Bang owns a 34.74 percent stake in Big Hit Entertainment and his 12.38 million shares would value 3.2 trillion won ($2.8 billion) at Thursday's closing price of 258,000 won. Shares surged by as much as 30% in early trade before dropping back. Bang handed out 68,385 shares, worth 9.2 billion won at the IPO price, to all seven members of the boyband last month. The company has already made this transition, and economic and investment analysts have shared how the change turned out.
Big Hit's surging debut has been boosted by reports that the South Korean government may be considering allowing pop stars and other celebrities to defer their mandatory military service, meaning performers will no longer have to involuntarily put their careers on hold for two years.
That leaves a potential question mark on Big Hit Entertainment's post-IPO prospects.
Big Hit relies heavily on BTS, with the Billboard-topping group accounting for 87.7 per cent of the label's revenue in the first half of 2020, according to a regulatory filing.
That service is looming for BTS, with the eldest member of the band now required to sign up by the end of next year and the remaining six members over the following five years.
Big Hit's stock market debut came just days after Chinese nationalists erupted in anger at BTS after its leader, RM, thanked Korean War veterans for their sacrifices while receiving a reward for promoting US-South Korea relations.
It became the first K-pop act to top Billboard's Hot 100 chart last month with their first all-English song Dynamite.
BTS, one of the world's most famous K-pop groups, debuted in 2013 under the label Big Hit Entertainment.
Big Hit's offering was more than 1,000 times oversubscribed by institutional investors and more than 600 times by retail.
The listing ceremony at the Korea Exchange (KRX), attended by Big Hit founder and co-CEO Bang Si-hyuk, was broadcast live on the label's YouTube channel. Online game developer Krafton, and chat app operator Kakao's mobile banking unit KakaoBank have begun the preliminary process for listing.