May 15, 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 Repurchase and Cancellation 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., and cancellation of repurchased common stock pursuant to Article 178 of the Companies Act)

Mizuho Financial Group, Inc. (“MHFG”) hereby announces that its Board of Directors resolved today to repurchase 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, and cancel the repurchased common stock pursuant to Article 178 of the Companies Act.

  1. Reason for the Repurchase of Common Stock

    MHFG maintains a capital policy pursuing the optimal balance between capital adequacy, growth investment and enhancement of shareholder returns. Based on this initiative, MHFG set forth its shareholder return policy of keeping progressive increase of dividends per share, while executing flexible and intermittent share buybacks. In accordance with this policy, we decided share buybacks, based on our business results, capital adequacy, our stock price and the opportunities for growth investment, using the total payout ratio of 50% or more as a guide.

  2. Outline of Repurchase

    1. Stock to be repurchased MHFG common stock

    2. Aggregate shares to be repurchased Up to a maximum of 25,000,000 shares

      (1.0% of total shares outstanding excluding treasury stock as of March 31, 2026)

    3. Aggregate amount of repurchase price Up to a maximum of ¥100,000,000,000

    4. Repurchase period From May 18, 2026 to August 31, 2026

    5. Repurchase method Market purchase utilizing trust method

  3. Outline of Cancellation

    1. Type of stock to be cancelled: MHFG common stock

    2. Number of shares to be cancelled: All of the common stock repurchased as stated in item 2 above

    3. Scheduled cancellation date: September 24, 2026

*The actual number of shares to be cancelled will be announced after completion of the repurchase as stated in item 2 above.

(Reference) Treasury Stock held by MHFG as of March 31, 2026

Total shares outstanding (excluding treasury stock) 2,438,523,296shares

Treasury stock 51,325,298shares

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

https://www.mizuhogroup.com and also at the SEC’s web site at https://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.

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Mizuho Financial Group Inc. published this content on May 15, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on May 15, 2026 at 07:00 UTC.