Mizuho Financial completes ¥200B share buyback

Mizuho's cancellation is scheduled for October 23, 2026, and covers 1.0% of total shares outstanding before cancellation.

Rhea-AI Filing Summary

Mizuho Financial Group, Inc. completed its common-stock repurchases under board resolutions, with 24,352,700 shares repurchased for an aggregate repurchase price of ¥199,999,944,900 as of September 18, 2026. The repurchases used market purchases utilizing the trust method.

Cancellation of all 24,352,700 repurchased shares is scheduled for October 23, 2026; those shares equal 1.0% of total shares outstanding before cancellation. From September 1 to September 18, 2026, on a trade-date basis, the company repurchased 6,126,300 shares for ¥52,934,875,300.

Key Figures

Shares repurchased as of September 18, 2026: 24,352,700 shares Aggregate repurchase price: ¥199,999,944,900 Shares to be cancelled: 24,352,700 shares +4 more

7 metrics

Shares repurchased as of September 18, 2026 24,352,700 shares Aggregate repurchases under the board resolutions

Aggregate repurchase price ¥199,999,944,900 Repurchases under the board resolutions as of September 18, 2026

Shares to be cancelled 24,352,700 shares Cancellation scheduled for October 23, 2026

Shares to be cancelled as a portion of shares outstanding 1.0% Of total shares outstanding before cancellation

Scheduled cancellation date October 23, 2026 Cancellation of repurchased common stock

Maximum authorized repurchases 35,000,000 shares Board resolutions; 1.4% of total shares outstanding excluding treasury stock as of June 30, 2026

Maximum authorized aggregate repurchase price ¥200,000,000,000 Board resolutions

Key Terms

trust method, treasury stock, Companies Act

3 terms

trust method financial

"market purchase utilizing trust method"

treasury stock financial

"Treasury stock held by MHFG"

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.

Companies Act regulatory

"Article 178 of the Companies Act"

Companies Act is the primary law that sets the rules for forming, running and winding up corporations, covering directors’ duties, shareholder rights, financial reporting, audits and insolvency. For investors it matters because those rules determine how transparent and accountable a company must be, what protections shareholders have, and how risks are managed—think of the Act as a rulebook and referee that helps ensure fair play and reliable information for investment decisions.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many shares did MFG repurchase, and what was the aggregate price?

As of September 18, 2026, Mizuho Financial Group had repurchased 24,352,700 common shares under its board resolutions, at an aggregate repurchase price of ¥199,999,944,900. The repurchases used market purchases utilizing the trust method.

When will MFG cancel its repurchased shares?

Cancellation of all 24,352,700 repurchased common shares is scheduled for October 23, 2026. The shares represent 1.0% of total shares outstanding before cancellation.

What repurchase limits did MFG's board authorize?

The board resolutions authorized repurchases of up to 35,000,000 common shares and an aggregate repurchase price of up to ¥200,000,000,000.

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

Form 6-K: How Foreign Companies Report to the SEC →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 09/24/2026 - 06:08 AM Accepted by SEC EDGAR 09/24/2026 - 06:08 AM Learn about SEC filing dates

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 September 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:		September 24, 2026
Mizuho Financial Group, Inc.
By:		/s/ Makoto Samejima
Name:		Makoto Samejima
Title:		Senior Managing Corporate Executive / Group CFO

September 24, 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 and Completion of Repurchase of Our Common Stock, and

Cancellation of Repurchased 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., and cancellation of repurchased common stock pursuant to Article 178 of the Companies Act)

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.

The repurchase of MHFG’s common stock pursuant to the resolution of the Board of Directors meeting held on May 15, 2026 and July 30, 2026 has been completed as follows.

MHFG also announces that the number of shares to be cancelled pursuant to Article 178 of the Companies Act has been finalized, as detailed below.

1.  Progress of Repurchase of Common Stock
(1)   Stock repurchased		MHFG common stock
(2)   Aggregate shares repurchased		6,126,300 shares
(3)   Aggregate repurchase price		¥52,934,875,300
(4)   Repurchase period		September 1, 2026 to September 18, 2026 (trade date basis)
(5)   Repurchase method		Market purchase utilizing trust method
2.  Cancellation of Common Stock
(1)   Type of shares to be cancelled		MHFG common stock
(2)   Number of shares to be cancelled		24,352,700 shares
		(1.0 % of total number of outstanding shares before cancellation)

(3)   Scheduled cancellation date		October 23, 2026
(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 September 18, 2026
Aggregate number of shares repurchased		24,352,700 shares
Aggregate amount repurchased		¥199,999,944,900
3.  Outline of the resolution of the meeting of the Board of Directors regarding the cancellation of common stock (May 15, 2026 and July 30, 2026)
(1)   Type of shares to be cancelled		MHFG common stock
(2)   Number of shares to be cancelled		All of the shares repurchased as stated in item 1 above
(3)   Scheduled cancellation date		October 23, 2026
4.  Treasury stock held by MHFG as of June 30, 2026
Total shares outstanding (excluding treasury stock)				2,433,537,063 shares
Treasury stock				9,294,931 shares

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.