CTC Bio is a KOSDAQ-listed pharmaceutical and bio company organized around two business pillars: animal health products and human pharmaceuticals.
The company operates five domestic production sites and two research centers, using microbial fermentation, drug coating, and delivery technologies to manufacture feed additives, injectables, vaccines, improved new drugs, and generics.
The animal health segment consists of feed additives, disinfectants, and vaccines, with flagship products including CTCZYME, a feed digestive enzyme that was the first in Asia to receive FDA approval, and Bacter Phase, described as the world's first next-generation antibiotic-alternative feed additive.
CTCZYME is exported to 32 countries including those in Latin America and Canada, and the product targets specific bacteria to reduce issues of resistance and residue in animals. Production takes place at GMP-certified plants in Hwaseong, Gyeonggi Province, and Hongcheon, Gangwon Province.
The human pharmaceuticals segment consists of improved new drugs, generics, and health functional foods, with a flagship product called ONE-TOO tablet, a combination drug pairing the premature ejaculation ingredient clomipramine with the erectile dysfunction ingredient sildenafil.
The animal health segment's revenue fell from KRW 75.2 billion in 2022 to KRW 62.8 billion in 2024, reflecting weakness in both domestic and export sales.
At the end of October 2025, the largest shareholder changed from Pharma Research to Bionote, an animal diagnostics specialist, shifting the company from co-management to sole management, with the controlling figure behind both Bionote and affiliated SDB Investment being SD Biosensor chairman Cho Young-sik.