ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

Caprock Group, LLC's Holding History (CIK: 0001610769)

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

Q4 2018

Shares 17,866 Value ($000) $120 Avg Close $7.87 Range $6.17 - $9.28

Q3 2018

Shares 23,350 Value ($000) $209 Avg Close $8.85 Range $7.68 - $10.25

Q2 2018

Shares 25,283 Value ($000) $204 Avg Close $8.43 Range $7.56 - $9.36

Q1 2018

Shares 19,304 Value ($000) $159 Avg Close $8.08 Range $6.17 - $9.21

Q4 2017

Shares 21,198 Value ($000) $190 Avg Close $9.12 Range $7.48 - $11.30

Q3 2017

Shares 21,564 Value ($000) $170 Avg Close $7.14 Range $6.13 - $8.43

Q2 2017

Shares 24,345 Value ($000) $202 Avg Close $8.01 Range $7.11 - $8.77

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	17,866	$120	$7.87	$6.17 - $9.28
Q3 2018	23,350	$209	$8.85	$7.68 - $10.25
Q2 2018	25,283	$204	$8.43	$7.56 - $9.36
Q1 2018	19,304	$159	$8.08	$6.17 - $9.21
Q4 2017	21,198	$190	$9.12	$7.48 - $11.30
Q3 2017	21,564	$170	$7.14	$6.13 - $8.43
Q2 2017	24,345	$202	$8.01	$7.11 - $8.77