Mealey's (March 15, 2019, 12:04 PM EDT) -- HOUSTON — A group of investors on March 14 filed a class action securities lawsuit in a Texas federal court against a hydraulic fracturing company contending that it is liable under the Securities Exchange Act for material misstatements in proxy materials related to a corporate acquisition (Camelot Event Driven Fund v. Alta Mesa Resources Inc. f/k/a Silver Run Acquisition Corporation II, et al., No. 19-957, S.D. Texas)....