolio Manager of Rainwater Equity, an asset management firm that invests in recurring revenue businesses built by exceptional leaders. Prior to founding Rainwater Equity, he established TCW Group’s New America business unit in 2015, where he served as Portfolio Manager for a range of investment strategies, including the TCW New America Premier Equities Fund/Compounders ETF (GRW), Global Premier Sustainable Equities UCITS, and Global Space Technology Equities portfolios. Before joining TCW Group in 2011, Mr. Shaposhnik was an Equity Research Associate at Fidelity Investments, where he covered the semiconductor and entertainment software industries for the firm’s U.S. domestic equity funds. Mr. Shaposhnik holds a B.S. in Business Administration from the Haas School of Business at the University of California, Berkeley and an MBA from the UCLA Anderson School of Management.

There are no arrangements or understandings between Mr. Shaposhnik and any other person pursuant to which he was appointed to serve as a director of the Board and Mr. Shaposhnik does not have a direct or indirect material interest in any “related party” transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K. There are no family relationships between Mr. Shaposhnik and any director or executive officer of the Company.

Mr. Shaposhnik will receive interests in McKinley Partners, LLC, the Company’s sponsor, for his service as a director of the Company.

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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.

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