Mammoth Energy Services Inc. opened an IPO of 7.5 million common shares priced between $15 and $18 each, the company said Oct. 3.

Certain selling stockholders are offering an additional 250,000 shares, and underwriters received a 30-day option to purchase about 1.16 million additional shares, which would be sold by the selling stockholders.

Mammoth Energy will not receive any of the proceeds from the sales carried out by the selling stockholders.

Mammoth Energy will list its common stock on NASDAQ under the ticker “TUSK.”

Credit Suisse Securities (USA) LLC is the book-running manager. Barclays Capital Inc. and Piper Jaffray & Co. are joint book-running managers.

Mammoth Energy Services Inc. is based in Oklahoma City.