# EDGAR Filing Document

**Accession Number:** 0001970509
**File Stem:** 0001104659-26-040194
**Filing Date:** 2026-4
**Character Count:** 114436
**Document Hash:** ab6b67ea7c834902d276f8e470d0907d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-040194.hdr.sgml**: 20260407

**ACCESSION NUMBER**: 0001104659-26-040194

**CONFORMED SUBMISSION TYPE**: 425

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260407

**DATE AS OF CHANGE**: 20260407

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Haymaker Acquisition Corp. 4
- **CENTRAL INDEX KEY:** 0001970509
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 425
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41757
- **FILM NUMBER:** 26843163

**BUSINESS ADDRESS:**
- **STREET 1:** 501 MADISON AVENUE, FLOOR 5
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 2126169600

**MAIL ADDRESS:**
- **STREET 1:** 501 MADISON AVENUE, FLOOR 5
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Haymaker Acquisition Corp. 4
- **CENTRAL INDEX KEY:** 0001970509
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 000000000
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 425

**BUSINESS ADDRESS:**
- **STREET 1:** 501 MADISON AVENUE, FLOOR 5
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022
- **BUSINESS PHONE:** 2126169600

**MAIL ADDRESS:**
- **STREET 1:** 501 MADISON AVENUE, FLOOR 5
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10022

**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): April 1, 2026**

**HAYMAKER ACQUISITION CORP. 4**

**(Exact Name of Registrant as Specified in Charter)**

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| | | |
|:---|:---|:---|
| **Cayman Islands** | **001-41757** | **87-2213850** |
| **(State or Other Jurisdiction<br> of Incorporation)** | **(Commission<br> File Number)** | **(IRS Employer<br> Identification No.)** |

---

---

| |
|:---|
| **324 Royal Palm Way, Suite 300-i**<br> **Palm Beach, FL 33480** |
| **(Address of Principal Executive Offices) (Zip Code)** |

---

**(212) 616-9600**

**(Registrant's Telephone Number, Including Area Code)**

**(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:

⌧ 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))

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

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading <br> Symbol(s)** | **Name of each exchange on<br> which registered** |
| Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant | HYACU | The New York Stock Exchange |
| Class A ordinary shares, par value $0.0001 per share | HYAC | The New York Stock Exchange |
| Warrants, 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 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. ◻

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| | |
|:---|:---|
| **Item 1.01** | **Entry into a Material Definitive Agreement.** |

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As previously disclosed, on October 9, 2025, Haymaker Acquisition Corp. 4 ("Haymaker"), Suncrete, Inc. ("PubCo"), Concrete Partners Holding, LLC ("Suncrete") and the other parties signatory thereto, entered into a Business Combination Agreement (the "Business Combination Agreement") with respect to a business combination between Haymaker, PubCo and Suncrete (the "Business Combination").

<u>**Non-Redemption Agreement**</u>

On April 1, 2026, Haymaker entered into a Non-Redemption Agreement (the "Non-Redemption Agreement") with an existing shareholder of Haymaker, pursuant to which, among other things, the investor agreed to reverse its election to redeem 250,000 Class A ordinary shares of Haymaker, par value $0.0001 per share (the "Holder's Shares"), initially included as part of the units sold in Haymaker's initial public offering (the "Public Shares"), to waive their redemption rights, vote in favor of the Business Combination at the Shareholder Meeting (as defined below), and hold the Holder's Shares through the closing date of the Business Combination. In consideration for the Non-Redemption Agreement, Haymaker has agreed to pay to the investor an amount in cash equal to the product of (a) the excess of (i) the redemption price per Public Share paid by Haymaker to redeeming shareholders in satisfaction of their redemption rights over (ii) $10.75, multiplied by (b) the number of Holder's Shares. The foregoing description of the Non-Redemption Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the form thereof, which is included as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

**<u>Forward Purchase Agreement</u>**

On April 6, 2026, Haymaker and Pubco entered into a forward purchase agreement (the "Forward Purchase Agreement") with each of Harraden Circle Investors, LP ("HCI"), Harraden Circle Special Opportunities, LP ("HCSO"), Harraden Circle Strategic Investments, LP ("HCSI") and Harraden Circle Concentrated, LP ("HCC") (with HCI, HCSO, HCSI, HCC, collectively as "Seller") for a prepaid share forward transaction. Capitalized terms used herein but not otherwise defined shall have the meanings ascribed to such terms in the Forward Purchase Agreement.

Pursuant to the terms of the Forward Purchase Agreement, the Seller has agreed to purchase up to 5,000,000 Shares in accordance with the terms and conditions therein. The Forward Purchase Agreement provides that the Seller will be prepaid an aggregate cash amount (the "Prepayment Amount") equal to the (i) number of Shares, multiplied by (ii) the per-share redemption price at the closing of the Business Combination (the "Initial Price"). The Seller will be paid the Prepayment Amount directly from Haymaker's trust account on the earlier of (a) one (1) business day after the closing of the Business Combination and (b) the date any assets from the trust account are disbursed in connection with the Business Combination. From time to time and on any business day on which Nasdaq and commercial banks in the City of New York are open for business (an "Exchange Business Day"), following the closing of the Business Combination (any such date, an "OET Date"), and subject to the terms and conditions therein, the Seller shall terminate the Transaction in whole or in part with respect to any number of Shares that are sold by Seller on such OET Date by giving notice of such termination and the specified number of Shares (such quantity, the "Terminated Shares"). As of each OET Date, Pubco will be entitled to from Seller, and Seller shall pay to Pubco, an amount equal to (a) the Initial Price multiplied by (b) the Terminated Shares. The Forward Purchase Agreement maturity date will be the earlier of (a) 6 months after the closing of the Business Combination, or (b) ten Exchange Business Days following the date upon which Pubco, in its sole discretion, delivers written notice to Seller that Pubco is accelerating the maturity date; provided that such notice will not be effective until three months after the closing of the Business Combination. In addition, Pubco has the right, in its sole discretion, to extend the maturity up to two times by three months each time by delivering written notice to Seller at least ten Exchange Business Days in advance of the then-scheduled maturity date. At maturity, in exchange for the return of the number of remaining Shares under the Forward Purchase Agreement, the Seller shall retain an amount equal to (i) the number of Shares multiplied by (ii) the Initial Price. The Seller also agreed to waive any redemption rights with respect to the Shares during the term of the Forward Purchase Agreement. The foregoing description of the Forward Purchase Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Forward Purchase Agreement, which is filed as Exhibit 10.1 hereto and is incorporated herein by reference.

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| | |
|:---|:---|
| **Item 5.07** | **Submission of Matters to a Vote of Security Holders.** |

---

On April 2, 2026, Haymaker held an extraordinary general meeting of shareholders (the "Shareholder Meeting") and a special meeting of warrantholders (the "Warrantholder Meeting") in connection with the Business Combination. At the Shareholder Meeting, a total of 21,622,101 of Haymaker's issued and outstanding ordinary shares held of record as of February 11, 2026, the record date for the Shareholder Meeting, were present either in person or by proxy, which constituted a quorum. Haymaker's shareholders voted on the following proposals at the Shareholder Meeting, each of which were approved. The final vote tabulation for each proposal is set forth below.

&nbsp;&nbsp;&nbsp;&nbsp;1. Proposal 1, the Business Combination Proposal, to approve and adopt the Business Combination Agreement.

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| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588978 |  | 1033123 |  | 0 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;2. Proposal 2, the Domestication Proposal, to approve the transfer by way of continuation of Haymaker out
of its jurisdiction of incorporation and into the State of Delaware.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588978 |  | 1033123 |  | 0 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;3. Proposal 3, the Organizational Documents Proposal, to approve and adopt the proposed Haymaker organizational
documents and proposed PubCo organizational documents.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588978 |  | 1033123 |  | 0 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;4. Proposal 4, the Advisory Organizational Documents Proposal, to approve on a non-binding advisory basis,
the adoption of the proposed PubCo organizational documents.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20111847 |  | 1510254 |  | 0 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;5. Proposal 5, the NYSE Proposal, to approve the issuance pursuant to the Business Combination Agreement
of up to an aggregate of 55,908,067 shares of PubCo's Class A Common Stock in connection with the Business Combination and the PIPE
investment.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588978 |  | 1033123 |  | 0 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;6. Proposal 6, the 2026 Plan Proposal, to approve and adopt the Suncrete, Inc. 2026 Omnibus Incentive Plan.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588953 |  | 1033123 |  | 25 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;7. Proposal 7, the ESPP Proposal, to approve and adopt the Suncrete, Inc. Employee Stock Purchase Plan.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588953 |  | 1033123 |  | 25 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;8. Proposal 8, the Shareholder Adjournment Proposal, to authorize the adjournment of the Shareholder Meeting
to a later date or dates, if necessary, to permit further solicitation and voting of proxies.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 20588978 |  | 1033123 |  | 0 |  | 0 |

---

At the Warrantholder Meeting, a total of 9,049,966 of Haymaker's issued and outstanding warrants held of record as of February 11, 2026, the record date for the Warrantholder Meeting, were present either in person or by proxy, which constituted a quorum. Haymaker's warrantholders voted on the following proposals at the Warrantholder Meeting, each of which were approved. The final vote tabulation for each proposal is set forth below.

&nbsp;&nbsp;&nbsp;&nbsp;1. Proposal 1, the Warrant Amendment Proposal, to approve and adopt
an amendment to the terms of the Warrant Agreement, dated as of July 25, 2023, by and between Haymaker and Continental Stock Transfer
& Trust Company.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 8487983 |  | 482361 |  | 79622 |  | 0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;2. Proposal 2, the Warrantholder Adjournment Proposal, to allow Haymaker's board of directors to adjourn
the Warrantholder Meeting to a later date or dates to permit further solicitation of proxies.

---

| | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|
| **Votes For** | **Votes For** | **Votes Against** | **Votes Against** | **Abstentions** | **Abstentions** | **Broker Non-Votes** | **Broker Non-Votes** |
|  | 8777638 |  | 192706 |  | 79622 |  | 0 |

---

**Additional Information and Where To Find It**

In connection with the Business Combination, PubCo and Suncrete have filed with the United States Securities and Exchange Commission (the "SEC") a registration statement on Form S-4 (the "Registration Statement"), which includes a proxy statement with respect to the Shareholder Meeting and a prospectus with respect to PubCo's securities to be issued in connection with the Business Combination (the "proxy statement/prospectus"), as well as other relevant documents concerning the Business Combination. The definitive proxy statement/prospectus included in the Registration Statement has been mailed to the shareholders and warrantholders of Haymaker as of the record date established for voting on the Business Combination. INVESTORS AND SHAREHOLDERS OF HAYMAKER ARE URGED TO READ CAREFULLY AND IN THEIR ENTIRETY THE PROXY STATEMENT/PROSPECTUS REGARDING THE BUSINESS COMBINATION, AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Investors and shareholders can obtain a free copy of the proxy statement/prospectus, as well as other filings containing information about PubCo, Haymaker and Suncrete, without charge, at the SEC's website, http://www.sec.gov.

**No Offer or Solicitation**

This Current Report on Form 8-K (this "Report") shall not constitute a solicitation of a proxy, consent or authorization with respect to any securities or in respect of the Business Combination. This Report shall also not constitute an offer to subscribe for, buy or sell, the solicitation of an offer to subscribe for, buy or sell or an invitation to subscribe for, buy or sell any securities or the solicitation of any vote or approval in any jurisdiction pursuant to or in connection with the proposed transactions or otherwise, nor shall there be any sale, issuance or transfer of securities in any jurisdiction in contravention of applicable law. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act, and otherwise in accordance with applicable law.

