Readen Holding Corp. (RHCO: Pink Current) | Tier Change Fri, Nov 27, 2020 12:00 - Readen Holding Corp. ( RHCO : Pink Current) - Tier Change - The symbol, RHCO, no longer is classified as Pink Limited. As of Fri, Nov 27, 2020, RHCO resides in the Pink Current tier. You may find a complete list of tier changes at otcmarkets.com .