Harraden group reports 20.93% stake in Haymaker Acquisition 4

Haymaker Acquisition Corp. 4 reports a Schedule 13G/A showing Harraden-related entities and Frederick V. Fortmiller, Jr. beneficially owning 4,902,989 shares of Class A common stock, representing 20.93% of the class.

Rhea-AI Filing Summary

Haymaker Acquisition Corp. 4 reports a Schedule 13G/A showing Harraden-related entities and Frederick V. Fortmiller, Jr. beneficially owning 4,902,989 shares of Class A common stock, representing 20.93% of the class.

The filing states the ownership is held across Harraden Circle funds with shared voting and dispositive power of 4,902,989 shares. Specific fund-level holdings include Harraden Circle Investors, LP: 2,487,626 shares, Harraden Special Opportunities, LP: 838,430 shares, Harraden Strategic Investments, LP: 1,041,297 shares, and Harraden Concentrated, LP: 535,636 shares. The schedules describe the reporting persons' relationships and indirect beneficial ownership via general partner and adviser roles.

Insights

Institutional Ownership Analyst

Large passive stake reported: Harraden group holds 20.93% of Class A shares.

The filing documents an aggregate beneficial ownership of 4,902,989 shares (20.93%) by Harraden-affiliated funds and related entities, with shared voting and dispositive power reported. The ownership is split across four funds, led by Harraden Circle Investors, LP at 2,487,626 shares.

Future trading or disclosures by the reporting persons will determine active engagement; subsequent Schedule 13D/A or Form 4 filings would show changes in intent or transactions.

Corporate Governance Specialist

Control links are documented through GP and adviser roles tied to Mr. Fortmiller.

The statement explains that Harraden GP is general partner of the funds, Harraden LLC is GP of Harraden GP, and Harraden Adviser manages the funds; Mr. Fortmiller is managing member of Harraden LLC and Harraden Adviser. These relationships underpin the disclosed indirect beneficial ownership.

Investors seeking changes in board representation or proposals should watch for governance disclosures from either the registrant or the Harraden group in later filings.

Key Figures

Aggregate beneficial ownership: 4,902,989 shares Percent of class: 20.93% Harraden Circle Investors, LP holdings: 2,487,626 shares +3 more

6 metrics

Aggregate beneficial ownership 4,902,989 shares Amount beneficially owned reported in Item 4

Percent of class 20.93% Percent of Class A reported in Item 4

Harraden Circle Investors, LP holdings 2,487,626 shares Fund-level holding listed in the schedule

Harraden Special Opportunities, LP holdings 838,430 shares Fund-level holding listed in the schedule

Harraden Strategic Investments, LP holdings 1,041,297 shares Fund-level holding listed in the schedule

Harraden Concentrated, LP holdings 535,636 shares Fund-level holding listed in the schedule

Key Terms

Beneficially owned, Shared dispositive power, General partner (GP), Schedule 13G/A

4 terms

Beneficially owned regulatory

"Amount beneficially owned: 4,902,989"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Shared dispositive power regulatory

"Shared Dispositive Power 4,902,989.00"

General partner (GP) financial

"Harraden GP is the general partner to Harraden Fund"

Schedule 13G/A regulatory

"This Statement is filed on behalf of the following persons (collectively, the "Reporting Persons")"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake does Harraden hold in Haymaker Acquisition Corp. 4 (HYAC)?

Harraden-affiliated entities beneficially own 4,902,989 shares, or 20.93%. The Schedule 13G/A lists aggregate beneficial ownership and shared voting and dispositive power of 4,902,989 shares as reported in the filing.

Which Harraden funds hold shares in HYAC and how many?

Holdings are split across four Harraden funds with reported amounts. Examples include Harraden Circle Investors, LP: 2,487,626 shares and Harraden Special Opportunities, LP: 838,430 shares, as shown in the filing.

Who is the individual signing the Schedule 13G/A for HYAC?

Frederick V. Fortmiller, Jr. signed the filing on behalf of the Harraden entities. The filing states Mr. Fortmiller is the managing member of Harraden LLC and Harraden Adviser and signed multiple exhibits dated 04/08/2026.

Does the filing indicate sole voting power over HYAC shares?

No sole voting power is reported; shared voting power is shown. Item 4 reports 0 shares of sole voting power and 4,902,989 shares of shared voting power for the reporting persons.

Are the Harraden entities direct or indirect beneficial owners of the HYAC shares?

