Gratomic Inc. (CBULF: Pink Current) | Venue Change Thu, Nov 19, 2020 12:00 - Gratomic Inc. ( CBULF : OTC Link) - Venue Change - The symbol, CBULF, no longer trades on Grey Market. As of Thu, Nov 19, 2020, CBULF trades on OTC Link. You may find a complete list of venue changes at otcmarkets.com .