**Cautionary Statement Regarding Forward-Looking Statements**

Certain statements herein and the documents incorporated herein by reference may constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended, and Rule 3b-6 promulgated thereunder, which statements involve inherent risks and uncertainties.

Examples of forward-looking statements include, but are not limited to, statements with respect to the expectations, hopes, beliefs, intentions, plans, prospects, financial results or strategies regarding Haymaker, Suncrete, PubCo, the Business Combination and statements regarding the anticipated benefits and timing of the completion of the proposed Business Combination and PIPE investment, the SPAC public warrant exchange, plans and use of proceeds, future financial condition and performance and expected financial impacts of the Business Combination, the satisfaction of closing conditions to the Business Combination, the PIPE investment and the level of redemptions of Haymaker's public shareholders, and PubCo's, Suncrete's and Haymaker's expectations, intentions, strategies, assumptions or beliefs about future events, results of operations or performance that do not solely relate to historical or current facts. These forward-looking statements generally are identified by the words "believe," "project," "expect," "anticipate," "estimate," "intend," "strategy," "future," "opportunity," "potential," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," and similar expressions. Forward-looking statements are based on assumptions as of the time they are made and are subject to risks, uncertainties and other factors that are difficult to predict with regard to timing, extent, likelihood and degree of occurrence, which could cause actual results to differ materially from anticipated results expressed or implied by such forward-looking statements. Such risks, uncertainties and assumptions, include, but are not limited to:

· the risk that the Business Combination and the PIPE investment may not be completed in a timely manner or at all;

· the failure by the parties to satisfy the conditions to the consummation of the PIPE investment, the SPAC public warrant exchange and the Business Combination, including, without limitation, the Minimum Cash Condition (as defined in the Business Combination Agreement);

· the risk that any of the investors do not satisfy their obligations under the non-redemption agreements;

· the fact that Haymaker will retain sole discretion to effect the warrant amendment, including as a result of the level of redeeming stockholders;

· the failure to realize the anticipated benefits of the Business Combination;

· the outcome of any potential legal proceedings that may be instituted against PubCo, Suncrete, Haymaker or others following announcement of the Business Combination;

· the level of redemptions of Haymaker's public shareholders which may reduce the public float of, reduce the liquidity of the trading market of, and/or maintain the quotation, listing, or trading of the Ordinary Shares or the Class A Common Stock of PubCo;

· the failure of PubCo to obtain or maintain the listing of its securities on any stock exchange on which PubCo's Class A Common Stock will be listed after closing of the Business Combination;

· costs related to the Business Combination and as a result of PubCo becoming a public company;

· changes in business, market, financial, political and regulatory conditions;

· risks relating to Suncrete's anticipated operations and business, including the success of any future acquisitions;

· the risk that issuances of equity or debt securities following the closing of the Business Combination, including issuances of equity securities in connection with Suncrete's acquisition strategy, may adversely affect the value of Suncrete's common stock and dilute its stockholders;

· the risk that after consummation of the Business Combination, PubCo experiences difficulties managing its growth and expanding operations;

· challenges in implementing the business plan, due to lack of an operating history, operational challenges, significant competition and regulation; and

· those risk factors discussed in documents filed, or to be filed, with the SEC by PubCo, Haymaker or Suncrete.

The foregoing list of risk factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the "Risk Factors" section Haymaker's Annual Report on Form 10-K, Quarterly Reports on Form 10-Q and the Registration Statement and proxy statement/prospectus filed by PubCo and Suncrete, and other documents filed or to be filed by PubCo, Haymaker and Suncrete from time to time with the SEC. These filings do or will identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. There may be additional risks that none of PubCo, Suncrete or Haymaker presently know or currently believe are immaterial that could also cause actual results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and none of the parties or any of their representatives assumes any obligation or intends to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. None of the parties or any of their representatives gives any assurance that PubCo, Suncrete or Haymaker will achieve its expectations.

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| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.** |

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(d) *Exhibits.*

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| | |
|:---|:---|
| **Exhibit<br> Number** | **Description** |
| [10.1](tm2611164d1_ex10-1.htm) | [Forward Purchase Agreement.](tm2611164d1_ex10-1.htm) |
| [99.1](tm2611164d1_ex99-1.htm) | [Form of Non-Redemption Agreement.](tm2611164d1_ex99-1.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

---

**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | |
|:---|:---|:---|
|  | **Haymaker Acquisition Corp. 4** | **Haymaker Acquisition Corp. 4** |
| April 7, 2026 |  |  |
|  | By: | /s/ Christopher Bradley |
|  | Name: | Christopher Bradley |
|  | Title: | Chief Executive Officer and Chief Financial Officer |

---

## Exhibit 10.1

**Exhibit 10.1**

**Execution Version**

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| | |
|:---|:---|
| **Date:** | April 6, 2026 |

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| | |
|:---|:---|
| **To:** | Haymaker Acquisition Corp. 4, a Cayman Islands exempted company ("**HYAC**"); following the Business Combination, Suncrete, Inc., a Delaware Corporation (collectively, the "**Counterparty**"). |

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| | |
|:---|:---|
| **Address:** | 324 Royal Palm Way, Suite 300-i |
|  | Palm Beach, FL 33480 |

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| | | |
|:---|:---|:---|
| **From:** | (i) | Harraden Circle Investors, LP ("HCI"), (ii) Harraden Circle Special Opportunities, LP ("HCSO"), (iii) Harraden Circle Strategic Investments, LP ("HCSI"), (iv) Harraden Circle Concentrated, LP ("HCC") (with HCI, HCSO, HCSI, HCC collectively, as "**Seller**") |

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| | |
|:---|:---|
| Re: | Prepaid Share Forward (the "**Transaction**") |

---

The purpose of this agreement (this "**Confirmation**") is to confirm the terms and conditions of the transaction (the "**Transaction**") entered into between Seller and the Counterparty on the Trade Date specified below. The term "**Counterparty**" refers to HYAC until the Business Combination (as defined below), and to Suncrete, Inc., a Delaware

Corporation, following the Business Combination. **"Target"** refers to Concrete Partners Holding, LLC, a Delaware limited liability company, prior to the Business Combination. Certain terms of the Transaction shall be as set forth in this Confirmation, with additional terms as set forth in a Pricing Date Notice (the "**Pricing Date Notice**") in the form of <u>Schedule A</u> hereto. This Confirmation, together with the Pricing Date Notice, constitutes a "Confirmation," and the Transaction constitutes a separate "Transaction" as referred to in the ISDA Form (as defined below).

This Confirmation, together with the Pricing Date Notice, evidences a complete binding agreement between Seller, Target and Counterparty as to the subject matter and terms of the Transaction to which this Confirmation relates and shall supersede all prior or contemporaneous written or oral communications with respect thereto.

The 2006 ISDA Definitions (the "**Swap Definitions**") and the 2002 ISDA Equity Derivatives Definitions (the "**Equity Definitions**", and with the Swap Definitions, the "**Definitions**"), each as published by the International Swaps and

Derivatives Association, Inc., are incorporated into this Confirmation. If there is any inconsistency between the Definitions and this Confirmation, this Confirmation governs. If, in relation to the Transaction, there is any inconsistency between the ISDA Form, this Confirmation (including the Pricing Date Notice), the Swap Definitions and the Equity Definitions, the following will prevail for purposes of such Transaction in the order of precedence indicated: (i) this Confirmation (including the Pricing Date Notice); (ii) the Equity Definitions; (iii) the Swap Definitions; and (iv) the ISDA Form.

This Confirmation, together with the Pricing Date Notice, shall supplement, form a part of, and be subject to an agreement in the form of the ISDA 2002 Master Agreement (the "**ISDA Form**") as if Seller, Target and Counterparty had executed an agreement in such form (but without any Schedule except as set forth herein under "**Schedule Provisions**") on the Trade Date.

The terms of the particular Transaction to which this Confirmation relates are as follows, and capitalized terms, as used herein and to the extent not otherwise defined, shall have as their definitions the applicable terms described below:

**<u>General Terms</u>**

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| | |
|:---|:---|
| Type of Transaction: | Share Forward Transaction |
| Trade Date: | April 6, 2026 |
| Valuation Date: | The earlier to occur of (a) the date that is 6-months after the closing of the transactions between Counterparty and Target (the "**Business Combination**") pursuant to the Business Combination Agreement, dated as of October 9, 2025 (the "**Merger Agreement**"), or (b) ten Exchange Business Days following the date upon which Counterparty, in its sole discretion, delivers written notice to Seller that Counterparty is accelerating the Valuation Date *provided* that any notice delivered pursuant to this clause (2) shall not be effective on any date prior to the date that is 3-months after the closing of the Business Combination. Counterparty shall have the right, in its sole discretion, to extend the Valuation Date up to two times by 3-months each time by delivering written notice to Seller at least ten Exchange Business Days in advance of the then-scheduled Valuation Date. |
| Pricing Date Notice: | Seller shall deliver to Counterparty the Pricing Date Notice no later than one (1) business day on which Nasdaq and commercial banks in the City of New York are open for business (each such day an "**Exchange Business Day**") following the closing of the Business Combination. The Pricing Date Notice shall include the Number of Shares subject to this Confirmation. |
| Seller: | Seller. |
| Buyer: | Counterparty. |
| Shares: | Prior to the closing of the Business Combination, the Class A ordinary shares, par value $0.0001 per share, of Haymaker Acquisition Corp. 4, a Cayman Island exempted company (Ticker: "**HYAC**") and after the Business Combination, the Class A common stock, par value $0.0001 per share, of Suncrete Inc, a Delaware corporation (Ticker: "**RMIX**"). |
| Number of Shares: | The Number of Recycled Shares, but in no event more than the Maximum Number of Shares. The Number of Shares is subject to reduction as described under "Optional Early Termination". |

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| | |
|:---|:---|
| Recycled | Shares: A number of free trading Shares (such Shares referred to herein as the "**Public Shares**") equal to the number of Shares purchased by Seller from third parties (other than Counterparty) through a broker in the open market (other than through Counterparty) prior to the closing of the Business Combination, including (without limitation) Shares purchased prior to the Trade Date; provided that Seller shall have irrevocably waived all redemption rights with respect to such Shares as provided below in the section captioned "Transactions by Seller in the Shares". Seller shall specify the number of Recycled Shares (the "**Number of Recycled Shares**") in the initial Pricing Date Notice. Seller (i) will only purchase Public Shares for which Counterparty has confirmed in writing that redemption rights were previously validly exercised and have been validly reversed, and (ii) will not purchase Public Shares in excess of the number of redemption reversals confirmed in writing by Counterparty. No Shares shall be considered Recycled Shares unless they are or were purchased in accordance with the foregoing sentence. <br> Notwithstanding anything to the contrary herein, Seller shall not pay more than the Redemption Price for any Shares purchased by Seller from third parties (other than Counterparty). |
| Maximum Number of Shares: | Initially 5,000,000 (the "**Purchased Amount**"). |
| Initial Price: | The redemption price at the closing of the Business Combination in accordance with the organizational/constitutive documents of the Counterparty (the "**Redemption Price**"). |
| Prepayment: | Payment of the Prepayment Amount shall be made directly from the Counterparty's Trust Account maintained by Continental Stock Transfer & Trust Company holding the net proceeds of the sale of the units in Counterparty's initial public offering (the "**Trust Account**") on the Prepayment Date. |

