Stacy Russell - May 17, 2021 Form 4 Insider Report for U.S. SILICA HOLDINGS, INC. (SLCA)

Role: SVP General Counsel
Signature: /s/ Matthew Rinegar, as Attorney-in-Fact
Stock symbol: SLCA
Transactions as of: May 17, 2021
Transactions value $: -$2,955
Form type: 4
Date filed: 5/19/2021, 09:57 AM
Next filing: Aug 13, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SLCA	Common Stock	Tax liability	-$2.96K	-255	-0.21%	$11.59	123K	May 17, 2021	Direct	F1

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

Explanation of Responses:

Id	Content
F1	Includes (i) 1,043 restricted stock units granted on May 15, 2019 which will vest on May 15, 2022; (ii) 26,881 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 August 12, 2020 which will vest in three equal installments on the anniversary of the grant date; and (iv) 33,750 restricted stock units granted on February 12, 2021 which will vest in three equal installments on the anniversary of the grant date.

Content

Includes (i) 1,043 restricted stock units granted on May 15, 2019 which will vest on May 15, 2022; (ii) 26,881 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 August 12, 2020 which will vest in three equal installments on the anniversary of the grant date; and (iv) 33,750 restricted stock units granted on February 12, 2021 which will vest in three equal installments on the anniversary of the grant date.