The filing explains the ownership is indirect through fund and adviser relationships. Harraden GP, Harraden LLC, Harraden Adviser, and Mr. Fortmiller may be deemed to indirectly beneficially own the shares held directly by the Harraden funds.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 04/08/2026 - 06:00 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Haymaker Acquisition Corp. 4

(Name of Issuer)

Class A

(Title of Class of Securities)

G4375F108

(CUSIP Number)

04/08/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Investments, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,902,989.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,902,989.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,902,989.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

20.93 %

12

Type of Reporting Person (See Instructions)

OO, HC, IA

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Investors GP, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,902,989.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,902,989.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,902,989.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

20.93 %

12

Type of Reporting Person (See Instructions)

PN, HC

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Investors GP, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,902,989.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,902,989.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,902,989.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

20.93 %

12

Type of Reporting Person (See Instructions)

OO, HC

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Investors, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 2,487,626.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 2,487,626.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,487,626.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

10.62 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Special Opportunities, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 838,430.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 838,430.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

838,430.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.58 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Strategic Investments, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,041,297.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,041,297.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,041,297.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.45 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Harraden Circle Concentrated, LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 535,636.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 535,636.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

535,636.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.29 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP Number(s): G4375F108

1

Names of Reporting Persons

Frederick V. Fortmiller, Jr.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 4,902,989.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,902,989.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,902,989.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

20.93 %

12

Type of Reporting Person (See Instructions)

IN, HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Haymaker Acquisition Corp. 4
(b)	Address of issuer's principal executive offices: 324 Royal Palm Way, Suite 300-I, Palm Beach, Florida 33480
Item 2.
(a)	Name of person filing: This Statement is filed on behalf of the following persons (collectively, the "Reporting Persons"): i) Harraden Circle Investments, LLC ("Harraden Adviser"); ii) Harraden Circle Investors GP, LP ("Harraden GP"); iii) Harraden Circle Investors GP, LLC ("Harraden LLC"); iv) Harraden Circle Investors, LP ("Harraden Fund"); v) Harraden Circle Special Opportunities, LP ("Harraden Special Op Fund"); vi) Harraden Circle Strategic Investments, LP ("Harraden Strategic Fund"); vii) Harraden Circle Concentrated, LP ("Harraden Concentrated Fund"); and viii) Frederick V. Fortmiller, Jr. ("Mr. Fortmiller") This Statement relates to Shares (as defined herein) directly beneficially owned by Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund. Harraden GP is the general partner to Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund, and Harraden LLC is the general partner of Harraden GP. Harraden Adviser serves as investment manager to Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, Harraden Concentrated Fund, and other high net worth individuals. Mr. Fortmiller is the managing member of each of Harraden LLC and Harraden Adviser. In such capacities, each of Harraden GP, Harraden LLC, Harraden Adviser and Mr. Fortmiller may be deemed to indirectly beneficially own the Shares reported herein directly beneficially owned by Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, and Harraden Concentrated Fund.
(b)	Address or principal business office or, if none, residence: 885 Third Avenue, Suite 2600B, New York, NY 10022
(c)	Citizenship: Each of Harraden Fund, Harraden Special Op Fund, Harraden Strategic Fund, Harraden Concentrated Fund, and Harraden GP is a Delaware limited partnership. Each of Harraden LLC and Harraden Adviser is a Delaware limited liability company. Mr. Fortmiller is a citizen of the United States of America.
(d)	Title of class of securities: Class A
(e)	CUSIP No.:
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 4,902,989
(b)	Percent of class: 20.93 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 4,902,989
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 4,902,989
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See disclosure in Item 2 hereof.
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Harraden Circle Investments, LLC

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member
Date:	04/08/2026

Harraden Circle Investors GP, LP

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner
Date:	04/08/2026

Harraden Circle Investors GP, LLC

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member
Date:	04/08/2026

Harraden Circle Investors, LP

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:	04/08/2026

Harraden Circle Special Opportunities, LP

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:	04/08/2026

Harraden Circle Strategic Investments, LP

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:	04/08/2026

Harraden Circle Concentrated, LP

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr., managing member; Harraden Circle Investors GP, LLC, general partner; Harraden Circle Investors GP, LP, general partner
Date:	04/08/2026

Frederick V. Fortmiller, Jr.

Signature:	/s/ Frederick V. Fortmiller, Jr.
Name/Title:	Frederick V. Fortmiller, Jr.
Date:	04/08/2026