Are you talking about making a transfer? From Interactive Brokers who used to be the best broker to transfer penny stocks to (I don't trade pennies anymore so I am not up on who may still accept pink sheet stocks from another entity): It should be noted that not all shares are DRS eligible. In general, most U.S. exchange traded securities are, but many OTC shares, as well as shares subject to a restriction and therefore held in certificate form, are not. https://ibkr.info/article/2192