ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2025

Shares 438,397 Value ($000) $5,914 Avg Close $15.16 Range $13.27 - $18.32

Q3 2025

Shares 487,736 Value ($000) $7,521 Avg Close $14.10 Range $12.54 - $15.47

Q2 2025

Shares 496,660 Value ($000) $6,347 Avg Close $13.55 Range $10.86 - $16.05

Q1 2025

Shares 541,561 Value ($000) $8,605 Avg Close $15.21 Range $13.80 - $16.86

Q4 2024

Shares 559,587 Value ($000) $8,226 Avg Close $17.11 Range $14.47 - $20.27

Q3 2024

Shares 535,288 Value ($000) $9,309 Avg Close $15.78 Range $12.46 - $18.36

Q2 2024

Shares 528,876 Value ($000) $7,029 Avg Close $13.78 Range $12.26 - $15.95

Q1 2024

Shares 545,327 Value ($000) $8,611 Avg Close $15.91 Range $13.95 - $19.19

Q4 2023

Shares 569,923 Value ($000) $10,737 Avg Close $18.57 Range $14.04 - $21.32

Q3 2023

Shares 567,750 Value ($000) $12,042 Avg Close $26.69 Range $20.50 - $30.76

Q2 2023

Shares 558,813 Value ($000) $15,619 Avg Close $24.94 Range $21.78 - $29.71

Q1 2023

Shares 544,101 Value ($000) $12,542 Avg Close $21.96 Range $19.68 - $24.18

Q4 2022

Shares 538,370 Value ($000) $11,031 Avg Close $21.88 Range $17.32 - $26.34

Q3 2022

Shares 536,028 Value ($000) $11,653 Avg Close $22.52 Range $18.74 - $26.20

Q2 2022

Shares 517,714 Value ($000) $10,054 Avg Close $19.40 Range $16.92 - $21.97

Q1 2022

Shares 413,935 Value ($000) $8,337 Avg Close $19.47 Range $17.84 - $22.09

Q4 2021

Shares 433,920 Value ($000) $9,324 Avg Close $20.92 Range $18.50 - $24.99

Q3 2021

Shares 444,730 Value ($000) $8,463 Avg Close $20.30 Range $17.94 - $23.69

Q2 2021

Shares 462,230 Value ($000) $10,530 Avg Close $19.71 Range $16.40 - $22.81

Q1 2021

Shares 456,791 Value ($000) $8,378 Avg Close $16.01 Range $13.45 - $20.25

Q4 2020

Shares 480,523 Value ($000) $6,554 Avg Close $10.67 Range $8.12 - $13.98

Q3 2020

Shares 491,673 Value ($000) $4,032 Avg Close $8.02 Range $6.69 - $9.18

Q2 2020

Shares 493,352 Value ($000) $3,746 Avg Close $7.92 Range $6.66 - $9.31

Q1 2020

Shares 477,062 Value ($000) $3,550 Avg Close $9.48 Range $6.11 - $11.07

Q4 2019

Shares 467,427 Value ($000) $4,577 Avg Close $9.21 Range $8.32 - $10.24

Q3 2019

Shares 522,368 Value ($000) $4,839 Avg Close $10.08 Range $8.61 - $12.04

Q2 2019

Shares 454,372 Value ($000) $4,735 Avg Close $9.84 Range $8.69 - $11.11

Q1 2019

Shares 452,215 Value ($000) $3,947 Avg Close $7.96 Range $6.56 - $9.18

Q4 2018

Shares 456,306 Value ($000) $3,070 Avg Close $7.87 Range $6.17 - $9.28

Q3 2018

Shares 453,265 Value ($000) $4,057 Avg Close $8.85 Range $7.68 - $10.25

Q2 2018

Shares 441,024 Value ($000) $3,564 Avg Close $8.43 Range $7.56 - $9.36

Q1 2018

Shares 437,808 Value ($000) $3,599 Avg Close $8.08 Range $6.17 - $9.21

Q4 2017

Shares 441,072 Value ($000) $3,860 Avg Close $9.12 Range $7.48 - $11.30

Q3 2017

Shares 445,214 Value ($000) $3,517 Avg Close $7.14 Range $6.13 - $8.43

Q2 2017

Shares 449,189 Value ($000) $3,724 Avg Close $8.01 Range $7.11 - $8.77

Q1 2017

Shares 404,895 Value ($000) $3,369 Avg Close $9.28 Range $7.11 - $11.46

Q4 2016

Shares 397,365 Value ($000) $4,113 Avg Close $12.01 Range $8.53 - $16.30

