W. R. Berkley (HYAC) 13G/A shows 0% stake in Haymaker Acquisition Corp. 4

Rhea-AI Filing Summary

W. R. Berkley Corporation, together with subsidiary Berkley Insurance Company, reports in Amendment No. 3 to Schedule 13G that it beneficially owns 0 Class A ordinary shares of Haymaker Acquisition Corp. 4, representing 0.0% of the class as of 06/30/2026.

The filing states that W. R. Berkley has no sole or shared voting power and no sole or shared dispositive power over any of the issuer’s Class A ordinary shares. The parent holding company notes that the subsidiary involved is identified in an accompanying exhibit.

Key Figures

Beneficial ownership: 0 shares Ownership percentage: 0.0% Par value per share: $0.0001 per share

3 metrics

Beneficial ownership 0 shares Class A ordinary shares of Haymaker Acquisition Corp. 4 beneficially owned by W. R. Berkley as of 06/30/2026

Ownership percentage 0.0% Percent of HYAC Class A ordinary share class reported by W. R. Berkley

Par value per share $0.0001 per share Par value of HYAC Class A ordinary shares

Key Terms

beneficially owned, Sole Voting Power, Dispositive Power, parent holding company

4 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 0"

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.

Sole Voting Power financial

"Number of shares as to which the person has | (i) Sole power to vote"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Dispositive Power financial

"Sole power to dispose or to direct the disposition of"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

parent holding company financial

"If a parent holding company has filed this schedule"

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

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Available on EDGAR 08/06/2026 - 04:36 PM Accepted by SEC EDGAR 08/06/2026 - 04:36 PM Learn about SEC filing dates

FAQ

What ownership in HYAC does W. R. Berkley Corporation report in this Schedule 13G/A?

W. R. Berkley Corporation reports beneficial ownership of 0 Class A ordinary shares of Haymaker Acquisition Corp. 4, representing 0.0% of the class, with no voting or dispositive power over any shares.

Which securities of HYAC are covered in this W. R. Berkley 13G/A filing?

The filing covers Class A ordinary shares of Haymaker Acquisition Corp. 4, each with a par value of $0.0001 per share, and reports that W. R. Berkley currently holds none of these shares.

Does W. R. Berkley remain a 5% beneficial owner of HYAC after this amendment?

No. The amendment states beneficial ownership of 0 shares and a 0.0% ownership percentage, which is characterized as ownership of 5 percent or less of the class of HYAC’s Class A ordinary shares.

What voting power over HYAC shares does W. R. Berkley report in this 13G/A?

W. R. Berkley reports 0 shares with sole voting power and 0 shares with shared voting power, indicating it currently has no voting power over any HYAC Class A ordinary shares.

What is the role of Berkley Insurance Company in W. R. Berkley’s HYAC holdings?

Berkley Insurance Company is identified as a subsidiary in the Schedule 13G/A. It also reports 0 shares beneficially owned and 0.0% of the class, with no sole or shared voting or dispositive power over HYAC shares.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

HAYMAKER ACQUISITION CORP. 4

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

(CUSIP Number)

06/30/2026

(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 No.

1

Names of Reporting Persons

W. R. Berkley Corporation

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP No.

1

Names of Reporting Persons

Berkley Insurance Company

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 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

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)

0.0 %

12

Type of Reporting Person (See Instructions)

CO, IC

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: W. R. Berkley Corporation
(b)	Address or principal business office or, if none, residence: 475 Steamboat Road Greenwich, CT 06830
(c)	Citizenship: US
(d)	Title of class of securities: Class A ordinary shares, par value $0.0001 per share
(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: 0
(b)	Percent of class: 0 %
(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: 0
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
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 Exhibit 99.1
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 acquired and are held in the ordinary course of business and 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.

W. R. Berkley Corporation

Signature:	/s/ Richard M. Baio
Name/Title:	Richard M. Baio/Executive Vice President and Chief Financial Officer
Date:	08/05/2026

Berkley Insurance Company

Signature:	/s/ Richard M. Baio
Name/Title:	Richard M. Baio/Executive Vice President and Treasurer
Date:	08/05/2026