Wilks Brothers, Llc, Ten Percent Owner at Calfrac Well Services, holds 17.39M shares in Calfrac Well Services (Ticker: TSE:CFW), holds 157.50K shares in Cathedral Energy Services (Ticker: TSE:CET), holds 25.25M shares in Trican Well Service (Ticker: TOLWF). Most recently, Wilks Brothers, Llc Bought ― shares of Calfrac Well Services on Nov 27, 2017 for an estimated value of 101.66K.