Notice Regarding the Results of Share Repurchase through off-floor trading on Tokyo Stock Exchange (ToSTNeT-3) (Share Repurchase Pursuant to the Provisions of the Articles of Incorporation Pursuant to Paragraph 2 of Article 165 of the Companies Act)

February 9, 2026

To whom it may concern:

Name of the Company: Cosmo Energy Holdings Company, Limited

(Code: 5021 Shares Traded: TSE Prime section) Name of Representative: Shigeru Yamada,

Representative Director, Group CEO Name of Contact Person: Masahiro Oikawa,

General Manager of Corporate Communication Dept.

TEL +81-3-6743-7538

Notice Regarding the Results of Share Repurchase through off-floor trading on Tokyo Stock Exchange  (ToSTNeT-3) (Share Repurchase Pursuant to the Provisions of the Articles of Incorporation Pursuant to  Paragraph 2 of Article 165 of the Companies Act)

COSMO ENERGY HOLDINGS COMPANY, LIMITED (the “Company”) hereby announces that the Company has executed the share repurchase today followed by the announcement made on February 6, 2026, as follows:

1. Details of share repurchases

   1. Type of Shares to be Repurchased : Common shares

   2. Total Number of Shares to be Repurchased : 4,124,900 shares

   3. Aggregate Value of Repurchases : JPY 19,461,278,200

   4. Date of Repurchase : February 9, 2026

   5. Method of Repurchases : Purchase through off-floor purchase transaction (ToSTNeT-3)

2. Others

   Following the completion of the repurchase of its own shares through off-floor purchase transactions, the Company plans to conduct market purchases on the Tokyo Stock Exchange up to the volume and amount of shares after deducting the total number and amount of shares repurchased through off-floor purchase transactions from the total number and total amount of shares repurchased resolved at the Board of Directors' meeting on February 6, 2026.

   Details of the Repurchase of its own shares resolved at the Board of Directors meeting held on February 6, 2026

   1. Type of Shares to be Repurchased : Common shares

   2. Total Number of Shares to be Repurchased : 6,250,000 shares (maximum limit)

      (Ratio of the total number of issued and outstanding shares [excluding treasury shares]: 3.81％)

   3. Aggregate Value of Repurchases : JPY 25.0 billion (maximum limit)

   4. Repurchase Period : February 9, 2026 - March 31, 2026

   5. Repurchase Method:

      1. Purchase through off-floor trading on Tokyo Stock Exchange (ToSTNeT-3)

      2. Purchase by means of market trades on the Tokyo Stock Exchange

(By means of market trades based on a discretionary investment contract with a securities firm)

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