Mizuho (NYSE: MFG) CDO details phantom stock units and share holdings

Rhea-AI Filing Summary

Mizuho Financial Group’s Chief Digital Officer, Nobuhiro Kaminoyama, reported his initial equity-linked holdings. He holds phantom stock units tied to 19,340 shares of common stock that are fully vested and settle upon retirement, plus additional phantom stock grants covering 4,889, 3,949 and 2,451 underlying shares that vest in three equal annual installments beginning on July 1, 2026, July 1, 2025 and July 1, 2024. He also reports 13,722 shares of common stock held directly and 2,538.463 shares held indirectly through an ESOP.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Kaminoyama Nobuhiro

(Last) (First) (Middle)

C/O MIZUHO FINANCIAL GROUP, INC.

1-5-5 OTEMACHI, CHIYODA-KU

(Street)

TOKYO JAPAN 100-8176

(City) (State) (Zip)

JAPAN

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
MIZUHO FINANCIAL GROUP INC [ MFG ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Digital Officer

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	13,722	D
Common Stock	2,538.463	I	By ESOP

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Phantom Stock Units - Retirement	(1)	(1)	Common Stock	19,340	(2)	D
Phantom Stock Units	(3)	(3)	Common Stock	4,889	(2)	D
Phantom Stock Units	(4)	(4)	Common Stock	3,949	(2)	D
Phantom Stock Units	(5)	(5)	Common Stock	2,451	(2)	D

Explanation of Responses:

1. These phantom stock units are fully vested and settle upon the Reporting Person's retirement from the Company.

2. Each phantom stock unit represents a contingent right to receive one share of Issuer Common Stock, which will be settled in cash or common stock upon settlement at the Issuer's election.

3. These phantom stock units vest in three equal annual installments beginning on July 1, 2026.

4. Represents the unvested portion of a grant of phantom stock units which vest in three equal annual installments beginning on July 1, 2025.

5. Represents the unvested portion of a grant of phantom stock units which vest in three equal annual installments beginning on July 1, 2024.

Remarks:

Exhibit List: Exhibit 24 - Power of Attorney.

	/s/ Yuki Nishii, as Attorney-In-Fact	03/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does the Mizuho (MFG) Form 3 filing by Nobuhiro Kaminoyama show?

The filing shows Chief Digital Officer Nobuhiro Kaminoyama’s initial holdings in Mizuho, including phantom stock units and common shares. It details vested retirement-linked units, future vesting schedules, and both direct and ESOP-based indirect common stock positions.

How many phantom stock units tied to retirement does Mizuho’s CDO report?

He reports phantom stock units linked to 19,340 underlying shares of Mizuho common stock that are fully vested and settle upon retirement. These units represent deferred compensation whose value tracks the company’s share price at settlement.

What future vesting schedules apply to Mizuho (MFG) phantom stock units?

Kaminoyama holds phantom stock units covering 4,889, 3,949 and 2,451 underlying shares. These vest in three equal annual installments beginning on July 1, 2026, July 1, 2025 and July 1, 2024, respectively, reflecting staggered long-term incentive awards.

How many Mizuho common shares does the CDO hold directly and indirectly?

He reports 13,722 shares of Mizuho common stock held directly and 2,538.463 shares held indirectly through an employee stock ownership plan (ESOP). Together, these positions complement his phantom stock units as part of his overall equity-linked compensation.

What is a phantom stock unit in the context of Mizuho (MFG)?

A phantom stock unit is a deferred compensation right whose value mirrors one Mizuho common share. The units may settle in cash or stock at Mizuho’s election, often upon retirement or vesting dates, aligning executive incentives with shareholder outcomes over time.