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| | |
|:---|:---|
|  | Counterparty shall provide (a) notice to Counterparty's trustee of the entry into this Confirmation no later than one (1) Local Business Day following the date hereof, with copy to Seller and Seller's outside legal counsel, and (b) to Seller and Seller's outside legal counsel a final draft of the flow of funds from the Trust Account prior to the closing of the Business Combination itemizing the Prepayment Amount due; provided that Seller shall be invited to attend any closing call in connection with the Business Combination. |
| Prepayment Amount: | On the Prepayment Date, the Counterparty will pay to the Seller an amount equal to the (i) Number of Shares, multiplied by (ii) the Initial Price ("**Prepayment Amount**"). |
| Prepayment Date: | The earlier of (a) one (1) Local Business Day after the closing of the Business Combination and (b) the date any assets from the Trust Account are disbursed in connection with the Business Combination. |
| Variable Obligation: | Not applicable. |
| Redemptions: | Counterparty shall promptly accept any redemption reversal requests in connection with purchases of Shares by Seller for any Public Shares subject to this Confirmation. |
| Exchange(s): | The Nasdaq Stock Market LLC ("**Nasdaq**"). |
| Related Exchange(s): | None. |
| Reimbursement of Legal Fees and Other Expenses: | Counterparty shall pay to Seller an amount equal to (a) the reasonable and documented out-of-pocket attorney fees incurred by Seller or its affiliates in connection with this Transaction in an amount not to exceed $10,000; and (b) brokerage commissions and other fees and expenses incurred and documented in connection with the acquisition of the Public Shares and pre-approved by Counterparty (such approval at the absolute discretion of Counterparty). Such commissions and other fees and expenses must be substantiated by documentation to confirm such commissions, fees and expenses are incurred, and copies thereof delivered to Counterparty. Reimbursement of Legal Fees and Other Expenses provided in clause (a) herein shall be paid on the first Local Business Day after an invoice and payment instructions are received by the Counterparty in writing (provided that any writing received on or after 5:00 p.m. (New York time) shall be deemed received on the following Local Business Day), but in no event shall such payment be due or payable prior to the closing of the Business Combination. Reimbursement of Legal Fees and Other Expenses provided in clause (b) herein shall be paid four (4) Local Business Days after the Counterparty receives substantiation of any pre-approved expense. |

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**<u>Settlement Terms</u>**

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| | |
|:---|:---|
| Settlement Method Election: | Not Applicable. |
| Settlement Method: | Physical Settlement. |
| Settlement Currency: | United States Dollars. |
| Settlement Date: | Two (2) Exchange Business Days following the Valuation Date. |
| Excess Dividend Amount Ex | Ex Amount. |

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| | |
|:---|:---|
| Optional Early Termination | From time to time and on any Exchange Business Day following the closing of the Business Combination (any such date, an "**OET Date**"), and subject to the terms and conditions below, Seller shall terminate the Transaction in whole or in part with respect to any number of Shares that are sold by Seller on such OET Date by giving notice of such termination and the specified number of Shares (such quantity, the "**Terminated Shares**"). As of each OET Date, Counterparty shall be entitled to an amount from Seller, and the Seller shall pay to Counterparty within four (4) Settlement Cycles following each OET Date, an amount equal to the Initial Price, multiplied by (b) the Terminated Shares. The Number of Shares shall be reduced by the number of Terminated Shares for which Seller has paid Counterparty as provided for in this clause. |
|  | The remainder of the Transaction, if any, shall continue in accordance with its terms; provided that if the OET Date is also the Valuation Date, the remainder of the Transaction shall be settled in accordance with the other provisions of "Settlement Terms". |
| Valuation Date Consideration: | On the Valuation Date, in exchange for the return of Public Shares equal to the Number of Shares to Counterparty, Seller shall retain an amount equal to (i) the Number of Shares multiplied by (ii) the Initial Price. In the event the Valuation Date is accelerated by the Counterparty, the Seller shall transfer Public Shares equal to the Number of Shares to a party reasonably acceptable to the Counterparty who agrees to assume the obligations of the Seller hereunder or, if no such substitute Seller is reasonably available, return such Public Shares to Counterparty. |
| Valuation Date Settlement: | The Seller will retain the Valuation Date Consideration from the Prepayment Amount. |

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**<u>Share Adjustments:</u>**

Method of Adjustment: Calculation Agent Adjustment.

**<u>Extraordinary Events:</u>**

Consequences of Merger Events involving Counterparty:

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| | |
|:---|:---|
| Share-for-Share: | Calculation Agent Adjustment. |
| Share-for-Other: | Cancellation and Payment. |
| Share-for-Combined: | Component Adjustment. |
| Tender Offer: | Applicable; *provided, however*, that Section 12.1(d) of the Equity Definitions is hereby amended by adding ", or of the outstanding Shares," before "of the Issuer" in the fourth line thereof. Sections 12.1(e) and 12.1(l)(ii) of the Equity Definitions are hereby amended by adding "or Shares, as applicable," after "voting Shares". |

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**<u>Consequences of Tender Offers:</u>**

---

| | |
|:---|:---|
| Share-for-Share: | Calculation Agent Adjustment. |
| Share-for-Other: | Calculation Agent Adjustment. |
| Share-for-Combined: | Calculation Agent Adjustment. |

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---

| | |
|:---|:---|
| Composition of Combined Consideration: | Not Applicable. |
| Nationalization, Insolvency or Delisting: | Cancellation and Payment (Calculation Agent Determination); provided that in addition to the provisions of Section 12.6(a)(iii) of the Equity Definitions, it shall also constitute a Delisting if the Exchange is located in the United States and the Shares are not immediately re-listed, re-traded or re-quoted on any of the New York Stock Exchange, the Nasdaq Global Select Market, Nasdaq Capital Market or the Nasdaq Global Market (or their respective successors) or such other exchange or quotation system which, in the determination of the Calculation Agent, has liquidity comparable to the aforementioned exchanges; if the Shares are immediately re-listed, re-traded or re-quoted on any such exchange or quotation system, such exchange or quotation system shall be deemed to be the Exchange. |
| Business Combination Exclusion: | Notwithstanding the foregoing or any other provision herein, the parties agree that the Business Combination shall not constitute a Merger Event, Tender Offer, Delisting or any other Extraordinary Event hereunder. |

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**<u>Additional Disruption Events:</u>**

---

| | |
|:---|:---|
| (a) Change in Law: | Applicable; *provided* that Section 12.9(a)(ii) of the Equity Definitions is hereby amended by adding the words "(including, for the avoidance of doubt and without limitation, adoption or promulgation of new regulations authorized or mandated by existing statute)" after the word "regulation" in the second line thereof. |
| (a) Failure to Deliver: | Not Applicable. |
| (b) Insolvency Filing: | Applicable. |
| (c) Hedging Disruption: | Not Applicable. |
| (d) Increased Cost of Hedging: | Not Applicable. |
| (e) Loss of Stock Borrow: | Not Applicable. |
| (f) Increased Cost of Stock Borrow: | Not Applicable. |
| Determining Party: | For all applicable events, Seller, unless (i) an Event of Default, Potential Event of Default or Termination Event has occurred and is continuing with respect to Seller, or (ii) if Seller fails to perform its obligations as Determining Party, in which case a Third Party Dealer (as defined below) in the relevant market selected by Counterparty will be the Determining Party. |
| Counterparty Share Settlement Election Provision (ASC 815-40-25 Compliance) | Notwithstanding anything to the contrary in this Confirmation or the Equity Definitions (including Sections 12.7 and 12.8 thereof), the Transaction shall not be cancelled and settled by payment of any Cancellation Amount or other net settlement payment obligation having the effect of settling all obligations owed under this Transaction upon the occurrence of any Market Disruption Event, Termination Event, or any other event outside the control of Counterparty, other than the retention by the Seller of the Redemption Price per Share (less any amounts owed pursuant to a final non-appealable judgment). |

---

---

| |
|:---|
| For the avoidance of doubt, no monetary amount other than the Redemption Price per Share (less indemnity or default payment owed, if any, pursuant to a final non-appealable judgment) shall be determined or owed by Counterparty in respect of the value of the Transaction (i.e., Cancellation Amount or similar concept), and the Transaction shall be settled solely through delivery of Shares by Seller to Counterparty and the retention by the Seller of the Redemption Price per Share (less any amounts owed, if any, pursuant to a final non-appealable judgment). |
| Nothing in this Confirmation shall be interpreted as absolving Counterparty of paying amounts owed hereunder; provided that any such amounts (including damages, indemnity payments, or interest) shall not be determined by reference to the value of the Transaction or the Shares and shall not serve as a substitute for settlement of the Transaction. Nothing in this Confirmation shall be interpreted as absolving Seller of delivering Shares as required under this Transaction. |

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**<u>Additional Provisions:</u>**

---

| | |
|:---|:---|
| Calculation Agent: | Seller, unless (i) an Event of Default, Potential Event of Default or Additional Termination Event has occurred and is continuing with respect to Seller, or (ii) if Seller fails to perform its obligations as Calculation Agent, in which case an unaffiliated leading dealer in the relevant market selected by Counterparty in its sole discretion will be the Calculation Agent. |
|  | In the event that a party (the "**Disputing Party**") does not agree with any determination made (or the failure to make any determination) by the Calculation Agent, the Disputing Party shall have the right to require that the Calculation Agent have such determination reviewed by a disinterested third party that is a dealer in derivatives of the type that is the subject of the dispute and that is not an Affiliate of either party (a "**Third Party Dealer**"). Such Third Party Dealer shall be jointly selected by the parties within one (1) Business Day after the Disputing Party's exercise of its rights hereunder (once selected, such Third Party Dealer shall be the "**Substitute Calculation Agent**"). If the parties are unable to agree on a Substitute Calculation Agent within the prescribed time, each of the parties shall elect a Third Party Dealer and such two dealers shall agree on a Third Party Dealer by the end of the subsequent Business Day. Such Third Party Dealer shall be deemed to be the Substitute Calculation Agent. Any exercise by the Disputing Party of its rights hereunder must be in writing and shall be delivered to the Calculation Agent not later than the third Business Day following the Business Day on which the Calculation Agent notifies the Disputing Party of any determination made (or of the failure to make any determination). Any determination by the Substitute Calculation Agent shall be binding in the absence of manifest error and shall be made as soon as possible but no later than the second Business Day following the Substitute Calculation Agent's appointment. The costs of such Substitute Calculation Agent shall be borne by (a) the Disputing Party if the Substitute Calculation Agent substantially agrees with the Calculation Agent or (b) the non- Disputing Party if the Substitute Calculation Agent does not substantially agree with the Calculation Agent. If, after following the procedures and within the specified time frames set forth above, a binding determination is not achieved, the original determination of the Calculation Agent shall apply. |
| Non-Reliance: | Applicable. |
| Agreements and Acknowledgements Regarding Hedging Activities: | Applicable. |
| Additional Acknowledgements: | Applicable. |

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**<u>Collateral Provisions:</u>**

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| | |
|:---|:---|
| Grant of Security Interest: | None. |
| Collateral: | None. |
| Securities Account: | None. |
| Securities Intermediary: | None. |
| Perfection: | None |

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**<u>Schedule Provisions:</u>**

