Polar Asset Management reports 1.75M shares in D Boral (DBCA)

Rhea-AI Filing Summary

D Boral Acquisition I Corp: Schedule 13G filing reporting a 1,750,000-share beneficial stake. Polar Asset Management Partners Inc. states it beneficially owns 1,750,000 Class A ordinary shares (CUSIP G2616T101), representing 5.7% of the class. The filing lists sole voting and dispositive power over these shares and is signed by the firm's Chief Compliance Officer.

Insights

Institutional Ownership Analyst

Polar reports a passive >5% stake in DBCA with sole voting and dispositive power.

Polar Asset Management Partners Inc. filed a Schedule 13G showing beneficial ownership of 1,750,000 shares, equal to 5.7% of Class A ordinary shares (CUSIP G2616T101).

Because the filing is a 13G, it indicates an institutional investor reporting passive ownership; subsequent filings could change its status if activity increases.

Compliance & Regulatory Specialist

Filing attributes sole voting and dispositive authority to Polar for the reported shares.

The statement names Polar as investment advisor to Polar Multi-Strategy Master Fund and records sole power to vote and dispose of 1,750,000 shares.

Signature by the Chief Compliance Officer attests to the disclosure; any change in intent or control would require a new filing.

Key Figures

Beneficial ownership: 1,750,000 shares Percent of class: 5.7% Filing type: Schedule 13G

3 metrics

Beneficial ownership 1,750,000 shares Class A ordinary shares (CUSIP G2616T101)

Percent of class 5.7% Percent of Class A ordinary shares reported

Filing type Schedule 13G Passive institutional ownership disclosure

Key Terms

Schedule 13G, Beneficially owned, Sole dispositive power

3 terms

Schedule 13G regulatory

"This statement is filed by Polar Asset Management Partners Inc."

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.

Beneficially owned financial

"Amount beneficially owned: 1750000"

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 dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 1750000"

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.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

D Boral Acquisition I Corp

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

G2616T101

(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): G2616T101

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 1,750,000.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,750,000.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,750,000.00

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)

5.7 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: D Boral Acquisition I Corp
(b)	Address of issuer's principal executive offices: 590 Madison Ave., New York, NY, 10022
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 Number(s): G2616T101
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: 1750000
(b)	Percent of class: 5.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1750000
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1750000
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	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

FAQ

What stake does Polar Asset Management report in DBCA?

Polar Asset Management reports beneficial ownership of 1,750,000 shares in DBCA. The filing states this equals 5.7% of the Class A ordinary shares and lists CUSIP G2616T101 as the security identifier.

Does Polar have voting or dispositive power over the reported DBCA shares?

Yes. The filing states Polar has sole power to vote and sole power to dispose of 1,750,000 shares. Both sole voting and sole dispositive powers are explicitly reported in Item 4.

Which entity holds the shares reported by Polar in this Schedule 13G?

The shares are directly held by Polar Multi-Strategy Master Fund, a Cayman Islands exempted company, for which Polar Asset Management Partners Inc. serves as investment adviser. The filing names the adviser as the reporting person.

Who signed the Schedule 13G for Polar Asset Management?

The statement is signed by Andrew Ma, Chief Compliance Officer. The filing includes a signature block dated 05/15/2026, confirming the report's attestation by the firm's compliance officer.