Vivakor Inc. (VIVK: OTC Pink Current) | Tier Change Mon, Aug 28, 2017 12:00 - Vivakor Inc. ( VIVK : OTC Pink Current) - Tier Change - The symbol, VIVK, no longer is classified as OTC Pink Limited. As of Mon, Aug 28, 2017, VIVK resides in the OTC Pink Current tier. You may find a complete list of tier changes at otcmarkets.com .
