Prometheum has previously acknowledged that, when it got its approval as one of about 70 SEC-regulated alternative trading systems (ATSs), it disclosed examples of the securities it would support – a couple of which have also been marked as such by the agency. It told the regulator it could offer Flow (FLOW), Protocol Labs’ Filecoin (FIL), The Graph (GRT), Compound (COMP) and the Celo platform’s CELO, for instance.