Forbes January 26, 2026
John Kang

Last week’s announcement by Sam Chun Dang Pharm that it will jointly develop and commercialize a weight-loss pill, with Japanese drug maker Daiichi Sankyo, fueled a rally in the Korean company’s shares making chairman Yoon Dae-in a billionaire.

Investor optimism about the pill version of weight-loss injectables being developed by Sam Chun Dang Pharm (SCD) in South Korea has fueled a rally in its shares, which are up by more than 75% so far this month. The stock surge has propelled Yoon Dae-in, the company’s chairman, into the billionaire ranks.

Yoon, who turns 76 in March, directly and indirectly owns 34% of the company’s shares. He also has a small stake in OPTUS Pharmaceutical, the eye-drop manufacturing arm of SCD....

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