X0206 3 2019-05-09 0 0001524741 U.S. SILICA HOLDINGS, INC. SLCA 0001776798 Carusona Zach C/O US SILICA HOLDINGS INC. 24275 KATY FREEWAY SUITE 600 KATY TX 0 1 0 0 President Specialty Minerals Common Stock 28471 D Employee Stock Option 22.09 2017-06-03 2023-06-03 Common Stock 12500 D Employee Stock Option 32.41 2018-03-02 2025-03-02 Common Stock 388 D Employee Stock Option 30.85 2018-06-01 2025-06-01 Common Stock 356 D Includes (i) 208 shares of restricted stock granted on April 1, 2017 which vest on April 1, 2020, (ii) 4,373 shares of restricted stock granted on April 1, 2018, which will vest in two equal installments on April 1, 2020 and April 1, 2021 and (iii) 17,428 shares of restricted stock granted on February 12, 2019, which will vest in three equal installments on the first, second and third anniversaries of the grant date. SEE EXHIBIT 24 - POWER OF ATTORNEY /s/ W. Andrew Macan, attorney-in-fact for Zach Carusona 2019-05-20