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Jellyfish Entertainment

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Unclaimed

A South Korean music and artist-management company founded by composer and producer Hwang Se-jun.

Last updated August 22, 2026

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Overview

Jellyfish Entertainment is a South Korean entertainment company based in Seoul. Founded on August 17, 2007, by composer and producer Hwang Se-jun, the company began as a music agency focused on established vocalists, ballad singers, composers, and recording projects. Its early roster included Sung Si-kyung, Lisa, Park Hak-ki, Park Hyo-shin, Seo In-guk, and Lee Ji-hoon, helping establish Jellyfish as a label associated with vocal performance and producer-led projects rather than only idol-group management. The company expanded its identity through collaborative releases. Its annual Jelly Christmas project brought agency artists together for seasonal singles and albums, while the Y.Bird from Jellyfish Island project developed cross-artist collaborations involving label performers and outside musicians. These projects gave Jellyfish a recognizable house identity and provided a platform for music that did not fit a single artist's regular discography. In 2016, the company introduced Jelly Box, a digital music channel with a similar collaborative purpose. Jellyfish entered the idol-group business in 2012 with VIXX. The group was formed through the reality program MyDOL and became the agency's first major idol act. VIXX's concept-oriented releases and strong performance identity made it one of Jellyfish's most visible acts, while units such as VIXX LR broadened the group's musical presentation. The company later established a second boy group, Verivery, which debuted in 2019 and combined music releases with self-produced video and digital-content activity. The agency also developed a girl-group business. Trainees Kim Se-jeong, Kang Mi-na, and Kim Na-young appeared on Produce 101; Se-jeong and Mina subsequently became members of the temporary project group I.O.I. Jellyfish's own nine-member girl group Gugudan debuted in 2016. Although Gugudan ended group activities in 2020, members continued with individual careers in music, acting, television, and other entertainment work. The company has also represented solo singers, musical performers, actors, actresses, models, and trainees. Jellyfish's corporate structure changed during the 2010s. CJ E&M acquired a minority stake in 2013 and increased its holding in 2017, bringing Jellyfish into the CJ E&M label system while leaving it operating as an independent label. In 2020, Hwang Se-jun acquired shares previously held by CJ E&M, increasing his reported ownership position. Jellyfish has also pursued business expansion through actor-management activities, including its 2015 acquisition of The Good Entertainment's management business. More recently, Jellyfish has used televised survival programs as a route for developing and promoting talent. Its trainees participated in Produce X 101, Girls Planet 999, and Boys Planet. Kim Da-yeon entered Kep1er through Girls Planet 999, while Park Gun-wook entered ZEROBASEONE through Boys Planet. In 2023, Jellyfish announced EVNNE, a project boy group assembled from Boys Planet contestants who had not entered the program's final debut group. The agency therefore operates across artist representation, recorded music, idol-group production, digital content, acting management, concerts, soundtracks, and international distribution partnerships.

History

Jellyfish Entertainment was established in Seoul on August 17, 2007, by composer and producer Hwang Se-jun. Its initial business centered on music production and management of singers. Sung Si-kyung was the first artist signed, followed by Lisa and Park Hak-ki. Park Hyo-shin joined in 2008 and appeared on Hwang Project Vol.1 Welcome to the Fantastic World. Seo In-guk, who gained attention through Super Star K, and Lee Ji-hoon also joined during the company's early development. Beginning in 2010, Jellyfish created a recurring collaborative identity through the Jelly Christmas releases. Label artists contributed to seasonal recordings including Christmas Time, Christmas for All, and later releases. In 2012, the company staged Jellyfish Live in Tokyo and supported concerts by Sung Si-kyung and Park Hyo-shin. It also operated the Y.Bird from Jellyfish Island project, which issued collaborative digital singles involving artists such as Lee Seok-hoon, Seo In-guk, VIXX, and OKDAL. Jellyfish's most important early expansion was into idol-group production. In 2012, trainees were presented through MyDOL, a survival-style television program documenting the development of a boy group. The resulting group, VIXX, debuted on May 24, 2012. VIXX became a central act in the agency's portfolio, and the VIXX LR unit, consisting of Leo and Ravi, debuted in 2015. That same period also saw the company expand into acting management through its acquisition of The Good Entertainment management business. In December 2013, CJ E&M acquired 19 percent of Jellyfish and incorporated the agency into its label system as an independent label. Jellyfish subsequently broadened its roster and project activity. Park Yoon-ha signed in 2015, while Jellyfish launched the Jelly Box digital music channel in 2016. Jelly Box continued the agency's tradition of cross-artist releases and collaborations. The same year, Jellyfish debuted Gugudan, its first girl group, after Kim Se-jeong and Kang Mi-na had participated in I.O.I through Produce 101. The agency also added several actors and actresses during this period. CJ E&M increased its ownership to 51 percent in 2017, becoming Jellyfish's largest shareholder. Jellyfish continued to operate artist projects and debuted Gugudan sub-unit Gugudan 5959. In January 2019, it launched Verivery, a boy group that added a newer digital-content dimension to the label's idol operations. Jellyfish trainees also continued appearing on televised talent programs, including Produce X 101. The company experienced roster changes in the early 2020s. Gugudan ended group activities in December 2020, and members subsequently left the agency at different times. Jellyfish continued to manage solo musicians, actors, musical performers, and trainees. Kim Da-yeon reached the final lineup of Girls Planet 999 and debuted in Kep1er, while Park Gun-wook reached the final lineup of Boys Planet and debuted in ZEROBASEONE. In 2023, Jellyfish announced EVNNE, a project group composed of selected Boys Planet contestants who had not entered ZEROBASEONE. Jellyfish's documented activities extend beyond standard record-label work. Its business has included artist contracts, group formation, music distribution, concerts, television-related talent development, soundtracks, digital music channels, and acting management. Its history reflects the movement of South Korean entertainment agencies from singer representation into integrated management and content-production businesses.

