 KATY, Texas, Feb. 4, 2022 PRNewswire -- U.S. Silica Holdings, Inc. NYSE: SLCA announced today that it will release its fourth quarter 2021 financial results before the New York Stock Exchange opens on Friday, February 25, 2022. Conference Call This release will be followed by a conference call for investors on Friday, February 25, 2022 at 7:30 a.m. 