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| | |
|:---|:---|
| Specified Entity: | In relation to both Seller and Counterparty for the purpose of: Section 5(a)(v) of the ISDA Form, Not Applicable; Section 5(a)(vi) of the ISDA Form, Not Applicable; Section 5(a)(vii) of the ISDA Form, Not Applicable; Section 5(b)(v) of the ISDA Form, Not Applicable |
| Cross-Default | The "Cross-Default" provisions of Section 5(a)(vi) of the ISDA Form will not apply to either party. |
| Credit Event Upon Merger | The "Credit Event Upon Merger" provisions of Section 5(b)(v) of the ISDA Form will not apply to either party. |
| Interpretation of "Seller": | For purposes of Section 5 of the ISDA Form, "Seller" shall be interpreted to mean each of HCI, HCSO, HCSI, HCC, individually or collectively. |
| Automatic Early Termination: | The "Automatic Early Termination" of Section 6(a) of the ISDA Form will not apply to either party. |
| Termination Currency: | United States Dollars. |
| Additional Termination Event: | Will apply to Seller and to Counterparty. The occurrence of any of the following events shall constitute an Additional Termination Event: |
|  | (a) The Merger Agreement is terminated prior to the closing of the Business Combination; and |
|  | (b) If it is, or, as a consequence of a change in law, regulation or interpretation, it becomes or will become, unlawful for the Seller or Counterparty to perform any of its obligations contemplated by the Transaction; and |
|  | (c) Upon the occurrence of any Material Adverse Change of the Counterparty. |
|  | Notwithstanding the foregoing, Counterparty's obligations set forth under the caption, "Reimbursement of Legal Fees and Other Expenses" and both parties' obligations under the caption "Other Provisions — (d) Indemnification" shall survive any termination due to the occurrence of any of the foregoing Additional Termination Events. Upon any termination that occurs following the closing of the Business Combination due to paragraph (b) or (c) above, Counterparty shall be obligated to promptly accept for redemption all of Seller's Shares (up to the Number of Shares) in exchange for the Initial Price, less any Prepayment Amount actually received. Except as set forth in the immediately preceding sentence, in all other circumstances no further payments or deliveries shall be due by either Seller to Counterparty or Counterparty to Seller in respect of the Transaction, including without limitation in respect of any settlement amount, breakage costs or any amounts representing the future value of the Transaction, and neither party shall have any further obligation under the Transaction and, for the avoidance of doubt and without limitation, no payments will have accrued or be due under Sections 2, 6 or 11 of the ISDA Form. |

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| | |
|:---|:---|
| Material Adverse Change: | Means any change, event, or occurrence, that, individually or when aggregated with other changes, events, or occurrences has had a materially adverse effect on the business, assets, financial condition or results of operations of Counterparty and its subsidiaries, taken as a whole; provided, however, that no change, event, occurrence or effect arising out of or related to any of the following, alone or in combination, shall be taken into account in determining whether a Material Adverse Change pursuant has occurred: (i) acts of war (whether or not declared), sabotage, military or para-military actions or terrorism, or any escalation or worsening of any such acts, or changes in global, national or regional political or social conditions; (ii) earthquakes, hurricanes, tornados, epidemics and pandemics declared by the World Health Organization or any other reputable third party organization (including the COVID-19 virus) or other natural or man-made disasters; (iii) changes attributable to the public announcement or pendency of the transactions contemplated herein (including the impact thereof on relationships with customers, suppliers, employees or governmental authorities); (iv) changes or proposed changes in law, regulations or interpretations thereof or decisions by courts or any governmental authority; (v) changes or proposed changes in GAAP (or any interpretation thereof); (vi) any downturn in general economic conditions, including changes in the credit, debt, securities, financial, capital or reinsurance markets (including changes in interest or exchange rates or the price of any security, market index or commodity), in each case, in the United States or anywhere else in the world; (vii) events or conditions generally affecting the industries and markets in which the Counterparty operates; (viii) any failure to meet any projections, forecasts, estimates, budgets or financial or operating predictions of revenue, earnings, cash flow or cash position, provided that this clause (viii) shall not prevent a determination that any change, event, or occurrence underlying such failure (unless otherwise excluded by the other clauses of this proviso) has resulted in a Material Adverse Change; or (ix) any actions expressly required to be taken, or expressly required not to be taken, pursuant to the terms hereof; provided, however, that if a change or effect related to clause (ii) or clauses (iv) through (vii) disproportionately adversely affects the Counterparty and its subsidiaries, taken as a whole, compared to other Persons operating in the same industry as the Counterparty, then such incremental disproportionate impact may be taken into account in determining whether a Material Adverse Change has occurred. |
| Governing Law: | New York law (without reference to choice of law doctrine). |
| Credit Support Document: | With respect to Seller and Counterparty, None. |
| Credit Support Provider: | With respect to Seller and Counterparty, None. |
| Local Business Days: | Seller specifies the following places for the purposes of the definition of Local Business Day as it applies to it: New York. |
|  | Counterparty specifies the following places for the purposes of the definition of Local Business Day as it applies to it: New York. |

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**<u>Representations, Warranties and Covenants</u>**

1. Each of Counterparty and Seller represents
 and warrants to, and covenants and agrees with, the other as of the date on which it enters
 into the Transaction that (in the absence of any written agreement between the parties that
 expressly imposes affirmative obligations to the contrary for the Transaction):

&nbsp;&nbsp;&nbsp;&nbsp;(a) *<u>Non-Reliance</u>.* It is acting
 for its own account, and it has made its own independent decisions to enter into the Transaction
 and as to whether the Transaction is appropriate or proper for it based upon its own judgment
 and upon advice from such advisers as it has deemed necessary. It is not relying on any communication
 (written or oral) of the other party as investment advice or as a recommendation to enter
 into the Transaction, it being understood that information and explanations related to the
 terms and conditions of the Transaction will not be considered investment advice or a recommendation
 to enter into the Transaction. No communication (written or oral) received from the other
 party will be deemed to be an assurance or guarantee as to the expected results of the Transaction.

&nbsp;&nbsp;&nbsp;&nbsp;(b) *<u>Assessment and Understanding</u>.* It is capable of assessing the merits of and understanding (on its own behalf or through
 independent professional advice), and understands and accepts, the terms, conditions and
 risks of the Transaction. It is also capable of assuming, and assumes, the risks of the Transaction.

&nbsp;&nbsp;&nbsp;&nbsp;(c) *<u>Non-Public Information</u>.* It is in compliance with Section 10(b) under the Securities Exchange Act of 1934, as amended
 (the "**Exchange Act** ").

&nbsp;&nbsp;&nbsp;&nbsp;(d) *<u>Eligible Contract Participant</u>.* It is an "eligible contract participant" under, and as defined in, the Commodity

Exchange Act (7 U.S.C. § 1a(18)) and CFTC regulations (17 CFR § 1.3).

&nbsp;&nbsp;&nbsp;&nbsp;(e) *<u>Tax Characterization</u>* .
 It shall treat the Transaction as a derivative financial contract for U.S. federal income
 tax purposes, and it shall not take any action or tax return filing position contrary to
 this characterization.

&nbsp;&nbsp;&nbsp;&nbsp;(f) *<u>Private Placement</u>* . It
 (i) is an "accredited investor" as such term is defined in Regulation D as promulgated
 under the Securities Act, (ii) is entering into the Transaction for its own account without
 a view to the distribution or resale thereof and (iii) understands that the assignment, transfer
 or other disposition of the Transaction has not been and will not be registered under the
 Securities Act.

&nbsp;&nbsp;&nbsp;&nbsp;(g) *<u>Investment Company Act</u>* <u>.</u> It is not and, after giving effect to the Transaction, will not be required to register as
 an "investment company" under, and as such term is defined in, the Investment
 Company Act of 1940, as amended.

&nbsp;&nbsp;&nbsp;&nbsp;(h) *<u>Authorization</u>.* The Transaction
 has been entered into pursuant to authority granted by its board of directors or other governing
 authority. It has no internal policy, whether written or oral, that would prohibit it from
 entering into any aspect of the Transaction, including, but not limited to, the purchase
 of Shares to be made in connection therewith.

&nbsp;&nbsp;&nbsp;&nbsp;(i) *<u>Affiliate Status</u>* . It is
 the intention of the parties hereto that Seller shall not be an "affiliate" (as
 such term is defined in Rule 405 under the Securities Act) of the Counterparty, including
 HYAC or Concrete Partners Holding, LLC following the closing of the Business Combination,
 as a result of the transactions contemplated hereunder

&nbsp;&nbsp;&nbsp;&nbsp;(j) *<u>Tender Offer Rules</u>.* Counterparty,
 Target and Seller each acknowledge that the Transaction has been structured, and all activity
 in connection with the Transaction has been undertaken to comply with the

requirements of all tender offer regulations applicable to the Business Combination, including Rule 14e-5 under the Exchange Act.

&nbsp;&nbsp;&nbsp;&nbsp;(k) *<u>Enforceability</u>.* The Transaction,
 including the Confirmation, when executed and delivered by each of the parties, will constitute
 the valid and legally binding obligation of each such party, enforceable against each of
 them in accordance with its terms, except (i) as limited by applicable bankruptcy, insolvency,
 reorganization, moratorium, fraudulent conveyance and any other laws of general application
 affecting enforcement of creditors' rights generally, or (ii) as limited by laws relating
 to the availability of specific performance, injunctive relief or other equitable remedies.

&nbsp;&nbsp;&nbsp;&nbsp;(l) *<u>Compliance with Other Instruments and Law</u>.* The execution, delivery and performance of this Transaction, including the
 Confirmation, and the consummation of the Transaction, will not result in any violation or
 default (i) of any provisions of its organizational documents, (ii) of any instrument, judgment,
 order, writ or decree to which it is a party or by which it is bound, (iii) under any note,
 indenture or mortgage to which it is a party or by which it is bound, (iv) under any lease,
 agreement, contract or purchase order to which it is a party or by which it is bound or (v)
 of any provision of any applicable federal or state statute, rule or regulation, in each
 case (other than clause (i)), which would have a material adverse effect on it or its ability
 to consummate the Transaction.

2. Counterparty represents and warrants to, and
 covenants and agrees with Seller as of the date on which it enters into the Transaction that:

&nbsp;&nbsp;&nbsp;&nbsp;(a) *<u>Non-Reliance</u>.* Without
 limiting the generality of Section 13.1 of the Equity Definitions, Counterparty acknowledges
 that Seller is not making any representations or warranties or taking any position or expressing
 any view with respect to the treatment of the Transaction under any accounting standards.

&nbsp;&nbsp;&nbsp;&nbsp;(b) *<u>Solvency</u>* . Counterparty
 is, and shall be as of the date of any payment or delivery by Counterparty under the Transaction,
 solvent and able to pay its debts as they come due, with assets having a fair value greater
 than liabilities and with capital sufficient to carry on the businesses in which it engages.
 Counterparty: (i) has not engaged in and will not engage in any business or transaction after
 which the property remaining with it will be unreasonably small in relation to its business,
 (ii) has not incurred and does not intend to incur debts beyond its ability to pay as they
 mature, and (iii) as a result of entering into and performing its obligations under the Transaction,
 (a) it has not violated and will not violate any relevant state law provision applicable
 to the acquisition or redemption by an issuer of its own securities and (b) it would not
 be nor would it be rendered "insolvent" (as such term is defined under Section
 101(32) of the Bankruptcy Code).

