Donna Lynnette Crowder - May 12, 2021 Form 4 Insider Report for U.S. SILICA HOLDINGS, INC. (SLCA)

Role: SVP and CHRO
Signature: /s/ Matthew Rinegar, as Attorney-in-Fact
Stock symbol: SLCA
Transactions as of: May 12, 2021
Transactions value $: -$67,881
Form type: 4
Date filed: 5/13/2021, 05:46 PM
Next filing: Nov 9, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SLCA	Common Stock	Tax liability	-$67.9K	-6.09K	-4.26%	$11.15	137K	May 12, 2021	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents tax withholding on vested restricted stock units.
F2	Includes (i) 13,717 restricted stock units granted on November 7, 2019, which will vest in equal installments on November 7, 2021 and 2022; (ii) 13,441 restricted stock units granted on February 6, 2020, which will vest in equal installments on February 6, 2022 and 2023; (iii) 50,000 restricted stock units granted on May 12, 2020 which will vest in equal installments May 12, 2022 and 2023; and (iv) 20,800 restricted stock units granted on February 12, 2021 which will vest in three equal installments on the anniversary of the grant date.

Content

Represents tax withholding on vested restricted stock units.

Includes (i) 13,717 restricted stock units granted on November 7, 2019, which will vest in equal installments on November 7, 2021 and 2022; (ii) 13,441 restricted stock units granted on February 6, 2020, which will vest in equal installments on February 6, 2022 and 2023; (iii) 50,000 restricted stock units granted on May 12, 2020 which will vest in equal installments May 12, 2022 and 2023; and (iv) 20,800 restricted stock units granted on February 12, 2021 which will vest in three equal installments on the anniversary of the grant date.