ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

Rosenberg Matthew Hamilton's Holding History (CIK: 0001812103)

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

Q1 2024

Shares 7 Value ($000) $0 Avg Close $15.91 Range $13.95 - $19.19

Q4 2023

Shares 7 Value ($000) $0 Avg Close $18.57 Range $14.04 - $21.32

Q3 2023

Shares 7 Value ($000) $0 Avg Close $26.69 Range $20.50 - $30.76

Q2 2023

Shares 7 Value ($000) $0 Avg Close $24.94 Range $21.78 - $29.71

Q1 2023

Shares 7 Value ($000) $0 Avg Close $21.96 Range $19.68 - $24.18

Q4 2022

Shares 7 Value ($000) $0 Avg Close $21.88 Range $17.32 - $26.34

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2024	7	$0	$15.91	$13.95 - $19.19
Q4 2023	7	$0	$18.57	$14.04 - $21.32
Q3 2023	7	$0	$26.69	$20.50 - $30.76
Q2 2023	7	$0	$24.94	$21.78 - $29.71
Q1 2023	7	$0	$21.96	$19.68 - $24.18
Q4 2022	7	$0	$21.88	$17.32 - $26.34