&nbsp;&nbsp;&nbsp;&nbsp;(c) *<u>Public Reports</u>.* As of
 the Trade Date, Counterparty is in material compliance with its reporting obligations under
 the Exchange Act, and all reports and other documents filed by Counterparty with the Securities
 and Exchange Commission pursuant to the Exchange Act, when considered as a whole (with the
 most recent such reports and documents deemed to amend inconsistent statements contained
 in any earlier such reports and documents), do not contain any untrue statement of a material
 fact or any omission of a material fact required to be stated therein or necessary to make
 the statements therein, in the light of the circumstances under which they were made, not
 misleading.

&nbsp;&nbsp;&nbsp;&nbsp;(f) <u>[  ***Reserved*** *.* ]</u> 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g) *<u>Disclosure</u>* . Counterparty
 agrees to comply with applicable SEC guidance in respect of disclosure and the Counterparty
 shall preview with Seller all public disclosure relating to the Transaction and shall consult
 with Seller to ensure that such public disclosure, including the press release, Form 8-K
 or other filing that announces the Transaction adequately discloses the material terms and
 conditions of the Transaction in form and substance reasonably acceptable to Seller; provided
 that the Form 8-K shall be publicly filed filed on the first Local Business Day after definitive
 transaction documents are signed.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) *<u>Regulation M and Target Approvals</u>* .
 Counterparty is not on the Trade Date and agrees and covenants that it

will not be on any date Seller is purchasing shares that may be included in a Pricing Date Notice, engaged or engaging in a distribution, as such term is used in Regulation M under the Exchange Act, of any securities of Counterparty, other than a distribution meeting the requirements of the exception set forth in Rules 101(b)(10) and 102(b)(7) of Regulation M. Counterparty shall not, until the second Scheduled Trading Day immediately following the dates referenced in the preceding sentence, engage in any such distribution. Counterparty, including Target, also agrees and covenants that the Merger Agreement shall be executed and all required approvals and consents of the Target security holders in connection with the Business Combination shall be obtained and any subsequent valuation periods as contemplated under Regulation M under the Exchange Act, shall be completed in each case no later than HYAC's redemption deadline.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) *<u>No conflicts</u>* . The execution
 and delivery by the Counterparty and Target of, and the performance by the Counterparty and
 the Target of its obligations under, the Transaction and the Confirmation and the consummation
 of the transactions contemplated by the Confirmation, including the payments and share issuances
 hereunder, do not and will not result in any breach or violation of or constitute a default
 under (nor constitute any event which, with notice, lapse of time or both, would result in
 any breach or violation of or constitute a default under or give the holder of any indebtedness
 (or a person acting on such holder's behalf) the right to require the repurchase, redemption
 or repayment of all or a part of such indebtedness under) (or result in the creation or imposition
 of a lien, charge or encumbrance on any property or assets of the Counterparty, the Target
 or any of their respective subsidiaries pursuant to) (i) any provision of applicable law,
 (ii) the organizational documents of any of the Counterparty, the Target or any of their
 respective subsidiaries, (iii) any indenture, mortgage, deed of trust, bank loan or credit
 agreement or other evidence of indebtedness, or any license, lease, contract or other agreement
 or instrument binding upon the Counterparty, the Target or any of their respective subsidiaries,
 or (iv) any judgment, order or decree of any governmental body, agency or court having jurisdiction
 over the Counterparty, the Target or any of their respective subsidiaries, and no consent,
 approval, authorization or order of, or qualification with, any governmental body or agency
 is required for the performance by the Counterparty or the Target of their respective obligations
 under the Confirmation, except as have been obtained. In addition, the Counterparty and Target
 covenant and agree not to enter into any agreement or other arrangement that would prohibit,
 restrict or otherwise prevent the Counterparty from performing its obligations hereunder,
 including the making of any payment or Share issuance to the Seller.

3. Seller represents and warrants to, and covenants
 and agrees with Counterparty as of the date on which it enters into the Transaction and each
 other date specified that:

&nbsp;&nbsp;&nbsp;&nbsp;(a) *<u>Regulatory Filings</u>* . It,
 together with each other person in the Seller Group (as defined in "Other Provisions"
 below), is in compliance with all material regulatory filings relating to the Counterparty
 and the Transaction. Seller covenants that it will make all regulatory filings that it is
 required by law or regulation to make with respect to the Transaction including, without
 limitation, as may be required by Section 13 or Section 16 under the Exchange Act.

&nbsp;&nbsp;&nbsp;&nbsp;(b) *<u>Shareholder Vote</u>* . Seller
 agrees to not vote any Shares it holds as of the applicable record date in connection with
 the Business Combination at any meeting of the Counterparty's shareholders (or to provide
 a written consent for that purpose with respect to such Shares) if it would be in violation
 of the Securities and Exchange

Commission's Compliance and Disclosure Interpretation No. 166.01 to do so.

&nbsp;&nbsp;&nbsp;&nbsp;(c) *<u>Private Placement</u>* . Seller
 (i) is an "accredited investor" as such term is defined in Regulation D as promulgated
 under the Securities Act, (ii) is entering into the Transaction for its own account without
 a view to the distribution or resale thereof and (iii) understands that the assignment, transfer
 or other disposition of the Transaction has not been and will not be registered under the
 Securities Act.

&nbsp;&nbsp;&nbsp;&nbsp;(d) *<u>Shorting</u>* . During the term
 of the Transaction, Seller agrees not to effect any Short Sales in respect of the

Shares prior to the earlier of (a) the Settlement Date and (b) the cancellation of the Transaction. "**Short Sales**" means all "short sales" as defined in Rule 200 promulgated under Regulation SHO under the Exchange Act, whether or not against the box, and all types of direct and indirect stock pledges, forward sale contracts, options, puts, calls, short sales, swaps, "put equivalent positions" (as defined in Rule 16a-1(h) under the Exchange Act) and similar arrangements (including on a total return basis).

&nbsp;&nbsp;&nbsp;&nbsp;(e) *<u>Lock-Up; Transfer Restrictions</u>.* Seller agrees that, until the earlier of the Valuation Date and the date all Recycled Shares
 have been sold, it shall not directly or indirectly transfer any Recycled Shares except as
 in compliance with the terms of this Transaction.

**<u>Transactions by Seller in the Shares</u>**

Seller hereby waives the redemption rights ("**Redemption Rights**") set forth in Counterparty's memorandum and articles of association in connection with the Business Combination with respect to the Public Shares save for any redemption following the Additional Termination Events set out in (b) and (c) in the Additional Termination Event section above. Unless specified in an OET Notice, no sale of Shares by the Seller shall terminate all or any portion of this Confirmation and provided that Seller complies with all of its other obligations hereunder nothing contained herein shall limit any of Seller's purchases and sale of Shares

As soon as is reasonable possible, but no longer than 10 business days following the Prepayment Date, the Seller will transfer all Public Shares held pursuant to this Confirmation to the Seller's Prime Brokerage account at Cantor

Fitzgerald. The Public Shares will be held at Cantor Fitzgerald until the Valuation Date or their earlier sale pursuant to an Optional Early Termination. From time to time at the Counterparty's request, Seller shall instruct Cantor

Fitzgerald to provide the Counterparty with a report independently confirming the number of Shares held pursuant to this Confirmation.

On each OET Date the notice given by Seller to Buyer shall include a trade blotter capturing all transactions relating to the Recycled Shares that took place prior to the OET Date. From time to time at the Counterparty's request, Seller shall instruct Cantor Fitzgerald to provide a report to Counterparty independently confirming the number of Recycled Shares held pursuant to this Confirmation.

**<u>No Arrangements</u>**

Seller and Counterparty each acknowledge and agree that: (i) there are no voting, hedging or settlement arrangements between Seller and Counterparty with respect to any Shares, other than those set forth herein; (ii) Counterparty will not be entitled to any voting rights in respect of any of the Shares underlying the Transaction; and (iii) Counterparty will not seek to influence Seller with respect to the voting of any Hedge Positions of Seller consisting of Shares.

**<u>Wall Street Transparency and Accountability Act</u>**

In connection with Section 739 of the Wall Street Transparency and Accountability Act of 2010 ("**WSTAA**"), the parties hereby agree that neither the enactment of WSTAA or any regulation under WSTAA, nor any requirement under WSTAA or an amendment made by WSTAA, nor any similar legal certainty provision in any legislation enacted, or rule or regulation promulgated, on or after the date of this Confirmation, shall limit or otherwise impair either party's otherwise applicable rights to terminate, renegotiate, modify, amend or supplement this Confirmation or the ISDA Form, as applicable, arising from a termination event, force majeure, illegality, increased costs, regulatory change or similar event under this Confirmation, the Equity Definitions incorporated herein, or the ISDA Form.

**<u>Specific Performance</u>**

Seller agrees that irreparable damage may occur for which money damages will be inadequate in the event Seller breaches or otherwise default with respect to the requirements at Section 3(d) (*Shorting*) or Section 3(e) (*Lock-up; Transfer Restrictions*) of this Confirmation or the requirement to deliver Shares following the Prepayment Date or the Valuation Date. Accordingly, Counterparty shall be entitled to specific performance of the terms hereof, in addition to any other remedy at law or equity due to any such breach or other default with respect to the requirements at Section 3(d) (*Shorting*) or Section 3(e) (*Lock-up; Transfer Restrictions*) of this Confirmation or the requirement to deliver Shares following the Prepayment Date or the Valuation Date.

**<u>Address for Notices</u>**

**Notice to Seller:**

Harraden Circle Investments LLC

299 Park Avenue, 21<sup>st</sup> Floor

New York, NY 10171

Attention: Frederick V. Fortmiller, Jr.

Email: research@harraden.com

*With a mandatory copy (which shall not constitute notice) to:*

Loeb & Loeb LLP

345 Park Avenue

New York, NY 10154

Attn: Giovanni Caruso

Telephone No.: (212) 407-4866

Email: gcaruso@loeb.com

**Notice to Counterparty:**

If prior to the Business Combination:

c/o Haymaker Acquisition Corp. 4

324 Royal Palm Way, Suite 300-i

Palm Beach, Florida 33480

Attention:

Christopher Bradley

Email:

cbradley@mistralequity.com

*with a copy to (but which shall not constitute notice):*

DLA Piper LLP (US)

1251 Avenue of the Americas, 27th

New York, NY 10020-1104

Attention:

Sidney Burke

Stephen P. Alicanti

Justin Michael

Email:

sidney.burke@us.dlapiper.com

stephen.alicanti@us.dlapiper.com

justin.michael@us.dlapiper.com

If following the Business Combination:

c/o SunTX Capital Partners

5420 LBJ Freeway, Suite 1000

Dallas, Texas 75240

Attention:

Barrett Bruce

Email:

BBruce@suntx.com

*with copies to (but which shall not constitute notice):*

Haynes and Boone, LLP

2801 N. Harwood Street, Suite 2300

Dallas, TX 75201

Attention:

Greg R. Samuel

Matthew L. Fry

Kellie Bobo

Email:

Greg.Samuel@haynesboone.com

Matt.Fry@haynesboone.com

Kellie.Bobo@haynesboone.com

**<u>Other Provisions.</u>**

(a) *<u>Rule 10b5-1</u>* .

