X0306 4 2022-08-18 0 0001524741 U.S. SILICA HOLDINGS, INC. SLCA 0001799662 Russell Stacy C/O US SILICA HOLDINGS INC. 24275 KATY FREEWAY SUITE 600 KATY TX 77494 0 1 0 0 SVP General Counsel Common Stock 2022-08-18 4 S 0 14974 15.55 D 117922 D This is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.54 to $15.585. The reporting person undertakes to provide to U.S. Silica Holdings Inc., or any stockholder thereof, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price. /s/ Stacy Russell 2022-08-19