X0306 4 2022-05-12 0001524741 U.S. SILICA HOLDINGS, INC. SLCA 0001538303 KACAL WILLIAM JENNINGS C/O US SILICA HOLDINGS INC. 24275 KATY FREEWAY SUITE 600 KATY TX 77494 1 0 0 0 Common Stock 2022-05-12 4 A 0 7733 0 A 221346 D Common Stock 2600 I By Spouse Restricted Stock Units granted on May 12, 2022 and vesting on May 12, 2023. /s/ Stacy Russell, as Attorney-in-Fact 2022-05-16