Mizuho Financial Group (NYSE: MFG) reports July stock buybacks progress

Rhea-AI Filing Summary

Mizuho Financial Group, Inc. reported progress on its ongoing common stock repurchase program authorized under the Companies Act of Japan and its Articles of Incorporation. Between July 1 and July 31, 2026, it repurchased 3,845,100 shares of common stock for a total of ¥31,812,948,300 through market purchases utilizing a trust method.

The current authorization permits repurchases of up to 35,000,000 shares, equal to 1.4% of total shares outstanding excluding treasury stock as of June 30, 2026, for an aggregate amount of up to ¥200,000,000,000, during the period from May 18 to September 30, 2026. Cumulatively under this authorization, Mizuho has repurchased 9,147,800 shares for ¥71,386,599,400.

Filing Explained

From August 3, 2026, this filing is incorporated by reference into the prospectus forming part of Mizuho’s Form F-3 registration statement, unless superseded, making its disclosed information part of that registration document.

Key Figures

Shares repurchased in July 2026: 3,845,100 shares Aggregate repurchase price July 2026: ¥31,812,948,300 Authorized maximum shares: 35,000,000 shares +5 more

8 metrics

Shares repurchased in July 2026 3,845,100 shares Common stock repurchased July 1–31, 2026

Aggregate repurchase price July 2026 ¥31,812,948,300 Total consideration for July 1–31, 2026 repurchases

Authorized maximum shares 35,000,000 shares Maximum shares to be repurchased under current authorization

Authorized maximum amount ¥200,000,000,000 Maximum aggregate repurchase price under authorization

Authorized repurchase period May 18, 2026 to September 30, 2026 Duration of current common stock repurchase authorization

Cumulative shares repurchased 9,147,800 shares Aggregate number of shares repurchased under authorization

Cumulative amount repurchased ¥71,386,599,400 Aggregate amount paid for repurchases under authorization

Authorization as % of shares 1.4% Portion of total shares outstanding excluding treasury stock as of June 30, 2026

Key Terms

trust method, treasury stock, forward-looking statements, Private Securities Litigation Reform Act of 1995

4 terms

trust method financial

"Repurchase method: Market purchase utilizing trust method"

treasury stock financial

"1.4% of total shares outstanding excluding treasury stock as of June 30, 2026"

Treasury stock is shares that a company has bought back from the public and kept in its own control rather than retiring them. Think of it like a company holding its own tickets in a drawer: those shares no longer vote or receive dividends while held, but the company can reissue or retire them later; this reduces the number of shares available to outside investors and can boost per‑share earnings and influence ownership and stock price.

forward-looking statements regulatory

"This immediate release contains statements that constitute forward-looking statements"

Forward-looking statements are predictions or plans that companies share about what they expect to happen in the future, like estimating sales or profits. They matter because they help investors understand a company's outlook, but since they are based on guesses and assumptions, they can sometimes be wrong.

Private Securities Litigation Reform Act of 1995 regulatory

"within the meaning of the United States Private Securities Litigation Reform Act of 1995"

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FAQ

How many shares did Mizuho Financial Group (MFG) repurchase in July 2026?

Mizuho Financial Group repurchased 3,845,100 shares of its common stock in July 2026. These buybacks were executed between July 1 and July 31, 2026, through market purchases utilizing a trust method under its authorized repurchase program.

What is the total size of Mizuho Financial Group (MFG)’s current share repurchase authorization?

The current authorization allows repurchases of up to 35,000,000 shares for a total amount of up to ¥200,000,000,000. This represents 1.4% of total shares outstanding excluding treasury stock as of June 30, 2026.

How much has Mizuho Financial Group (MFG) repurchased cumulatively under the 2026 program?

Cumulatively under the current authorization, Mizuho Financial Group has repurchased 9,147,800 shares for a total of ¥71,386,599,400. These figures reflect aggregate repurchases executed since the program’s May 18, 2026 start date.

What is the authorized repurchase period for Mizuho Financial Group (MFG)’s current buyback?

The authorized repurchase period runs from May 18, 2026 to September 30, 2026. Within this window, Mizuho Financial Group may repurchase common stock up to the approved share and yen limits using market purchases via a trust method.

