W. R. Berkley (AMCI) files Schedule 13G/A showing no Alphavest ownership

Rhea-AI Filing Summary

W. R. Berkley Corporation filed Amendment No. 1 to a Schedule 13G regarding Alphavest Acquisition Corp ordinary shares, par value $0.0001 per share (CUSIP G0283A108). The filing reports that W. R. Berkley Corporation and its subsidiary Berkley Insurance Company now beneficially own 0 shares, representing 0% of this class, with no sole or shared voting or dispositive power.

Key Figures

Beneficial ownership: 0 shares Percent of class: 0% Sole voting power: 0 +5 more

8 metrics

Beneficial ownership 0 shares Amount beneficially owned by W. R. Berkley Corporation in Alphavest ordinary shares

Percent of class 0% Reported percentage of Alphavest ordinary shares owned by W. R. Berkley Corporation

Sole voting power 0 Number of Alphavest shares over which W. R. Berkley has sole voting power

Shared voting power 0 Number of Alphavest shares over which W. R. Berkley has shared voting power

Sole dispositive power 0 Alphavest shares over which W. R. Berkley can solely dispose or direct disposition

Shared dispositive power 0 Alphavest shares over which W. R. Berkley has shared dispositive power

CUSIP G0283A108 CUSIP number for Alphavest Acquisition Corp ordinary shares

Signature date 08/05/2026 Date of signatures by Richard M. Baio on the amendment

Key Terms

beneficially owned, sole voting power, dispositive power, parent holding company, +1 more

5 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

"Sole power to vote or to direct the vote: 0"

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: 0"

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, pursuant to (ii)(G)"

Schedule 13G regulatory

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

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

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Available on EDGAR 08/05/2026 - 05:28 PM Accepted by SEC EDGAR 08/05/2026 - 05:27 PM Learn about SEC filing dates

FAQ

What does W. R. Berkley’s Schedule 13G/A report for Alphavest Acquisition Corp (AMCI)?

It reports that W. R. Berkley Corporation now beneficially owns 0 Alphavest ordinary shares, representing 0% of the class, with no sole or shared voting or dispositive power remaining over these securities.

Which securities of Alphavest Acquisition Corp (AMCI) are covered in this Schedule 13G/A?

The filing covers ordinary shares of Alphavest Acquisition Corp with a par value of $0.0001 per share and CUSIP number G0283A108, as identified in the ownership disclosure section.

What percentage of Alphavest Acquisition Corp (AMCI) does W. R. Berkley now report owning?

W. R. Berkley Corporation reports owning 0% of the outstanding ordinary shares of Alphavest Acquisition Corp, with 0 shares beneficially owned and no voting or dispositive power over the class.

How much voting power over Alphavest (AMCI) shares does W. R. Berkley report?

The filing states that W. R. Berkley Corporation has 0 shares with sole voting power and 0 shares with shared voting power, indicating no ability to vote or direct the vote of Alphavest ordinary shares.

What is Berkley Insurance Company’s reported ownership in Alphavest (AMCI)?

Berkley Insurance Company, a subsidiary of W. R. Berkley, is listed with 0 shares beneficially owned, 0% of the class, and 0 sole or shared voting and dispositive power over Alphavest ordinary shares.

Who signed the Schedule 13G/A related to Alphavest Acquisition Corp (AMCI)?

The amendment is signed by Richard M. Baio as Executive Vice President and Chief Financial Officer, and separately as Executive Vice President and Treasurer, each with a signature dated 08/05/2026.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Alphavest Acquisition Corp

(Name of Issuer)

Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G0283A108

(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 Number(s): G0283A108

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 Number(s): G0283A108

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: Alphavest Acquisition Corp
(b)	Address of issuer's principal executive offices: 205 W. 37th Street, New York, New York, 10018
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: Ordinary Shares, par value $0.0001 per share
(e)	CUSIP No.: G0283A108
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