&nbsp;&nbsp;&nbsp;&nbsp;(i) Counterparty represents and warrants
 to Seller that Counterparty is not entering into the Transaction to create actual or apparent
 trading activity in the Shares (or any security convertible into or exchangeable for the
 Shares) or to raise or depress or otherwise manipulate the price of the Shares (or any security
 convertible into or exchangeable for the Shares) for the purpose of inducing the purchase
 or sale of such securities or otherwise in violation of the Exchange Act, and Counterparty
 represents and warrants to Seller that Counterparty has not entered into or altered, and
 agrees that Counterparty will not enter into or alter, any corresponding or hedging transaction
 or position with respect to the Shares. Counterparty acknowledges that it is the intent of
 the parties that the Transaction comply with the requirements of paragraphs (c)(1)(i)(A)
 and (B) of Rule 10b5-1 under the Exchange Act ()"**Rule 10b5-1**") and
 the Transaction shall be interpreted to comply with the requirements of Rule 10b5-1(c).

&nbsp;&nbsp;&nbsp;&nbsp;(ii) Counterparty agrees that it will not
 seek to control or influence Seller's decision to make any "purchases or sales"
 (within the meaning of Rule 10b5-1(c)(1)(i)(B)(3)) under the Transaction, including, without
 limitation, Seller's decision to enter into any hedging transactions. Counterparty
 represents and warrants that it has consulted with its own advisors as to the legal aspects
 of its adoption and implementation of this Confirmation and the Transaction under Rule 10b5-1.

&nbsp;&nbsp;&nbsp;&nbsp;(iii) Counterparty acknowledges and agrees
 that any amendment, modification, waiver or termination of this Confirmation must be effected
 in accordance with the requirements for the amendment or termination of a "plan"
 as defined in Rule 10b5-1(c). Without limiting the generality of the foregoing, Counterparty
 acknowledges and agrees that any such amendment, modification, waiver or termination shall
 be made in good faith and not as part of a plan or scheme to evade the prohibitions of Rule
 10b-5, and no such amendment, modification or waiver shall be made at any time at which Counterparty
 is aware of any material non-public information regarding Counterparty or the Shares.

(b) [  ***Reserved*** .]

(c) *<u>Transfer or Assignment</u>* . The
 rights and duties under this Confirmation may not be transferred or assigned by any party
 hereto without the prior written consent of the other party, such consent not to be unreasonably
 withheld, subject to the immediately following sentence. If at any time following the closing
 of the Business Combination at which (A) the Section 16 Percentage exceeds 9.9999%, or (B)
 the Share Amount exceeds the Applicable Share Limit (if any applies) (any such condition
described in clause (A) or (B), an "**Excess Ownership Position** "),

Seller is unable to effect a transfer or assignment of a portion of the Transaction to a third party on pricing terms reasonably acceptable to Seller and within a time period reasonably acceptable to Seller such that no Excess Ownership Position exists, then Seller may designate any Exchange Business Day as an Early Termination Date with respect to a portion of the Transaction (the "**Terminated Portion**"), such that following such partial termination no Excess Ownership Position exists. In the event that Seller so designates an Early Termination Date with respect to a portion of the Transaction, a portion of the Shares with respect to the Transaction shall be delivered to Counterparty as if the Early Termination Date was the Valuation Date in respect of a Transaction having terms identical to the Transaction and a Number of Shares equal to the number of Shares underlying the

Terminated Portion. The "**Section 16 Percentage**" as of any day is the fraction, expressed as a percentage, as determined by Seller, (A) the numerator of which is the number of Shares that Seller and each person subject to aggregation of Shares with Seller under Section 13 or Section 16 of the Exchange Act and rules promulgated thereunder and all persons who may form a "group" (within the meaning of Rule 13d-5(b)(1) of the Exchange Act) with Seller directly or indirectly beneficially own (as defined under Section 13 or Section 16 of the Exchange Act and rules promulgated thereunder) (the **"Seller Group**") and (B) the denominator of which is the number of Shares outstanding.

The "**Share Amount**" as of any day is the number of Shares that Seller and any person whose ownership position would be aggregated with that of Seller and any group (however designated) of which Seller is a member (Seller or any such person or group, a "Seller Person") under any law, rule, regulation, regulatory order or organizational documents or contracts of Counterparty that are, in each case, applicable to ownership of Shares ("**Applicable Restrictions**"), owns, beneficially owns, constructively owns, controls, holds the power to vote or otherwise meets a relevant definition of ownership under any Applicable Restriction, as determined by Seller in its sole discretion.

The "**Applicable Share Limit**" means a number of Shares equal to (A) the minimum number of Shares that could give rise to reporting or registration obligations or other requirements under Section 16 of the Exchange Act including obtaining prior approval from any person or entity) of a Seller Person, or could result in an adverse effect on a Seller Person, under any Applicable Restriction, as determined by Seller in its sole discretion, *minus*

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(B) 0.0001% of the number of Shares outstanding.

(d) *<u>Indemnification</u>* . Each of Counterparty
 and Seller (each, an "**Indemnifying Party**") agrees to indemnify and hold
 harmless the other party, its affiliates and its assignees and their respective directors,
 officers, employees, agents and controlling persons (each such person being an "**Indemnified Party**") from and against any and all losses, incurred by or asserted against such
 Indemnified Party arising out of, in connection with, or relating to, any breach of any covenant
 or representation made by the Indemnifying Party in this Confirmation or the ISDA Form, regulatory
 filings made by the Indemnifying Party related to the Transaction (other than as relates
 to any information provided by or on behalf of the other party or its affiliates); provided
 that neither party will be liable under the foregoing indemnification provision to the extent
 that any loss, claim, damage, liability or expense is found in a non-appealable judgment
 by a court of competent jurisdiction to have resulted from the other party's material
 breach of any covenant, representation or other obligation in this Confirmation or the ISDA
 Form or from the other party's willful misconduct, gross negligence or bad faith in
 performing the services that are subject of the Transaction. If for any reason the foregoing
 indemnification is unavailable to any Indemnified Party or insufficient to hold harmless
 any Indemnified Party, then the applicable Indemnifying Party shall contribute, to the maximum
 extent permitted by law, to the amount paid or payable by the Indemnified Party as a result
 of such loss, claim, damage or liability. In addition (and in addition to any other Reimbursement
 of Legal Fees and other Expenses contemplated by this Confirmation), the applicable Indemnifying
 Party will reimburse any Indemnified Party for all reasonable, out-of-pocket, expenses (including
 reasonable counsel fees and expenses) as they are incurred in connection with the investigation
 of, preparation for or defense or settlement of any pending or threatened claim or any action,
 suit or proceeding arising therefrom, whether or not such Indemnified Party is a party thereto
 and whether or not such claim, action, suit or proceeding is initiated or brought by or on
 behalf of the applicable Indemnifying Party. The Indemnifying Party also agrees that no Indemnified
 Party shall have any liability to the applicable Indemnifying Party or any person asserting
 claims on behalf of or in right of the applicable Indemnifying Party in connection with or
 as a result of any matter referred to in this Confirmation except to the extent that any
 losses, claims, damages, liabilities or expenses incurred by the applicable Indemnifying
 Party result from such Indemnified Party's breach of any covenant, representation or
 other obligation in this Confirmation or the ISDA Form or from the gross negligence, willful
 misconduct or bad faith of the Indemnified Party or breach of any U.S. federal or state securities
 laws or the rules, regulations or applicable interpretations of the Securities and Exchange
 Commission. The provisions of this paragraph shall survive the completion of the Transaction
 contemplated by this Confirmation and any assignment and/or delegation of the Transaction
 made pursuant to the ISDA Form or this Confirmation shall inure to the benefit of any permitted
 assignee.

(e) *<u>Amendments to Equity Definitions</u>* .

&nbsp;&nbsp;&nbsp;&nbsp;(i) Section 11.2(a) of the Equity Definitions
 is hereby amended by (i) replacing the words "a diluting or concentrative" with
 the word "an" and adding the phrase "or such Transaction" at the
 end thereof;

&nbsp;&nbsp;&nbsp;&nbsp;(ii) The first sentence of Section 11.2(c)
 of the Equity Definitions, prior to clause (A) thereof, is hereby amended to read as follows:
 '(c) If "Calculation Agent Adjustment" is specified as the Method of Adjustment
 in the related Confirmation of a Share Option Transaction or Share Forward Transaction, then,
 following the announcement or occurrence of any Potential Adjustment Event, the Calculation
 Agent will determine whether such Potential Adjustment Event has an economic effect on the
 Transaction and, if so, will (i) make appropriate adjustment(s), if any, to any one or more
 of:' and the portion of such sentence immediately preceding clause (ii) thereof is
 hereby amended by deleting the words "diluting or concentrative".

&nbsp;&nbsp;&nbsp;&nbsp;(iii) Section 11.2(e)(vii) of the Equity
 Definitions is hereby amended by (i) replacing the words "a diluting or concentrative"
 with the word "an" and (ii) adding the phrase "or the relevant Transaction"
 at the end thereof;

&nbsp;&nbsp;&nbsp;&nbsp;(iv) Section 12.6(a)(ii) of the Equity Definitions
 is hereby amended by (i) deleting from the fourth line thereof the word "or"
 after the word "official" and inserting a comma therefor, and (ii) deleting the
 semi-colon at the end of subsection (B) thereof and inserting the following words therefor
 "or (C) the occurrence of any of the events specified in Section 5(a)(vii)(1) through
 (9) of the ISDA Form with respect to that Issuer";

&nbsp;&nbsp;&nbsp;&nbsp;(v) Section 12.6(c)(ii) of the Equity Definitions
 is hereby amended by replacing the words "the Transaction will be cancelled,"
 in the first line with the words "Seller will have the right, which it must exercise
 or refrain from exercising, as applicable, in good faith acting in a commercially reasonable
 manner, to cancel the Transaction,"; and

&nbsp;&nbsp;&nbsp;&nbsp;(vi) Section 12.9(b)(i) of the Equity Definitions
 is hereby amended by (i) replacing "either party may elect" with "Seller
 may elect" and (ii) replacing "notice to the other party" with "notice
 to Counterparty" in the first sentence of such section.

(f) *<u>Waiver of Jury Trial</u>* . Each
 party waives, to the fullest extent permitted by applicable law, any right it may have to
 a trial by jury in respect of any suit, action or proceeding relating to the Transaction.
 Each party (i) certifies that no representative, agent or attorney of either party has represented,
 expressly or otherwise, that such other party would not, in the event of such a suit, action
 or proceeding, seek to enforce the foregoing waiver and (ii) acknowledges that it and the
 other party have been induced to enter into the Transaction, as applicable, by, among other
 things, the mutual waivers and certifications provided herein.

(g) *<u>Attorney and Other Fees</u>* . In
 the event of any legal action initiated by any party arising under or out of, in connection
 with or in respect of, this Confirmation or the Transaction, the prevailing party shall be
 entitled to reasonable attorneys' fees, costs and expenses incurred in such action,
 as determined and fixed by the court.

&nbsp;&nbsp;&nbsp;&nbsp;(h) *<u>Tax Disclosure</u>* . Effective from the date of commencement of discussions concerning the
 Transaction, Counterparty and each of its employees, representatives, or other agents may
 disclose to any and all persons, without limitation of any kind, the tax treatment and tax
 structure of the Transaction and all materials of any kind (including opinions or other tax
 analyses) that are provided to Counterparty relating to such tax treatment and tax structure.

