(February 20, 2020, 2:14 PM EST) -- NEW YORK — A shareholder on Feb. 19 sued a hydraulic fracturing company and its officers in New York federal court, contending that during a proposed acquisition they filed a proxy statement with the U.S. Securities and Exchange Commission that omitted material facts that were necessary to make the information not false or misleading (Xavier Washington v. Tallgrass Energy LP, et al., No. 20-1458, S.D. N.Y.)....