Extreme Biodiesel, Inc. (XTRM: Pink Current) | Tier Change Fri, Nov 06, 2020 12:00 - Extreme Biodiesel, Inc. ( XTRM : Pink Current) - Tier Change - The symbol, XTRM, no longer is classified as Pink Limited. As of Fri, Nov 06, 2020, XTRM resides in the Pink Current tier. You may find a complete list of tier changes at otcmarkets.com .