[2][3] In 2018, DJ Soda signed with Highline after "House of Music" was defunct.

[4] In January 2019, Highline signed Jang Seok-hoon, previously a member of the hip hop scene super rookie Balming Tiger.

[5] In April, Highline signed Mnet's High School Rapper 3 contestant PLUMA.

[6] In 2020, Starship began expanding Highline, with a focus on artists who are prominent in subculture.

[7] In April, they signed artist Wonho, previously a member of the boy group Monsta X, to the label, who debuted in September.