(December 6, 2019, 7:55 AM EST) -- SAN ANTONIO — A group of institutional investors in a hydraulic fracturing services company on Nov. 22 filed a brief in Texas federal court contending that they should be appointed as the lead plaintiff in a securities class action lawsuit against the company in which the shareholders say the company violated federal law when it failed to disclose certain issues in documents it filed with the Securities and Exchange Commission in preparation for an initial public offering (IPO) (Richard Logan v. ProPetro Holding Corp., et al., No. 19-217, W.D. Texas)....