Fri, May 31, 2013 12:00 - Worthington Energy, Inc. (WGAS: OTCQB) - Tier Change - The symbol, WGAS, no longer is classified as OTC Pink Limited. As of Fri, May 31, 2013, WGAS resides in the OTCQB tier. You may find a complete list of tier changes at otcmarkets.com.