Fri, Aug 16, 2013 08:00 - Mammoth Energy Group, Inc. (MMTE: OTC Pink Current) - Ex-Dividend - As of Mon, Aug 19, 2013, Mammoth Energy Group, Inc. traded ex-dividend. Mammoth Energy Group, Inc. will disburse a Reverse Split dividend of 0.0005 shares to shareholders of MMTE. You may find a complete list of dividends at otcmarkets.com.