JEIO Co., Ltd.

JEIO Co., Ltd. (Korean: 주식회사 제이오) is a South Korean advanced-materials company headquartered in Songdo-dong, Yeonsu-gu, Incheon. Its core business is the manufacture of carbon nanotubes (CNT), which are used as conductive additives in secondary batteries, and it also operates a plant engineering business providing EPC (engineering, procurement, construction) services for materials, chemical, and powder-transport plants. The company was listed on the KOSDAQ market in February 2023. JEIO's growth has been driven by the rapid expansion of the global electric-vehicle and energy-storage battery supply chain, where CNT conductive additives are increasingly used to improve battery performance. The company built its first CNT plant in Ansan with an annual capacity of 300 tons in June 2021, expanded it to 1,000 tons in November 2022, and began construction on a second Ansan plant with a planned 2,000-ton capacity in July 2023. A 1,000-ton facility at the second plant was completed in May 2024. The company has attracted investment from major industrial and financial players. In December 2021, it completed a paid-in capital increase of 10 billion won from an IBK-BNW private equity fund and 15 billion won from SK Innovation Co., Ltd. It has received technology evaluation grades of A from both the Korea Technology Finance Corporation (KIBO) and NICE D&B. In November 2022, CEO Kang Deuk-ju received a presidential commendation at the 2022 Nano Convergence Awards, and in October 2023, Executive Director Kim Ju-hee received a presidential commendation at Carbon Korea 2023. JEIO changed its English corporate name to JEIO. Co,. Ltd. in December 2023. In November 2024, media reported that Isu Petasys planned to invest 300 billion won to acquire JEIO, signaling a major ownership change. The company continues to operate from its headquarters in Incheon and its manufacturing facilities in Ansan.

JEIO Co., Ltd. is a South Korean company that has grown rapidly as a supplier of carbon nanotube (CNT) materials for the battery industry. The company is headquartered in Songdo-dong, Yeonsu-gu, Incheon, and operates manufacturing facilities in Ansan. The company's corporate history includes several key milestones. In March 2021, it obtained a license for air environment specialized construction. In April 2021, it was designated as a Global Small Giant Enterprise (글로벌강소기업) by the South Korean government. In June 2021, it completed its first Ansan plant with an annual CNT production capacity of 300 tons. In November 2021, new directors and auditors were appointed, including Hyeon Ho as director, Choi Hyo-geun as auditor, and Kim Myeong-dong as outside director. In December 2021, the company completed a paid-in capital increase of 10 billion won from an IBK-BNW private equity fund and 15 billion won from SK Innovation Co., Ltd., bringing its capital to 2.725 billion won. In March 2022, JEIO executed a stock split, reducing the par value from 5,000 won to 100 won, and received technology evaluation grades of A from both the Korea Technology Finance Corporation (KIBO) and NICE D&B. It also converted preferred shares to common shares and appointed Lee Nae-seong as an outside director. In July 2022, the headquarters moved to 263 Central-ro, Yeonsu-gu, Incheon. In September 2022, the company obtained a comprehensive plant business license for industrial environmental facility construction. In October 2022, it was selected for the '2022 Excellent Industrial Technology Achievement' award by the National Academy of Engineering of Korea. In November 2022, CEO Kang Deuk-ju received a presidential commendation at the '2022 Nano Convergence Awards' hosted by the Ministry of Trade, Industry and Energy and the Ministry of Science and ICT. Also in November 2022, the first Ansan plant was expanded to an annual CNT capacity of 1,000 tons. In February 2023, JEIO listed on the KOSDAQ market. It also acquired ownership of the second Ansan plant. In March 2023, it again received A grades from KIBO and NICE D&B. In July 2023, construction began on a 2,000-ton annual CNT facility at the second Ansan plant. In August 2023, it renewed its ISO 45001 certification. In October 2023, Executive Director Kim Ju-hee received a presidential commendation at 'Carbon Korea 2023' hosted by the Ministry of Trade, Industry and Energy. In December 2023, it renewed ISO 9001 and ISO 14001 certifications and changed its English corporate name to JEIO. Co,. Ltd. In March 2024, Kang Yo-seop was appointed as a director. In May 2024, a 1,000-ton CNT facility at the second Ansan plant was completed, and the company issued exchangeable bonds targeting treasury shares. In September 2025, the location of the head office was changed. In November 2024, media reported that Isu Petasys planned to invest 300 billion won to acquire JEIO, which would represent a significant change in ownership and potentially accelerate the company's expansion in the battery materials sector.

• Obtained air environment specialized construction license

• Designated as Global Small Giant Enterprise

• Completed first Ansan plant with 300 tons/year CNT capacity

• Appointed new directors and auditor

• Completed 10 billion won IBK-BNW PE and 15 billion won SK Innovation paid-in capital increase

• Stock split (par value 5,000 won to 100 won); received A technology grades; converted preferred shares

• Headquarters relocated to 263 Central-ro, Yeonsu-gu, Incheon

• Obtained comprehensive plant business license (industrial environmental facility construction)

• Selected for '2022 Excellent Industrial Technology Achievement' by National Academy of Engineering of Korea

• CEO Kang Deuk-ju received presidential commendation at 2022 Nano Convergence Awards; first Ansan plant expanded to 1,000 tons/year CNT

• Listed on KOSDAQ; acquired ownership of second Ansan plant

• Received A technology grades from KIBO and NICE D&B

• Began construction of 2,000 tons/year CNT facility at second Ansan plant

• Renewed ISO 45001 certification

• Executive Director Kim Ju-hee received presidential commendation at Carbon Korea 2023

• Renewed ISO 9001/14001 certifications; changed English name to JEIO. Co,. Ltd.

• Kang Yo-seop appointed as director

• Completed 1,000 tons/year CNT facility at second Ansan plant; issued exchangeable bonds targeting treasury shares

• Media reported Isu Petasys planned to invest 300 billion won to acquire JEIO

• Changed head office location

Advanced materials company specializing in carbon nanotube conductive additives for the battery industry, with complementary plant engineering capabilities.

• Carbon nanotubes (CNT) for secondary battery conductive additives

• Plant engineering EPC services for materials, chemical, and powder transport plants

1. 1JEIO official websitejeio.co.kr
2. 2제이오 (기업) - Wikipedia (Korean)ko.wikipedia.org
3. 3Wikidata Q131189508wikidata.org