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): June 10, 2024

HAYMAKER ACQUISITION CORP. 4

(Exact name of registrant as specified in its charter)

501 Madison Avenue, Floor 5

New York, NY 10022

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (212) 616-9600

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:

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 (§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 x

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. ¨

On June 10, 2024, Haymaker Acquisition Corp. 4 (the “Company”) issued a promissory note (the “Note”) in the principal amount of up to $1,500,000 to Haymaker Sponsor IV LLC (the “Sponsor”). The Note was issued in connection with advances the Sponsor may make in the future to the Company from time to time for working capital expenses. The Note is non-interest bearing and payable upon the earlier of (i) completion of the Company’s initial business combination or (ii) the date the winding up of the Company is effective. At the election of the Sponsor, all or a portion of the unpaid principal amount of the Note may be converted into units of the Company at a price of $10.00 per unit (the “Conversion Units”), which will be identical to the units issued by the Company to the Sponsor in a private placement upon consummation of the Company’s initial public offering. The Conversion Units and their underlying securities are entitled to the registration rights set forth in the Note.

The issuance of the Note was made pursuant to the exemption from registration contained in Section 4(a)(2) of the Securities Act of 1933, as amended.

The foregoing description is qualified in its entirety by reference to the Note, a copy of which is attached as Exhibit 10.1 hereto and is incorporated herein by reference.

The disclosure contained in Item 1.01 of this Current Report on Form 8-K is incorporated by reference in this Item 2.03.

The disclosure contained in Item 1.01 of this Current Report on Form 8-K is incorporated by reference in this Item 3.02.

(d) Exhibits.

SIGNATURE

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.