Pearson PLC (PSORF: Pink Current) | Venue Change Fri, Sep 11, 2020 12:00 - Pearson PLC ( PSORF : OTC Link) - Venue Change - The symbol, PSORF, no longer trades on Grey Market. As of Fri, Sep 11, 2020, PSORF trades on OTC Link. You may find a complete list of venue changes at otcmarkets.com .