Celltrion

Dear Valued Shareholders,

On January 27, 2026 (KST), U.S. President Trump announced plans to restore reciprocal tariffs on South Korean goods to levels prior to the trade agreement.

In response, our company has already established a fundamental solution to these tariff concerns by securing the Branchburg production facility in New Jersey, U.S. This strategic move allows us to structurally decouple our operations from such regulatory risks.

The Branchburg facility officially commenced operations following an opening ceremony earlier this month, attended by key local and international dignitaries. We intend to utilize this facility as our primary hub for manufacturing products destined for the U.S. market. By integrating this local production with our direct sales network, we plan to accelerate the start of manufacturing to ensure a seamless and efficient product supply.

Furthermore, we have finalized a time-phased response strategy to address any uncertainties regarding U.S. tariffs. During the transition period until the U.S. facility reaches full production capacity, we will continue our sales operations without any tariff impact, utilizing the two-year supply of inventory already stationed within the United States.

By preparing comprehensive short-term and long-term response systems on the ground in the U.S., we are positioned to ensure that our business remains unaffected by any changes in tariff policy.

We remain committed to closely monitoring local market conditions and ensuring the stable operation of our business. We will continue to provide updates to our shareholders to maintain your trust and support.

Thank you.