Company: HYAC-WT
Filing Date: 2025-12-10
Form Type: 425
Source: 0001104659-25-119923
Chunk: 1

Company: Haymaker Acquisition Corp. 4
Filing Date: 2025-12-10
Form: 425
Chunk 1
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 each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share |     | HYAC WS   |     | The New York Stock Exchange |

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 companyx

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 7.01 Regulation FD Disclosure.

As previously reported, on October 9, 2025, Haymaker
Acquisition Corp. 4, a Cayman Islands exempted company (“Haymaker”), Suncrete, Inc., a Delaware corporation and direct wholly
owned subsidiary of Haymaker (“PubCo”), Haymaker Merger Sub I, Inc., a Delaware corporation and direct wholly owned subsidiary
of PubCo, Haymaker Merger Sub II, LLC, a Delaware limited liability company and direct wholly owned subsidiary of PubCo, and Concrete
Partners Holding, LLC, a Delaware limited liability company (“Suncrete”), entered into a business combination agreement (the
“Business Combination Agreement”). The transactions contemplated by the Business Combination Agreement are hereinafter referred
to collectively as the “Business Combination.”

Attached as Exhibit 99.1 to this Current Report
on Form 8-K and incorporated into this Item 7.01 by reference is the investor presentation (the “Investor Presentation”)
that may be used by Haymaker and Suncrete in connection with the transactions contemplated by the Business Combination Agreement.

The foregoing (including Exhibit 99.1) is being
furnished pursuant to Item 7.01 and will not be deemed to be filed for purposes of Section 18 of the Securities Exchange Act of 1934,
as amended (the “Exchange Act”), or otherwise be subject to the liabilities of that section, nor will it be deemed to be incorporated
by reference in any filing under the Securities Act of 1933, as amended (the “Securities Act”), or the Exchange Act.

Additional Information and Where To Find It

In connection with the Business Combination, PubCo
and Suncrete have filed