Casper Bradford B 4

4 · U.S. SILICA HOLDINGS, INC. · Filed Apr 3, 2020

Form 4

Period: 2020-04-01

V P of Strategic Planning

Transactions

Tax Payment
Common Stock
2020-04-01$1.55/sh−2,765$4,286→ 194,734 total
Exercise/Conversion
Restricted Stock
2020-04-01−1,173→ 0 total
→ Common Stock (1,173 underlying)
Tax Payment
Common Stock
2020-04-01$1.55/sh−887$1,375→ 194,247 total
Exercise/Conversion
Common Stock
2020-04-01+3,252→ 197,499 total
Purchase
Restricted Stock
2020-04-01−3,252→ 3,251 total
→ Common Stock (3,252 underlying)
Exercise/Conversion
Common Stock
2020-04-01+1,173→ 195,134 total

Footnotes (7)

[F1]Scheduled vesting of restricted stock units granted on April 1, 2017.
[F2]Represents tax withholding on vested restricted stock units.
[F3]Scheduled vesting of restricted stock units granted on April 1, 2018.
[F4]Includes (i) 26,010 restricted stock units granted on February 12, 2019 which will vest in two equal installments on February 12, 2020 and 20201 and (ii) 112,903 restricted stock units granted on February 6, 2020 which will vest in three equal installments on the anniversary of the grant date.
[F5]Each restricted stock unit represents a contingent right to receive one share of common stock upon vesting of the unit.
[F6]Restricted Stock Units granted on April 1, 2017 and vesting in three equal installments on the anniversaries of the grant date.
[F7]Restricted Stock Units granted on April 1, 2018 and vesting in three equal installments on the anniversaries of the grant date.

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