ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q1 2025
Shares 1,417 Value ($000) $23 Avg Close $15.21 Range $13.80 - $16.86
Q4 2024
Shares 1,290 Value ($000) $19 Avg Close $17.11 Range $14.47 - $20.27
Q3 2022
Shares 5,376 Value ($000) $117 Avg Close $22.52 Range $18.74 - $26.20
Q1 2021
Shares 39,918 Value ($000) $732 Avg Close $16.01 Range $13.45 - $20.25
Q2 2020
Shares 3,704 Value ($000) $28 Avg Close $7.92 Range $6.66 - $9.31
Q1 2020
Shares 11,634 Value ($000) $87 Avg Close $9.48 Range $6.11 - $11.07
Q3 2019
Shares 201 Value ($000) $2 Avg Close $10.08 Range $8.61 - $12.04
Q2 2019
Shares 501 Value ($000) $5 Avg Close $9.84 Range $8.69 - $11.11
Q4 2018
Shares 1,582 Value ($000) $11 Avg Close $7.87 Range $6.17 - $9.28
Q2 2018
Shares 648 Value ($000) $5 Avg Close $8.43 Range $7.56 - $9.36
Q1 2018
Shares 67,569 Value ($000) $555 Avg Close $8.08 Range $6.17 - $9.21
Q4 2017
Shares 127,137 Value ($000) $1,112 Avg Close $9.12 Range $7.48 - $11.30
Q3 2017
Shares 29,222 Value ($000) $231 Avg Close $7.14 Range $6.13 - $8.43
Q2 2017
Shares 9,198 Value ($000) $76 Avg Close $8.01 Range $7.11 - $8.77
Q3 2016
Shares 22,827 Value ($000) $365 Avg Close $12.16 Range $8.35 - $16.67
Q2 2016
Shares 24,091 Value ($000) $214 Avg Close $10.67 Range $7.77 - $13.35
Q2 2015
Shares 6,346 Value ($000) $17 Avg Close $2.93 Range $2.28 - $3.71
Q1 2015
Shares 16,574 Value ($000) $43 Avg Close $3.44 Range $2.49 - $5.37
Q3 2014
Shares 832 Value ($000) $3 Avg Close $4.37 Range $3.54 - $5.15
Q2 2014
Shares 7,432 Value ($000) $37 Avg Close $5.16 Range $4.10 - $6.18
Q4 2013
Shares 2,181 Value ($000) $12 Avg Close $5.62 Range $4.56 - $7.55
Q2 2013
Shares 1,696 Value ($000) $7 Avg Close $3.81 Range $3.24 - $4.50