15C2-11 was amended last June and went into effect on Sept 28, 2021 and its purpose was to bring transparency to the markets, in particular the OTC Markets. It requires all companies, in the case of the OTC 11,000 companies, to be current with all required filings in order to be openly quoted. The SEC amended 15C2-11 essentially to protect the general public from pump & dump frauds. There is nothing in the rule to force a company to be current with filings but if they want to publically quoted they must be current. If they are not current they can still be quoted but the general public cannot see the order book and all trades are carried out among broker/dealers.