Correction the the debt ridden shell was delisted making it untradeable and the suspended cusip worthless . As well it should be since there is nothing left .
BioAmber no longer has any offices or facilities in Canada or the United States after completion of a CCAA Insolvency / USA Chapter 15 foreign arrangement, in which the company was liquidated & all major assets were sold off. On November 22nd, 2019' FINRA, (https://www.finra.org/about) the USA Financial Regulatory Authority officially suspended the company's CUSIP registration, thus delisting it from all tradeable stock exchanges.