There are many articles related to the Korean entertainment industry, but there are very few descriptions and analyses of individual groups or artists. Therefore, the research topic of this paper is the influence of BTS on the expansion of its affiliated company. This paper examines the impact of BTS on the company from three perspectives: the impact of BTS on the company's profitability, the company's popularity, and the company's strategic direction. Bighit has gone from being on the brink of bankruptcy to being one of the top four entertainment companies, and it's a credit to BTS. In 2016 BTS released the album The Most Beautiful Moment in Life which made Bighit's first turnaround, and the company's name gradually began to be known to the public and received its first investment, which Bighit also relied on to get out of trouble, and in 2018 BTS released the album Love Yourself, which once again caused a sensation and started its concert tour. BTSs high popularity could lead to good popularity for new groups to be launched in the future; the success of BTS in the US and Korea also led HYBE (Original Bighit Entertainment) to focus on these markets and to launch groups such as TXT for the Korean market. Therefore, it is found that BTS has a significant impact on the expansion of the company in terms of company size, market share, company popularity, acquisition, and strategic markets.