Celltrion, Inc. announced hiring JPMorgan Chase & Co. as advisor on the possible sale stake sale by Seo Jung-Jin, Founder of Celltrion in Celltrion, CelltrionHealthcare, Co., Ltd and Celltrion Pharm Inc. Celltrion is yet to figure out the number and the value of the deals required for the asset sales. Seo Jung-Jin said on April 16, 2013 that he will take his hands off the business he created in 2002, blaming speculative short selling against Celltrion.

"I decided to sell my company to a multinational pharmaceutical company to make it a strong one that can guard off continuous suspicions and attacks by speculative investors," Seo Jung-Jin said in a statement.