Billionaire Profile
Seo Jung-jin
Global Rank
#406

Image: ⓒ블루포토 홍준기 | CC BY 4.0 | via Wikimedia Commons

Seo Jung-jin

CEO, Biotech
SOUTH KOREA
Real-Time Net Worth
$8.564B
Estimated based on Biotech stock value as of March 6, 2026
+8.01% (24h)
Age
68
Source
Biotech
Industry
Healthcare
Citizenship
SOUTH KOREA

Biography

Seo Jung-jin is a South Korean entrepreneur, and the co-founder and chairman of Celltrion, a prominent biopharmaceutical company specializing in biosimilars. Born on October 23, 1957, Seo has a net worth of $13 billion, making him one of the wealthiest individuals in South Korea. His journey began with the founding of Nexol in 1999, later becoming Celltrion, after losing his job at Daewoo Motors. Seo's career is marked by his innovative approach to the biotech industry and his commitment to making healthcare more accessible through affordable alternatives to traditional biologic drugs. He has shown leadership by developing the world's first antibody biosimilar. His achievements have solidified his reputation as a visionary in the biotechnology sector.

Fact Checked
Verified by Editorial Team
Live Data
Updated 3/6/2026

Wealth Over Time

In-Depth Profile

Early Life

Seo Jung-jin was born in Cheongju, South Korea, on October 23, 1957. He graduated from Jemulpo High School and later earned degrees from Konkuk University, including a Bachelor of Industrial Engineering and a Master of Business Administration. His early career included work at Samsung Electronics and as a consultant for Daewoo Motors.

Rise to Success

Seo's career took a pivotal turn in 1999 when he founded Nexol, the predecessor to Celltrion, after the Daewoo Group was dismantled. Recognizing the potential of the then-nascent biosimilar market, he boldly entered the biotech industry. In 2002, he founded Celltrion Inc. His vision led to the development of Remsima, the world's first antibody biosimilar, which gained approval from the U.S. Food and Drug Administration. Under his leadership, Celltrion has generated billions in revenue, with the company generating $1.6 billion in revenue and $440 million in profits in 2020.

Key Business Strategies

Seo's success is attributed to his strategic focus on biosimilars, offering affordable alternatives to expensive brand-name drugs. His leadership has been marked by a willingness to innovate and take calculated risks, including securing funding through unconventional means early in Celltrion's development. Seo retired from Celltrion in March 2021 but returned as chairman in March 2023, demonstrating his continued commitment to the company's growth and vision.

Philanthropy

Seo has demonstrated his commitment to global healthcare by ensuring Celltrion's drugs are accessible to patients in need, including those in Asia.

Career Milestones

1999

Founded Nexol

Founded Nexol, the predecessor to Celltrion, after the Daewoo Group was dismantled.

2002

Founded Celltrion Inc.

Established Celltrion Inc., a biopharmaceutical company specializing in biosimilars.

2012

Developed Remsima

Successfully developed the world's first antibody biosimilar, Remsima.

2021

Retired from Celltrion

Stepped down from management as Celltrion Group established a professional management system.

2023

Returned as Chairman

Returned as chairman of the Celltrion group.

Philanthropy & Social Impact

Healthcare

Healthcare accessibility

Undisclosed

Ensuring that Celltrion's drugs are accessible to patients in need.

Controversies & Challenges

2023

Extramarital children

Seo acknowledged two children born out of wedlock. He also filed a complaint against the birth mother for blackmail and defamation. This has led to concerns about the inheritance dispute and the possibility of a governance change in the Celltrion owner's family.