Polar Asset Management reports 2.1% stake in Ribbon Acquisition (RIBB)

Rhea-AI Filing Summary

Ribbon Acquisition Corp ownership update: Polar Asset Management Partners Inc., as investment adviser to Polar Multi-Strategy Master Fund, reports beneficial ownership of 100,000 Class A Ordinary Shares (CUSIP G7552W109), representing 2.1% of the class. The filing is an Amendment No. 1 to a Schedule 13G and is signed by the fund's Chief Compliance Officer on 05/15/2026. The statement notes Ownership of 5 Percent or Less of a Class.

Insights

Institutional Ownership Analyst

Large institutional holder reports a passive sub-2.5% stake.

Polar Asset Management Partners Inc. discloses beneficial ownership of 100,000 shares or 2.1% of Ribbon Acquisition Corp Class A Ordinary Shares. The filing is presented as a Schedule 13G/A amendment and lists sole voting and dispositive power over those shares.

Because the filing states Ownership of 5 Percent or Less of a Class, this indicates a passive reporting category rather than an activist intent. Subsequent filings would show any material changes in position.

Key Figures

Shares beneficially owned: 100,000 shares Percent of class: 2.1% Filing type: Schedule 13G/A Amendment No. 1 +1 more

4 metrics

Shares beneficially owned 100,000 shares Class A Ordinary Shares (CUSIP G7552W109)

Percent of class 2.1% Ownership percentage reported on Schedule 13G/A

Filing type Schedule 13G/A Amendment No. 1 Passive ownership disclosure

Signature date 05/15/2026 Signed by Chief Compliance Officer Andrew Ma

Key Terms

Schedule 13G/A, Beneficial ownership, Sole Dispositive Power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) Ribbon Acquisition Corp Class A Ordinary Shares"

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 regulatory

"Item 4. | Ownership (a) | Amount beneficially owned: 100000"

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.

Sole Dispositive Power regulatory

"(iii) Sole power to dispose or to direct the disposition of: 100000"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

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

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Accepted by SEC EDGAR 05/15/2026 - 01:02 PM Learn about SEC filing dates

FAQ

What stake does Polar Asset Management report in Ribbon Acquisition Corp (RIBB)?

Polar Asset Management reports beneficial ownership of 100,000 Class A Ordinary Shares, which equals 2.1% of the class. The position is reported on an amended Schedule 13G and is tied to Polar Multi-Strategy Master Fund.

Who is the reporting party in this Schedule 13G/A for RIBB?

The reporting party is Polar Asset Management Partners Inc., acting as investment adviser to Polar Multi-Strategy Master Fund. The filing lists the adviser’s address as 16 York Street, Suite 2900, Toronto, Ontario.

Does the filing indicate control over the shares reported for RIBB?

The filing discloses sole voting power and sole dispositive power over 100,000 shares. It records 0 shared voting or dispositive power in the Schedule 13G/A ownership section.

What is the filing date and signature for the RIBB Schedule 13G/A amendment?

The Schedule 13G/A Amendment No. 1 is signed by Andrew Ma as Chief Compliance Officer on 05/15/2026. The cover references 03/31/2026 elsewhere in the heading information.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Ribbon Acquisition Corp

(Name of Issuer)

Class A 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

Polar Asset Management Partners Inc.

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

ONTARIO, CANADA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 100,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 100,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

100,000.00

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)

2.1 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Ribbon Acquisition Corp
(b)	Address of issuer's principal executive offices: Central Park Tower LaTour Shinjuku, Room 3001, 6-15-1 Nishi Shinjuku, Shinjuku-ku Tokyo, Japan, 160-0023
Item 2.
(a)	Name of person filing: This statement is filed by Polar Asset Management Partners Inc., a company incorporated under the laws of Ontario, Canada, which serves as the investment advisor to Polar Multi-Strategy Master Fund, a Cayman Islands exempted company ("PMSMF") with respect to the shares directly held by PMSMF.
(b)	Address or principal business office or, if none, residence: 16 York Street, Suite 2900, Toronto, Ontario, M5J 0E6
(c)	Citizenship: Canada
(d)	Title of class of securities: Class A 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).
	The Reporting Person is an investment fund manager, portfolio manager, exempt market dealer and commodity trading manager registered with the Ontario Securities Commission.
Item 4.	Ownership
(a)	Amount beneficially owned: 100000
(b)	Percent of class: 2.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 100000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 100000
	(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.
	Not Applicable
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.

Polar Asset Management Partners Inc.

Signature:	Andrew Ma
Name/Title:	Chief Compliance Officer
Date:	05/15/2026