W.R. Berkley reports 7.9% stake in Ribbon Acquisition

W. R. Berkley Corporation files an Amendment to Schedule 13G/A reporting beneficial ownership of 297,589 ordinary shares of Ribbon Acquisition Corporation.

Rhea-AI Filing Summary

W. R. Berkley Corporation files an Amendment to Schedule 13G/A reporting beneficial ownership of 297,589 ordinary shares of Ribbon Acquisition Corporation. The filing shows 297,589 shares representing 7.9% of the class, with shared voting and dispositive power. Signatures are dated 05/07/2026.

Insights

Corporate Governance Analyst

Schedule 13G/A reports a passive sizable stake with shared control.

W. R. Berkley Corporation discloses ownership of 297,589 shares or 7.9% of Ribbon Acquisition Corporation with shared voting and dispositive power, indicating the stake is reported under beneficial ownership rules rather than an active acquisition disclosed by the issuer.

Future filings may show changes in holdings; timing and additional disclosures are anchored to the amendment and signature date 05/07/2026.

Key Figures

Shares beneficially owned: 297,589 shares Percent of class: 7.9% CUSIP: G7552W109 +1 more

4 metrics

Shares beneficially owned 297,589 shares Amount beneficially owned reported in Item 4(a)

Percent of class 7.9% Percent of class reported in Item 4(b)

CUSIP G7552W109 Identifier for Ribbon Acquisition ordinary shares

Signature date 05/07/2026 Signed by Richard M. Baio as Executive Vice President and CFO/Treasurer

Key Terms

Schedule 13G/A, beneficial ownership, shared dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment to Schedule 13G/A reporting beneficial ownership"

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.

beneficial ownership financial

"Item 4. | Ownership (a) | Amount beneficially owned: 297,589"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

shared dispositive power regulatory

"Shared dispositive power: 297,589.00"

FAQ

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

What stake does W.R. Berkley (RIBB) report in Ribbon Acquisition Corporation?

W. R. Berkley reports beneficial ownership of 297,589 shares, equal to 7.9% of Ribbon Acquisition Corporation's ordinary shares. The filing lists shared voting and dispositive power for those shares and is signed on 05/07/2026.

Does the Schedule 13G/A show who controls the votes for the RIBB shares?

The filing states W. R. Berkley has shared voting power over 297,589 shares. It reports no sole voting or sole dispositive power, indicating voting rights are shared with one or more entities for that position.

When was this Schedule 13G/A amendment signed for RIBB?

The amendment is signed by Richard M. Baio in dual roles with signature dates of 05/07/2026. The header also references 03/31/2026 consistent with a reporting period or record date shown in the excerpt.

Is the W.R. Berkley position reported as an active acquisition or passive holding?

This Schedule 13G/A amendment reports beneficial ownership consistent with a passive reporting form. It lists shared voting and dispositive power but does not characterize the position as an active acquisition in the provided excerpt.

What class and CUSIP are covered in the filing for Ribbon Acquisition?

The filing covers Ribbon Acquisition Corporation ordinary shares, par value $0.0001 per share, with CUSIP G7552W109. The report specifically lists the title of the class as Ordinary Shares.

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

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Accepted by SEC EDGAR 05/08/2026 - 04:03 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. 1)

Ribbon Acquisition Corporation

(Name of Issuer)

Ordinary Shares, par value $0.0001 per share

(Title of Class of Securities)

G7552W109

(CUSIP Number)

03/31/2026

(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): G7552W109

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 297,589.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 297,589.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

297,589.00

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)

7.9 %

12

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13G

CUSIP Number(s): G7552W109

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 297,589.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 297,589.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

297,589.00

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)

7.9 %

12

Type of Reporting Person (See Instructions)

CO, IC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Ribbon Acquisition Corporation
(b)	Address of issuer's principal executive offices: CENTRAL PARK TWR LATOUR SHINJUKU RM 3001, 6-15-1 Nishi Shinjuku,, Shinjuku-ku Tokyo 160-0023, Japan, 00000
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.: G7552W109
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: 297,589
(b)	Percent of class: 7.9 %
(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: 297,589
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 297,589
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 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:	05/07/2026

Berkley Insurance Company

Signature:	/s/ Richard M. Baio
Name/Title:	Richard M. Baio/Executive Vice President and Treasurer
Date:	05/07/2026