How is Mizuho Financial Group (MFG) executing its share repurchase program?

Mizuho Financial Group is executing its program through market purchases utilizing a trust method. This structure enables the company to repurchase common stock on the market within the authorized share and monetary caps during the defined period.

What percentage of Mizuho Financial Group (MFG)’s shares could be repurchased under the authorization?

The authorization covers up to 35,000,000 shares, which equals 1.4% of total shares outstanding excluding treasury stock as of June 30, 2026. Actual repurchases can be lower, depending on market conditions and corporate decisions.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of August 2026

Commission File Number 001-33098

Mizuho Financial Group, Inc.

(Translation of registrant’s name into English)

5-5, Otemachi 1-chome

Chiyoda-ku, Tokyo 100-8176

Japan

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F. Form 20-F ☒ Form 40-F ☐

THIS REPORT ON FORM 6-K SHALL BE DEEMED TO BE INCORPORATED BY REFERENCE INTO THE PROSPECTUS FORMING A PART OF MIZUHO FINANCIAL GROUP, INC.’S REGISTRATION STATEMENT ON FORM F-3 (FILE NO. 333-282497) AND TO BE A PART OF SUCH PROSPECTUS FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

				Date: August 3, 2026 Mizuho Financial Group, Inc.
				By:		/s/ Makoto Samejima
				Name:		Makoto Samejima
				Title:		Senior Managing Corporate Executive / Group CFO

August 3, 2026

		Company Name:		Mizuho Financial Group, Inc.
		Representative:		Masahiro Kihara, President and Group CEO
		Head Office:		1-5-5 Otemachi, Chiyoda-ku, Tokyo
		Code Number:		8411 (Prime Market of Tokyo Stock Exchange)

Notice regarding Progress of Repurchase of Our Common Stock

(Repurchase of our common stock pursuant to the provisions of Article 156, Paragraph 1 of the Companies Act, in accordance with the provisions of Article 459, Paragraph 1 of the Companies Act and the Articles of Incorporation of Mizuho Financial Group, Inc.)

Mizuho Financial Group, Inc. (“MHFG”) hereby announces the progress of the repurchase of its common stock pursuant to the provisions of Article 156, Paragraph 1 of the Companies Act of Japan (“Companies Act”) and in accordance with the provisions of Article 459, Paragraph 1 of the Companies Act and Article 47 of its Articles of Incorporation.

(1) Stock repurchased		MHFG common stock
(2) Aggregate shares repurchased		3,845,100 shares
(3) Aggregate repurchase price		¥31,812,948,300
(4) Repurchase period		July 1, 2026 to July 31, 2026 (trade date basis)
(5) Repurchase method		Market purchase utilizing trust method

(Reference)

1. Outline of the resolution of the meeting of the Board of Directors regarding the repurchase of common stock (May 15, 2026 and July 30, 2026)

(1) Stock to be repurchased		MHFG common stock
(2) Aggregate shares to be repurchased		Up to a maximum of 35,000,000 shares
		(1.4% of total shares outstanding excluding treasury stock as of June 30, 2026)
(3) Aggregate amount of repurchase price		Up to a maximum of ¥200,000,000,000
(4) Repurchase period		From May 18, 2026 to September 30, 2026
(5) Repurchase method		Market purchase utilizing trust method

2. Aggregate number of shares and amount repurchased pursuant to the above resolution as of July 31, 2026

Aggregate number of shares repurchased		9,147,800 shares
Aggregate amount repurchased:		¥71,386,599,400

End of document

This immediate release contains statements that constitute forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995, including estimates, forecasts, targets and plans. Such forward-looking statements do not represent any guarantee by management of future performance. Factors that could affect our financial condition and results of operations are included in “Item 3.D. Key Information—Risk Factors” and “Item 5. Operating and Financial Review and Prospects” in our most recent Form 20-F filed with the U.S. Securities and Exchange Commission (“SEC”), which is available in the Financial Information section of our web page at www.mizuhogroup.com and also at the SEC’s web site at www.sec.gov. We are under no obligation, and disclaim any obligation, to update or alter our forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by the rules of the Tokyo Stock Exchange.