ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q4 2025

Shares 300,618 Value ($000) $4,055 Avg Close $15.16 Range $13.27 - $18.32

Q3 2025

Shares 302,525 Value ($000) $4,665 Avg Close $14.10 Range $12.54 - $15.47

Q4 2024

Shares 146,024 Value ($000) $2,147 Avg Close $17.11 Range $14.47 - $20.27

Q3 2024

Shares 276,911 Value ($000) $4,815 Avg Close $15.78 Range $12.46 - $18.36

Q2 2024

Shares 320,528 Value ($000) $4,260 Avg Close $13.78 Range $12.26 - $15.95

Q1 2024

Shares 273,024 Value ($000) $4,311 Avg Close $15.91 Range $13.95 - $19.19

Q4 2023

Shares 155,878 Value ($000) $2,937 Avg Close $18.57 Range $14.04 - $21.32

Q3 2023

Shares 150,694 Value ($000) $3,196 Avg Close $26.69 Range $20.50 - $30.76

Q2 2023

Shares 151,046 Value ($000) $4,222 Avg Close $24.94 Range $21.78 - $29.71

Q1 2023

Shares 103,078 Value ($000) $2,376 Avg Close $21.96 Range $19.68 - $24.18

Q4 2022

Shares 103,262 Value ($000) $2,116 Avg Close $21.88 Range $17.32 - $26.34

Q3 2022

Shares 108,154 Value ($000) $2,351 Avg Close $22.52 Range $18.74 - $26.20

Q2 2022

Shares 105,765 Value ($000) $2,054 Avg Close $19.40 Range $16.92 - $21.97

Q1 2022

Shares 120,097 Value ($000) $2,419 Avg Close $19.47 Range $17.84 - $22.09

Q4 2021

Shares 110,451 Value ($000) $2,374 Avg Close $20.92 Range $18.50 - $24.99

Q3 2021

Shares 113,134 Value ($000) $2,152 Avg Close $20.30 Range $17.94 - $23.69

Q2 2021

Shares 111,773 Value ($000) $2,546 Avg Close $19.71 Range $16.40 - $22.81

Q1 2021

Shares 96,865 Value ($000) $1,777 Avg Close $16.01 Range $13.45 - $20.25

Q4 2020

Shares 158,702 Value ($000) $2,165 Avg Close $10.67 Range $8.12 - $13.98

Q3 2020

Shares 142,818 Value ($000) $1,171 Avg Close $8.02 Range $6.69 - $9.18

Q2 2020

Shares 144,690 Value ($000) $1,099 Avg Close $7.92 Range $6.66 - $9.31

Q1 2017

Shares 97,409 Value ($000) $811 Avg Close $9.28 Range $7.11 - $11.46

Q4 2016

Shares 164,131 Value ($000) $1,699 Avg Close $12.01 Range $8.53 - $16.30

Q3 2016

Shares 74,531 Value ($000) $1,191 Avg Close $12.16 Range $8.35 - $16.67

Q2 2016

Shares 55,964 Value ($000) $497 Avg Close $10.67 Range $7.77 - $13.35

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	300,618	$4,055	$15.16	$13.27 - $18.32
Q3 2025	302,525	$4,665	$14.10	$12.54 - $15.47
Q4 2024	146,024	$2,147	$17.11	$14.47 - $20.27
Q3 2024	276,911	$4,815	$15.78	$12.46 - $18.36
Q2 2024	320,528	$4,260	$13.78	$12.26 - $15.95
Q1 2024	273,024	$4,311	$15.91	$13.95 - $19.19
Q4 2023	155,878	$2,937	$18.57	$14.04 - $21.32
Q3 2023	150,694	$3,196	$26.69	$20.50 - $30.76
Q2 2023	151,046	$4,222	$24.94	$21.78 - $29.71
Q1 2023	103,078	$2,376	$21.96	$19.68 - $24.18
Q4 2022	103,262	$2,116	$21.88	$17.32 - $26.34
Q3 2022	108,154	$2,351	$22.52	$18.74 - $26.20
Q2 2022	105,765	$2,054	$19.40	$16.92 - $21.97
Q1 2022	120,097	$2,419	$19.47	$17.84 - $22.09
Q4 2021	110,451	$2,374	$20.92	$18.50 - $24.99
Q3 2021	113,134	$2,152	$20.30	$17.94 - $23.69
Q2 2021	111,773	$2,546	$19.71	$16.40 - $22.81
Q1 2021	96,865	$1,777	$16.01	$13.45 - $20.25
Q4 2020	158,702	$2,165	$10.67	$8.12 - $13.98
Q3 2020	142,818	$1,171	$8.02	$6.69 - $9.18
Q2 2020	144,690	$1,099	$7.92	$6.66 - $9.31
Q1 2017	97,409	$811	$9.28	$7.11 - $11.46
Q4 2016	164,131	$1,699	$12.01	$8.53 - $16.30
Q3 2016	74,531	$1,191	$12.16	$8.35 - $16.67
Q2 2016	55,964	$497	$10.67	$7.77 - $13.35