Mizuho reports 6.8% stake in Roman DBDR

Rhea-AI Filing Summary

Mizuho Financial Group, Inc., as a parent holding company, reports beneficial ownership of common shares of Roman DBDR Acquisition Corp. Mizuho and its affiliates may be deemed indirect beneficial owners of 1,571,027 common shares, representing 6.8% of the class, held directly by Mizuho Securities USA LLC, a wholly owned subsidiary.

Mizuho reports sole voting power and sole dispositive power over all 1,571,027 shares, with no shared voting or dispositive power. The reporting entity is organized in Japan, and the filing is signed by Managing Director Takahiro Katsura on behalf of the group.

Key Figures

Beneficially owned shares: 1,571,027 shares Percent of class: 6.8% Sole voting power: 1,571,027 shares +3 more

6 metrics

Beneficially owned shares 1,571,027 shares Common shares of Roman DBDR beneficially owned by Mizuho-related entities

Percent of class 6.8% Portion of Roman DBDR common shares beneficially owned

Sole voting power 1,571,027 shares Shares over which Mizuho reports sole power to vote

Shared voting power 0 shares Shares over which Mizuho reports shared voting power

Sole dispositive power 1,571,027 shares Shares over which Mizuho reports sole dispositive power

Shared dispositive power 0 shares Shares over which Mizuho reports shared dispositive power

Key Terms

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

5 terms

beneficially owned financial

"Ownership (a) | Amount beneficially owned: 1,571,027"

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 Voting Power 1,571,027.00"

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 Dispositive Power 1,571,027.00"

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

"CUSIP Number(s): G7633M104 | Parent Holding Company"

indirect beneficial owners financial

"may be deemed to be indirect beneficial owners of said equity securities"

FAQ

What percentage of Roman DBDR (DRDB) does Mizuho Financial Group report owning?

Mizuho Financial Group reports beneficial ownership of 6.8% of Roman DBDR’s common shares. This corresponds to 1,571,027 shares, giving Mizuho sole voting and dispositive power over this stake through its subsidiary structure.

How many Roman DBDR (DRDB) shares are beneficially owned by Mizuho entities?

Mizuho-related entities report beneficial ownership of 1,571,027 Roman DBDR common shares. These shares are held directly by Mizuho Securities USA LLC, with Mizuho Financial Group, Mizuho Bank, and Mizuho Americas potentially deemed indirect beneficial owners.

Does Mizuho have sole or shared voting power over its DRDB stake?

Mizuho reports sole voting power over all 1,571,027 Roman DBDR shares it beneficially owns. The filing states 0 shares with shared voting power and similarly 0 shares with shared dispositive power, concentrating control in Mizuho’s reported entities.

Which Mizuho subsidiary directly holds the Roman DBDR (DRDB) shares?

The Roman DBDR shares are directly held by Mizuho Securities USA LLC. The filing states that Mizuho Financial Group, Mizuho Bank, and Mizuho Americas may be deemed indirect beneficial owners because Mizuho Securities USA LLC is their wholly-owned subsidiary.

What is the role of Mizuho Financial Group in this DRDB Schedule 13G?

Mizuho Financial Group files as a parent holding company reporting indirect beneficial ownership of Roman DBDR shares. It certifies that its foreign regulatory scheme is comparable to that of equivalent U.S. institutions and undertakes to provide Schedule 13D-type information upon request.

Who signed the Mizuho Financial Group Schedule 13G for DRDB and when?

The Schedule 13G is signed by Takahiro Katsura, Managing Director, Global Corporate Function Coordination Department. The signature date is 08/13/2026, confirming the reported ownership and related regulatory certifications on behalf of Mizuho Financial Group.

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

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Available on EDGAR 08/13/2026 - 06:55 AM Accepted by SEC EDGAR 08/13/2026 - 06:55 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Roman DBDR Acquisition Corp. II

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G7633M104

(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): G7633M104

1

Names of Reporting Persons

Mizuho Financial Group, 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

JAPAN

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,571,027.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,571,027.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,571,027.00

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)

6.8 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: Mizuho Financial Group, Inc., Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed to be indirect beneficial owners of said equity securities directly held by Mizuho Securities USA LLC which is their wholly-owned subsidiary.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Roman DBDR Acquisition Corp. II
(b)	Address of issuer's principal executive offices: 3300 S. Dixie Highway, Suite 179, West Palm Beach, FL 33405
Item 2.
(a)	Name of person filing: Mizuho Financial Group, Inc.
(b)	Address or principal business office or, if none, residence: 1-5-5, Otemachi, Chiyoda-ku, Tokyo, 100-8176, Japan
(c)	Citizenship: Japan
(d)	Title of class of securities: Common Shares
(e)	CUSIP Number(s): G7633M104
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).
	Parent Holding Company
Item 4.	Ownership
(a)	Amount beneficially owned: 1,571,027
(b)	Percent of class: 6.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,571,027
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,571,027
	(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.
	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 A
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. By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Parent Holding Company is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

Mizuho Financial Group, Inc.

Signature:	/s/ Takahiro Katsura
Name/Title:	Takahiro Katsura, Managing Director, Global Corporate Function Coordination Department
Date:	08/13/2026