ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

MARSHALL WACE, LLP's Holding History (CIK: 0001318757)

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

Q4 2025
Shares 109,390 Value ($000) $1,476 Avg Close $15.16 Range $13.27 - $18.32
Q3 2025
Shares 239,389 Value ($000) $3,691 Avg Close $14.10 Range $12.54 - $15.47
Q2 2025
Shares 50,214 Value ($000) $642 Avg Close $13.55 Range $10.86 - $16.05
Q1 2025
Shares 47,284 Value ($000) $751 Avg Close $15.21 Range $13.80 - $16.86
Q4 2024
Shares 177,630 Value ($000) $2,611 Avg Close $17.11 Range $14.47 - $20.27
Q1 2024
Shares 122,799 Value ($000) $1,939 Avg Close $15.91 Range $13.95 - $19.19
Q1 2023
Shares 121,934 Value ($000) $2,811 Avg Close $21.96 Range $19.68 - $24.18
Q4 2022
Shares 19,482 Value ($000) $399 Avg Close $21.88 Range $17.32 - $26.34
Q3 2022
Shares 46,800 Value ($000) $1,017 Avg Close $22.52 Range $18.74 - $26.20
Q2 2022
Shares 61,643 Value ($000) $1,198 Avg Close $19.40 Range $16.92 - $21.97
Q1 2022
Shares 21,055 Value ($000) $424 Avg Close $19.47 Range $17.84 - $22.09
Q3 2021
Shares 156,218 Value ($000) $2,973 Avg Close $20.30 Range $17.94 - $23.69
Q2 2021
Shares 103,679 Value ($000) $2,362 Avg Close $19.71 Range $16.40 - $22.81
Q1 2021
Shares 42,249 Value ($000) $775 Avg Close $16.01 Range $13.45 - $20.25
Q1 2019
Shares 35,227 Value ($000) $308 Avg Close $7.96 Range $6.56 - $9.18