SOLARIS OILFIELD INFRASTRUCT

Ticker: SEI CUSIP: 83418M103 Class: Common Stock

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC's Holding History (CIK: 0001644956)

Note: Option positions (PUT/CALL) are excluded.

Q4 2019

Shares 514,739 Value ($000) $7,206 Avg Close $9.23 Range $7.85 - $11.39

Q3 2019

Shares 727,524 Value ($000) $9,763 Avg Close $10.40 Range $9.58 - $11.75

Q2 2019

Shares 775,318 Value ($000) $11,614 Avg Close $12.55 Range $10.47 - $14.59

Q1 2019

Shares 860,931 Value ($000) $14,154 Avg Close $11.53 Range $8.79 - $13.22

Q4 2018

Shares 896,493 Value ($000) $10,839 Avg Close $10.59 Range $7.89 - $14.30

Q3 2018

Shares 883,151 Value ($000) $16,683 Avg Close $11.96 Range $9.66 - $14.32

Q2 2018

Shares 949,407 Value ($000) $13,567 Avg Close $12.37 Range $10.03 - $15.03

Q1 2018

Shares 692,959 Value ($000) $11,475 Avg Close $14.02 Range $11.69 - $17.86

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2019	514,739	$7,206	$9.23	$7.85 - $11.39
Q3 2019	727,524	$9,763	$10.40	$9.58 - $11.75
Q2 2019	775,318	$11,614	$12.55	$10.47 - $14.59
Q1 2019	860,931	$14,154	$11.53	$8.79 - $13.22
Q4 2018	896,493	$10,839	$10.59	$7.89 - $14.30
Q3 2018	883,151	$16,683	$11.96	$9.66 - $14.32
Q2 2018	949,407	$13,567	$12.37	$10.03 - $15.03
Q1 2018	692,959	$11,475	$14.02	$11.69 - $17.86