(i) *<u>Securities Contract; Swap Agreement</u>* .
 The parties hereto intend for (i) the Transaction to be (a) a "securities contract"
 as defined in the Bankruptcy Code, in which case each payment and delivery made pursuant
 to the Transaction is a "termination value," "payment amount" or
 "other transfer obligation" within the meaning of Section 362 of the Bankruptcy
 Code and a "settlement payment," within the meaning of Section 546 of the Bankruptcy
 Code, and (b) a "swap agreement" as defined in the Bankruptcy Code, with respect
 to which each payment and delivery hereunder or in connection herewith is a "termination
 value," "payment amount" or "other transfer obligation" within
 the meaning of Section 362 of the Bankruptcy Code and a "transfer," as such term
 is defined in Section 101(54) of the Bankruptcy Code and a "payment or other transfer
 of property" within the meaning of Sections 362 and 546 of the Bankruptcy Code, and
 the parties hereto to be entitled to the protections afforded by, among other Sections, Sections
 362(b)(6), 362(b)(17), 546(e), 546(g), 555 and 560 of the Bankruptcy Code, (ii) a party's
 right to liquidate, terminate and accelerate the Transaction and to exercise any other remedies
 upon the occurrence of any Event of Default under the ISDA Form with respect to the other
 party to constitute a "contractual right" as described in the Bankruptcy Code,
 and (iii) each payment and delivery of cash, securities or other property hereunder to otherwise
 constitute a "margin payment" or "settlement payment" and a "transfer"
 as defined in the Bankruptcy Code.

(i) *<u>Process Agent</u>* .
 For the purposes of Section 13(c) of the ISDA Form:

Seller appoints as its Process Agent: None

Counterparty appoints as its Process Agent: None.

*[Signature page follows]*

Please confirm that the foregoing correctly sets forth the terms of our agreement by executing a copy of this Confirmation and returning it to us at your earliest convenience.

---

| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| **HARRADEN CIRCLE INVESTORS, LP** | **HARRADEN CIRCLE INVESTORS, LP** |
| **HARRADEN CIRCLE SPECIAL** | **HARRADEN CIRCLE SPECIAL** |
| **OPPORTUNITIES, LP** | **OPPORTUNITIES, LP** |
| **HARRADEN CIRCLE STRATEGIC** | **HARRADEN CIRCLE STRATEGIC** |
| **INVESTMENTS, LP** | **INVESTMENTS, LP** |
| **HARRADEN CIRCLE CONCENTRATED,** | **HARRADEN CIRCLE CONCENTRATED,** |
| **LP** | **LP** |
| By: | /s/ Frederick V. Fortmiller |
| Name: | Frederick V. Fortmiller |
| Title: | Authorized Signatory |

---

---

| | |
|:---|:---|
| Agreed and accepted by: | Agreed and accepted by: |
| **Haymaker Acquisition Corp. 4** | **Haymaker Acquisition Corp. 4** |
| By: | /s/ Christopher Bradley |
| Name: | Christopher Bradley |
| Title: | Chief Executive Officer and Chief Finanical Officer |
| **Concrete Partners Holding, LLC** | **Concrete Partners Holding, LLC** |
| By: |  |
| Name: |  |
| Title: |  |
| **Suncrete, Inc.** | **Suncrete, Inc.** |
| By: | /s/ Christopher Bradley |
| Name: | Christopher Bradley |
| Title: | Vice President |

---

**SCHEDULE A**

**FORM OF PRICING DATE NOTICE**

---

| | |
|:---|:---|
| **Date:** | April [\*], 2026 |
| **To:** | Haymaker Acquisition Corp. 4, a Cayman Islands exempted company ("**Counterparty**") |
| **Address:** |  |
| **Phone:** |  |
| **From:** | Harraden Circle Investors, LP, Harraden Circle Special Opportunities, LP, Harraden Circle Strategic Investments, LP, and Harraden Circle Concentrated, LP (collectively "Seller") |
| **Re:** | **OTC Equity Prepaid Forward Transaction** |

---

1. This Pricing Date Notice supplements, forms
 part of, and is subject to the Confirmation Re: Prepaid Share Forward Transaction, dated
 as of April 6, 2026 (the "**Confirmation** "), between Counterparty and Seller,
 as amended and supplemented from time to time. All provisions contained in the Confirmation
 govern this Pricing Date Notice except as expressly modified below.

2. The purpose of this Pricing
 Date Notice is to confirm certain terms and conditions relating to the transaction described
 in the Confirmation.

Number of Shares:[____]

## Exhibit 99.1

**Exhibit 99.1**

**NON-REDEMPTION AGREEMENT**

THIS NON-REDEMPTION AGREEMENT (this "***Agreement***"), dated as of April 1, 2026, is made by and between Haymaker Acquisition Corp. 4, a Cayman Islands exempted company (the "***Company***") and the undersigned shareholder (the "***Holder***").

**RECITALS**

WHEREAS, the Company has entered into the Business Combination Agreement ("***Business Combination Agreement***"), dated as of October 9, 2025, with Concrete Partners Holding, LLC (the "***Target***") and certain other persons, which provides, among other things, for the business combination of the Company and the Target (collectively, the "***Business Combination***");

WHEREAS, the Company's amended and restated memorandum and articles of association, as amended (the "***Articles***"), provides that a shareholder of the Company may redeem its Class A ordinary shares, par value $0.0001 per share, initially sold as part of the units in the Company's initial public offering (whether they were purchased in such initial public offering or thereafter in the open market) (the "***Public Shares***") in connection with the consummation of the Business Combination, on the terms set forth in the Articles ("***Redemption Rights***");

WHEREAS, Holder exercised its Redemption Rights with respect to 250,000 Public Shares held by it and/or its controlled affiliates as of the date hereof (the "***Holder's Shares***") and wishes to reverse such exercise (the "***Redemption Reversal***"), and to agree not to further exercise its Redemption Rights with respect to the Holder's Shares, to hold the Holder's Shares through the consummation of the Business Combination (the "***Closing Date***"), and to agree to vote the Holder's Shares in favor of the Business Combination and related matters set forth herein, all in consideration for the Payment (as defined below).

NOW, THEREFORE, in consideration of the foregoing and the mutual acknowledgments, understandings, and agreements contained in this Agreement and for other good and valuable consideration, the receipt and adequacy of which are hereby acknowledged, the Company and Holder hereby agree as follows:

1. <u>Representations and Warranties of Holder.</u> Holder represents and warrants that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Following the Redemption Reversal, Holder and/or certain of its controlled affiliates beneficially own the Holder's Shares.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) If Holder is a natural person, he or she has all the requisite power and authority and has taken all action necessary in order to execute and deliver this Agreement, to perform his or her obligations hereunder and to consummate the transactions contemplated hereby. If Holder is not a natural person, (i) it is a legal entity duly organized, validly existing and, to the extent such concept is applicable, in good standing under the laws of the jurisdiction of its organization and (ii) has all requisite corporate or other power and authority and has taken all corporate or other action necessary in order to execute, deliver and perform its obligations under this Agreement and to consummate the transactions contemplated hereby. This Agreement has been duly executed and delivered by Holder and, assuming due authorization and execution by each other party hereto, constitutes a valid and binding agreement of Holder enforceable against Holder in accordance with its terms, subject to applicable bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and similar laws affecting creditors' rights generally and subject, as to enforceability, to general principles of equity.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) The execution and delivery of this Agreement by Holder does not, and the performance by Holder of its obligations hereunder will not, (i) conflict with or result in a violation of the organizational documents of Holder (if Holder is not a natural person) or applicable law to which Holder or the Holder's Shares is subject, or (ii) require any consent or approval that has not been given or other action that has not been taken by any Person (including under any contract binding upon Holder or any Holder's Shares), in each case, to the extent such consent, approval or other action would prevent, enjoin or materially delay the performance by Holder of its obligations under this Agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) As of the date of this Agreement, (i) there is no action, claim, suit, audit, assessment, arbitration, mediation or inquiry, or any proceeding or investigation, by or before any governmental authority pending against Holder or, to the knowledge of Holder, threatened against Holder and (ii) Holder is not a party to or subject to the provisions of any order, judgment, injunction, decree, writ, stipulation, determination or award, in each case, entered by or with any governmental authority, in each case, that questions the beneficial or record ownership of the Holder's Shares or the validity of this Agreement or would reasonably be expected to prevent or materially delay, impair or adversely affect the performance by Holder of its obligations under this Agreement.

2. Redemption Reversal and <u>Waiver of Redemption Rights</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Holder shall promptly take all such actions as may be necessary to effectuate the Redemption Reversal, including submitting or causing its broker to submit a reversal demand to, and all paperwork in connection therewith requested by, the Company's transfer agent.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Holder acknowledges that, following the Redemption Reversal, it has Redemption Rights with respect to Holder's Shares pursuant to the Articles. Holder covenants and agrees, for the benefit of the Company, that neither it nor any of its controlled affiliates shall exercise any Redemption Rights under the Articles with respect to the Holder's Shares following the Redemption Reversal.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Holder and its controlled affiliates shall not directly or indirectly Transfer the Holder's Shares at any time following the Redemption Reversal through the Closing Date. As used herein, "***Transfer***" shall mean the following: (i) sale of, offer to sell, contract or agreement to sell, hypothecate, pledge, grant of any option to purchase or otherwise dispose of or agreement to dispose of, directly or indirectly, or establishment or increase of a put equivalent position or liquidation with respect to or decrease of a call equivalent position within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, and the rules and regulations of the United States Securities and Exchange Commission ("***SEC***") promulgated thereunder with respect to, any of the Holder's Shares, (ii) entry into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any of the Holder's Shares, whether any such transaction is to be settled by delivery of such securities, in cash or otherwise, or (iii) public announcement of any intention to effect any transaction specified in clause (i) or (ii).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) In furtherance of the covenants in paragraphs 2(b) and 2(c): (x) Holder hereby irrevocably waives, on behalf of itself and its controlled affiliates, the Redemption Rights, and irrevocably constitutes and appoints the Company and its designees, with full power of substitution, as its (and its controlled affiliates') true and lawful agent and attorney-in-fact, with full power and authority in its name, place and stead, to revoke any redemption election made in contravention of paragraph 2(b) above with respect to any Holder's Shares and to cause the Company's transfer agent to fail to redeem such Holder's Shares in connection with the Business Combination, (y) Holder shall deliver such documentation as is reasonably requested by the Company to evidence that none of the Holder's Shares have been redeemed or Transferred, and (z) in the event of a breach of paragraph 2(a), 2(b), or 2(c) with respect to any Holder's Shares (the "***Transferred/Redeemed Shares***"), Holder unconditionally and irrevocably agrees to, or to cause one or more of its affiliates to, subscribe for and purchase from the Company (or from its assignee(s) or designee(s)) prior to the Closing Date a number of Class A ordinary shares of the Company equal to the number of such Transferred/Redeemed Shares, for a per share purchase price equal to the amount to be received by public shareholders of the Company exercising their Redemption Rights in connection with the Business Combination.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) The Company acknowledges and agrees that the Holder and/or its controlled affiliates may own additional Public Shares in excess of the Holder's Shares (the "***Other Shares***") and that nothing herein shall restrict any rights of the Holder with respect to such Other Shares including, without limitation, the Redemption Rights or to otherwise exercise any right with respect to such Other Shares. Holder acknowledges that it will not receive any Payment with respect to any Other Shares.

