As of January 02, 2026, Per otce.fina.org Bioamber's 'CUSIP SUSPENDED' status remains.
Also an excerpt from 'Recent advances in bio-based production of top platform chemical, succinic acid: an alternative to conventional chemistry' - May 2024
"BioAmber also shared its technical know-how with Taiwan-based PTT–MCC, a JV of Mitsubishi and PTT–PLC. They are using BioAmber’s SA fermentation technology for PBS production. Presently, their 20,000 MT/year polybutylene succinate plant in Rayong, Thailand, is using BioAmber’s fermentation technology to produce bio-based SA, which is the starting feedstock to produce this biopolymer. The bio-SA has been anticipated to be embarked upon considering these industrial advancements"