OKLAHOMA CITY, June 26, 2018 (GLOBE NEWSWIRE) -- Mammoth Energy Services, Inc. (Nasdaq:TUSK) (“Mammoth”) announced today the launch of an underwritten public offering of 4,000,000 shares of its common stock by certain selling stockholders, subject to market and other conditions. The underwriter will have an option to purchase up to an additional 600,000 shares of common stock from the selling stockholders. The underwriter intends to offer the shares from time to time for sale in one or more transactions on the Nasdaq Global Select Market, in the over-the-counter market, through negotiated transactions or otherwise at market prices prevailing at the time of sale, at prices related to prevailing market prices or at negotiated prices. Mammoth will not receive any proceeds for the sale of the shares by the selling stockholders.