3. <u>Agreement to Vote</u>. Holder covenants and agrees that its controlled affiliates shall:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) vote (or cause to be voted) or execute and deliver a written consent (or cause a written consent to be executed and delivered) at any meeting of the shareholders of the Company, however called, or at any adjournment thereof, or in any other circumstance in which the vote, consent or other approval of the shareholders of the Company is sought, all of the Holder's Shares (i) in favor of the Business Combination Agreement, the Business Combination and each other proposal brought by the Company in connection with the Business Combination, (ii) in favor of any proposal brought by the Company to adjourn the shareholder meeting called in connection with the Business Combination, (iii) against any proposal in opposition to approval of the Business Combination or in competition with or inconsistent with the Business Combination or the transactions contemplated thereby, and (iv) against any proposal, action or agreement that would (1) impede, frustrate, prevent or nullify any provision of this Agreement or the transactions contemplated hereby, or (2) change in any manner the dividend policy or capitalization of, including the voting rights of any class of capital shares of, the Company; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) appear at any meeting of the shareholders of the Company, however called, or at any adjournment thereof, in person or by proxy, or otherwise cause all of the Holder's Shares to be counted as present thereat for purposes of establishing a quorum.

4. <u>Covenants of the Holder</u>. Holder hereby agrees to permit the Company to publish and disclose Holder's identity, ownership of the Holder's Shares and any Other Shares and the nature of Holder's commitments, arrangements and understandings under this Agreement and a copy of this Agreement, in (a) the proxy materials filed by the Company with the SEC in connection with the Business Combination, (b) any Form 8-K filed by the Company with the SEC in connection with the execution and delivery of this Agreement, or in connection with the Business Combination, and (c) any other documents or communications provided by the Company or the Company to any governmental authority or to the Holder, in each case, to the extent required by the federal securities laws or the SEC or any other securities authorities. Holder agrees that it shall not, and shall cause its Affiliates not to, indirectly accomplish or attempt to accomplish that which it is not permitted to accomplish directly under this Agreement.

5. <u>Closing Payment</u>. Conditioned upon the Holder delivering evidence reasonably satisfactory to the Company that the Holder has completed the Redemption Reversal and, following the Redemption Reversal has continued to hold the Holder's Shares through the Closing Date and has complied with each of the covenants set forth in paragraphs 2 and 3 of this Agreement, within two business days following the Closing Date the Company shall pay to the Holder, by wire transfer of immediately available funds to account(s) designated by the Holder, an amount in cash equal to the product of (a) the excess of (i) the redemption price per Public Share paid by the Company to redeeming shareholders in satisfaction of their Redemption Rights over (ii) $10.75, multiplied by (b) the Holder's Shares (the "***Payment***").

6. <u>Miscellaneous.</u>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) Holder acknowledges that the Company will rely on the representations, warranties, acknowledgments, understandings and agreements contained in this Agreement. Holder agrees to promptly notify the Company if any of the representations, warranties, acknowledgments, understandings or agreements set forth herein are no longer accurate in all material respects.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Each of the Company and the Holder is entitled to rely upon this Agreement and is irrevocably authorized to produce this Agreement or a copy hereof to any interested party in any administrative or legal proceeding or official inquiry with respect to the matters covered hereby.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Neither this Agreement nor any rights that may accrue to Holder hereunder may be transferred or assigned. Neither this Agreement nor any rights that may accrue to the Company hereunder may be transferred or assigned.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) This Agreement may not be modified, waived or terminated except by an instrument in writing, signed by the party against whom enforcement of such modification, waiver, or termination is sought.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) This Agreement constitutes the entire agreement, and supersedes all other prior agreements, understandings, representations and warranties, both written and oral, among the parties, with respect to the subject matter hereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) Except as otherwise provided herein, this Agreement shall be binding upon, and inure to the benefit of the parties hereto and their heirs, executors, administrators, successors, legal representatives, and permitted assigns, and the agreements, representations, warranties, covenants and acknowledgments contained herein shall be deemed to be made by, and be binding upon, such heirs, executors, administrators, successors, legal representatives and permitted assigns,

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g) Holder acknowledges that the Company has established a trust account containing the proceeds of its initial public offering and from certain private placements (collectively, with interest accrued from time to time thereon, the "***Trust Account***"). Holder agrees that, as a result of entering into this Agreement, (i) it has no right, title, interest or claim of any kind in or to any monies held in the Trust Account, and (ii) it shall have no right of set-off or any right, title, interest or claim of any kind ("***Claim***") to, or to any monies in, the Trust Account, in each case in connection with this Agreement, and hereby irrevocably waives any Claim to, or to any monies in, the Trust Account that it may have in connection with this Agreement or otherwise; *provided,* that such release and waiver of Claims shall not include any rights or claims of Holder or any of its controlled affiliates to exercise Redemption Rights with respect to the Other Shares. In the event Holder has any Claim against the Company, Holder shall pursue such Claim solely against the Company's assets outside the Trust Account and not against the property or any monies in the Trust Account. Holder agrees and acknowledges that such waiver is material to this Agreement and has been specifically relied upon by the Company to induce the Company to enter into this Agreement and Holder further intends and understands such waiver to be valid, binding and enforceable under applicable law. In the event Holder commences any action or proceeding which seeks, in whole or in part, relief against the funds held in the Trust Account or distributions therefrom or any of the Company's shareholders, whether in the form of monetary damages or injunctive relief, Holder shall be obligated to pay to the Company all of its legal fees and costs reasonably incurred in connection with any such action in the event that the Company prevails in such action or proceeding.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) If any provision of this Agreement shall be invalid, illegal or unenforceable, the validity, legality or enforceability of the remaining provisions of this Agreement shall not in any way be affected or impaired thereby and shall continue in full force and effect.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) This Agreement may be executed in two (2) or more counterparts (including by electronic means), all of which shall be considered one and the same agreement and shall become effective when signed by each of the parties and delivered to the other parties, it being understood that all parties need not sign the same counterpart.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(j) Holder shall pay all of its own expenses in connection with this Agreement and the transactions contemplated hereby.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(k) Any notice or communication required or permitted hereunder shall be in writing and either delivered personally, emailed, sent by overnight mail via a reputable overnight carrier, or sent by certified or registered mail, postage prepaid, and shall be deemed to be given and received (a) when so delivered personally, (b) when sent, with no mail undeliverable or other rejection notice, if sent by email, or (c) five (5) business days after the date of mailing to the address below or to such other address or addresses as such person may hereafter designate by notice given hereunder:

If to Holder, to such address or addresses set forth on the signature page hereto;

If to the Company, to:

Haymaker Acquisition Corp. 4

324 Royal Palm Way, Suite 300-i

Palm Beach, Florida 33480

Attention: Christopher Bradley

Email: cbradley@mistralequity.com

with a required copy to (which copy shall not constitute notice):

DLA Piper LLP (US)

1251 Avenue of the Americas, 27<sup>th</sup> Floor

Attention: Sidney Burke, Stephen P. Alicanti

Email: sidney.burke@us.dlapiper.com, stephen.alicanti@us.dlapiper.com

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(l) The parties agree that irreparable damage for which monetary damages, even if available, would not be an adequate remedy, would occur in the event that the parties do not perform their obligations under the provisions of this Agreement (including failing to take such actions as are required of them hereunder to consummate this Agreement) in accordance with its specified terms or otherwise breach such provisions. The parties acknowledge and agree that (i) the parties shall be entitled to an injunction, specific performance, or other equitable relief, to prevent breaches of this Agreement and to enforce specifically the terms and provisions hereof, without proof of damages, this being in addition to any other remedy to which they are entitled under this Agreement, and (ii) the right of specific enforcement is an integral part of the transactions contemplated by this Agreement and without that right, none of the parties would have entered into this Agreement. Each party agrees that it will not oppose the granting of specific performance and other equitable relief on the basis that the other parties have an adequate remedy at law or that an award of specific performance is not an appropriate remedy for any reason at law or equity. The parties acknowledge and agree that any party seeking an injunction to prevent breaches of this Agreement and to enforce specifically the terms and provisions of this Agreement in accordance with this paragraph 6(l) shall not be required to provide any bond or other security in connection with any such injunction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(n) This Agreement, and all claims or causes of action based upon, arising out of, or related to this Agreement or the transactions contemplated hereby, shall be governed by, and construed in accordance with, the laws of the State of Delaware, without giving effect to principles or rules of conflict of laws to the extent such principles or rules would require or permit the application of laws of another jurisdiction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(o) Any claim, action, suit, assessment, arbitration or proceeding based upon, arising out of or related to this Agreement, or the transactions contemplated hereby, shall be brought in the State of New York, and each of the parties irrevocably submits to the exclusive jurisdiction of each such court in any such claim, action, suit, assessment, arbitration or proceeding, waives any objection it may now or hereafter have to personal jurisdiction, venue or to convenience of forum, agrees that all claims in respect of such claim, action, suit, assessment, arbitration or proceeding shall be heard and determined only in any such court, and agrees not to bring any claim, action, suit, assessment, arbitration or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby in any other court. Nothing herein contained shall be deemed to affect the right of any party to serve process in any manner permitted by law, or to commence legal proceedings or otherwise proceed against any other party in any other jurisdiction, in each case, to enforce judgments obtained in any claim, action, suit, assessment, arbitration or proceeding brought pursuant to this paragraph 6(n). EACH OF THE PARTIES HERETO HEREBY IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY ACTION BASED UPON, ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(p) Holder hereby covenants and agrees that, except for this Agreement, it (i) shall not enter into at any time while this Agreement remains in effect, any voting agreement or voting trust with respect to the Holder's Shares and (ii) shall not grant at any time while this Agreement remains in effect a proxy, consent or power of attorney with respect to the Holder's Shares that is inconsistent with this Agreement.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(q) Nothing contained in this Agreement shall be deemed to vest in the Company or its subsidiaries any direct or indirect ownership or incidence of ownership of or with respect to the Holder's Shares. All rights, ownership and economic benefits of and relating to the Holder's Shares of the Holder shall remain fully vested in and belong to the Holder, and none of the Company or its subsidiaries shall have no authority to direct the Holder in the voting or disposition of any of the Holder's Shares, except as otherwise provided herein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(r) Holder hereby agrees that its representations, warranties and covenants set forth herein are solely for the benefit of the Company and its subsidiaries in accordance with and subject to the terms of this Agreement, and this Agreement is not intended to, and does not, confer upon any person other than the parties hereto any rights or remedies hereunder, including the right to rely upon the representations and warranties set forth herein, and the parties hereto hereby further agree that this Agreement may only be enforced against, and any action that may be based upon, arise out of or relate to this Agreement, or the negotiation, execution or performance of this Agreement may only be made against, the persons expressly named as parties hereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(s) If any provision of this Agreement is held invalid or unenforceable by any court of competent jurisdiction, the other provisions of this Agreement shall remain in full force and effect. The parties further agree that if any provision contained herein is, to any extent, held invalid or unenforceable in any respect under the laws governing this Agreement, they shall take any actions necessary to render the remaining provisions of this Agreement valid and enforceable to the fullest extent permitted by law and, to the extent necessary, shall amend or otherwise modify this Agreement to replace any provision contained herein that is held invalid or unenforceable with a valid and enforceable provision giving effect to the intent of the parties.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(t) This Agreement and the obligations of each of the parties hereunder shall terminate upon the earlier to occur of (i) the termination of the Business Combination Agreement, (ii) the liquidation or dissolution of the Company, or (iii) the mutual written agreement of the parties hereto.

*[Signature Page Follows]*

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed as of the date first above written.

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| |
|:---|
| **COMPANY:** |
| HAYMAKER ACQUISITION CORP. 4 |
| By: |
| Name: |
| Title: |
| **HOLDER:** |
| [ ] |
| By: |
| Name: |
| Title: |
| Address for Notices: |
| Attention: |
| Email: |

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[*Signature Page to Non-Redemption Agreement*]