Celltrion

Dear Valued Shareholders,

Following the completion of the bonus share issuance, and as previously announced on May 26, the Company will move forward with a series of measures aimed at enhancing shareholder value and reinforcing responsible management.

The Company plans to implement a total share acquisition program of KRW 270 billion, including KRW 100 billion for treasury share buybacks, KRW 70 billion under the Employee Stock Ownership Plan (ESOP), and KRW 100 billion for the acquisition of shares by Celltrion Holdings.

In accordance with applicable regulations, the Company will initiate treasury share buybacks of KRW 100 billion starting June 8, following the record date for the bonus share allocation. The final number of shares to be acquired will be determined and disclosed in line with relevant procedures.

The Company will also proceed with ESOP purchases totaling KRW 70 billion from June 8, reflecting employees’ confidence in the Company’s long-term growth and reinforcing alignment between employees and corporate performance.

At the group level, Celltrion Holdings will pursue share acquisitions of KRW 100 billion as part of its commitment to responsible management and corporate value enhancement. In accordance with Article 173-3 of the Financial Investment Services and Capital Markets Act and Article 200-3 of its Enforcement Decree, the process is expected to commence from June 18, 2026.

The Company continues to execute its business plan established at the beginning of the year as scheduled, with current performance tracking positively against plan. Core activities across operations, commercial execution, product development, manufacturing, and investment remain on track. In addition, the recent foreign exchange trends are contributing favorably to both operations and profitability.

The Company believes that its current market valuation does not adequately reflect its intrinsic value and long-term growth potential. We will continue to evaluate and implement a range of initiatives to enhance shareholder value, taking into account market conditions and regulatory considerations.

The Company remains committed to executing on its strategy and responsible management, driving sustainable growth and long-term shareholder value.