  • 2023

    EVNNE is announced

    [1]

    Jellyfish introduces a project group assembled from Boys Planet contestants.

  • 2020

    Gugudan ends group activities

    [1]

    Jellyfish announces the group's formal disbandment at the end of the year.

  • 2019

    Verivery debuts

    [1]

    Jellyfish launches its second major boy group.

  • 2017

    CJ E&M becomes largest shareholder

    [1]

    CJ E&M's holding rises to 51 percent.

  • 2016

    Jelly Box and Gugudan launch

    [1]

    The company introduces its Jelly Box digital music channel and debuts Gugudan.

  • 2015

    The Good Entertainment management business is acquired

    [1]

    Jellyfish expands its activities in actor management.

  • 2013

    CJ E&M takes a minority stake

    [1]

    CJ E&M acquires 19 percent of the agency.

  • 2012

    VIXX debuts

    [1]

    VIXX debuts after its formation is documented on MyDOL.

  • 2010

    Jelly Christmas project begins

    [1]

    Jellyfish artists collaborate on the first Jelly Christmas holiday release.

  • 2007

    Jellyfish Entertainment is founded

    [1]

    Composer and producer Hwang Se-jun establishes Jellyfish Entertainment in Seoul.

Products and positioning

A Seoul-based, producer-led entertainment agency combining vocal music, K-pop idol development, collaborative digital projects, and multi-category artist management.

  • Boy group · 2012

    VIXX

    VIXX is Jellyfish's first major idol group. Formed through the MyDOL television project, the group debuted in 2012 and became closely associated with concept-driven K-pop releases, theatrical performance styles, and a strong visual identity. Its activities also produced the VIXX LR sub-unit.

  • Girl group · 2016

    Gugudan

    Gugudan was Jellyfish's first girl group. It debuted in 2016 after members Kim Se-jeong and Kang Mi-na gained exposure through Produce 101 and I.O.I. The group released music and formed sub-units, but Jellyfish announced the end of group activities in December 2020.

  • Boy group · 2019

    Verivery

    Verivery is Jellyfish's second major boy group, debuting in 2019. The group represents the agency's continued investment in idol production and digital content, with members participating in music, performance, and related video activities.

  • Project boy group · 2023

    EVNNE

    EVNNE is a project boy group announced in 2023. Its seven members were selected from Boys Planet contestants who did not enter the show's final debut group. The project extends Jellyfish's use of televised competition programs as a talent-development and group-formation channel.

  • Collaborative music project · 2010

    Jelly Christmas

    Jelly Christmas is Jellyfish's recurring seasonal collaboration project. It brings multiple agency artists together on holiday singles or albums and has served as a collective label showcase since 2010.

  • Digital music channel · 2016

    Jelly Box

    Jelly Box is a digital music channel launched in 2016. It provides a release platform for Jellyfish artists, producers, and collaborations with outside musicians, continuing the role previously played by Y.Bird from Jellyfish Island.

Marketing campaigns

  • 2012Jellyfish Live

    Japan

    Jellyfish staged its first live concert in Tokyo at Zepp DiverCity.

    Outcome. The event demonstrated the agency's early effort to present its roster to an overseas audience.

  • 2012Y.Bird from Jellyfish Island

    South Korea

    A producer-led digital collaboration series pairing Jellyfish artists with other singers and musicians.

    Outcome. The series produced multiple digital singles and established a model later continued by Jelly Box.

  • 2010Jelly Christmas

    South Korea

    A recurring holiday music project featuring collaborations among Jellyfish artists.

    Outcome. The project became a recurring label tradition, with later editions released in 2011, 2012, 2015, and 2016.

Brand decisions

  • 2020

    Hwang Se-jun increases control of JellyfishM&A

    Background

    CJ E&M disposed of part of its shareholding in the agency.

    Action taken

    Hwang Se-jun acquired 40,396 shares for 1.9 billion won, raising his reported stake from 51 percent to 73.53 percent.

    Aftermath

    The transaction strengthened the founder's controlling position.

    Share purchase price. 1.9 billion won (Shares sold as of June 6, 2019; transaction reported in March 2020)

  • 2020

    Gugudan activities endStrategy

    Background

    The agency reassessed the future of its first girl group after several years of activity.

    Action taken

    Jellyfish announced that Gugudan would end all group activities and disband on December 31, 2020.

    Aftermath

    Members subsequently departed or pursued individual music and acting careers under different arrangements.

  • 2016

    Launch of Jelly BoxProduct launch

    Background

    The agency wanted a flexible outlet for label artists, producers, and external collaborations.

    Action taken

    Jellyfish launched Jelly Box as a digital music channel.

    Aftermath

    The channel hosted collaborative releases including a 2016 Jelly Christmas project.

  • 2015

    Expansion into actor managementM&A

    Background

    Jellyfish broadened beyond recording artists and idol groups.

    Action taken

    The company acquired the actor-management business of The Good Entertainment.

    Aftermath

    Actors and actresses became a continuing part of the agency's roster.

  • 2013

    Jellyfish joins the CJ E&M label systemM&A

    Background

    Jellyfish sought greater distribution and corporate integration while retaining independent-label operations.

    Action taken

    CJ E&M acquired 19 percent of Jellyfish's shares.

    Aftermath

    CJ E&M later increased its holding to 51 percent in 2017.

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