Q3 2016

Shares 386,343 Value ($000) $6,174 Avg Close $12.16 Range $8.35 - $16.67

Q2 2016

Shares 393,072 Value ($000) $3,494 Avg Close $10.67 Range $7.77 - $13.35

Q1 2016

Shares 67,095 Value ($000) $694 Avg Close $7.29 Range $5.28 - $10.82

Q4 2015

Shares 63,029 Value ($000) $445 Avg Close $6.31 Range $2.09 - $9.50

Q3 2015

Shares 70,642 Value ($000) $151 Avg Close $2.59 Range $2.07 - $3.07

Q2 2015

Shares 408,014 Value ($000) $1,119 Avg Close $2.93 Range $2.28 - $3.71

Q1 2015

Shares 450,804 Value ($000) $1,168 Avg Close $3.44 Range $2.49 - $5.37

Q4 2014

Shares 447,923 Value ($000) $2,361 Avg Close $4.54 Range $3.30 - $5.42

Q3 2014

Shares 452,446 Value ($000) $1,602 Avg Close $4.37 Range $3.54 - $5.15

Q2 2014

Shares 506,722 Value ($000) $2,493 Avg Close $5.16 Range $4.10 - $6.18

Q1 2014

Shares 525,967 Value ($000) $2,798 Avg Close $4.92 Range $3.82 - $6.98

Q4 2013

Shares 599,417 Value ($000) $3,328 Avg Close $5.62 Range $4.56 - $7.55

Q3 2013

Shares 585,168 Value ($000) $4,236 Avg Close $5.20 Range $3.99 - $7.75

Q2 2013

Shares 594,209 Value ($000) $2,454 Avg Close $3.81 Range $3.24 - $4.50

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	438,397	$5,914	$15.16	$13.27 - $18.32
Q3 2025	487,736	$7,521	$14.10	$12.54 - $15.47
Q2 2025	496,660	$6,347	$13.55	$10.86 - $16.05
Q1 2025	541,561	$8,605	$15.21	$13.80 - $16.86
Q4 2024	559,587	$8,226	$17.11	$14.47 - $20.27
Q3 2024	535,288	$9,309	$15.78	$12.46 - $18.36
Q2 2024	528,876	$7,029	$13.78	$12.26 - $15.95
Q1 2024	545,327	$8,611	$15.91	$13.95 - $19.19
Q4 2023	569,923	$10,737	$18.57	$14.04 - $21.32
Q3 2023	567,750	$12,042	$26.69	$20.50 - $30.76
Q2 2023	558,813	$15,619	$24.94	$21.78 - $29.71
Q1 2023	544,101	$12,542	$21.96	$19.68 - $24.18
Q4 2022	538,370	$11,031	$21.88	$17.32 - $26.34
Q3 2022	536,028	$11,653	$22.52	$18.74 - $26.20
Q2 2022	517,714	$10,054	$19.40	$16.92 - $21.97
Q1 2022	413,935	$8,337	$19.47	$17.84 - $22.09
Q4 2021	433,920	$9,324	$20.92	$18.50 - $24.99
Q3 2021	444,730	$8,463	$20.30	$17.94 - $23.69
Q2 2021	462,230	$10,530	$19.71	$16.40 - $22.81
Q1 2021	456,791	$8,378	$16.01	$13.45 - $20.25
Q4 2020	480,523	$6,554	$10.67	$8.12 - $13.98
Q3 2020	491,673	$4,032	$8.02	$6.69 - $9.18
Q2 2020	493,352	$3,746	$7.92	$6.66 - $9.31
Q1 2020	477,062	$3,550	$9.48	$6.11 - $11.07
Q4 2019	467,427	$4,577	$9.21	$8.32 - $10.24
Q3 2019	522,368	$4,839	$10.08	$8.61 - $12.04
Q2 2019	454,372	$4,735	$9.84	$8.69 - $11.11
Q1 2019	452,215	$3,947	$7.96	$6.56 - $9.18
Q4 2018	456,306	$3,070	$7.87	$6.17 - $9.28
Q3 2018	453,265	$4,057	$8.85	$7.68 - $10.25
Q2 2018	441,024	$3,564	$8.43	$7.56 - $9.36
Q1 2018	437,808	$3,599	$8.08	$6.17 - $9.21
Q4 2017	441,072	$3,860	$9.12	$7.48 - $11.30
Q3 2017	445,214	$3,517	$7.14	$6.13 - $8.43
Q2 2017	449,189	$3,724	$8.01	$7.11 - $8.77
Q1 2017	404,895	$3,369	$9.28	$7.11 - $11.46
Q4 2016	397,365	$4,113	$12.01	$8.53 - $16.30
Q3 2016	386,343	$6,174	$12.16	$8.35 - $16.67
Q2 2016	393,072	$3,494	$10.67	$7.77 - $13.35
Q1 2016	67,095	$694	$7.29	$5.28 - $10.82
Q4 2015	63,029	$445	$6.31	$2.09 - $9.50
Q3 2015	70,642	$151	$2.59	$2.07 - $3.07
Q2 2015	408,014	$1,119	$2.93	$2.28 - $3.71
Q1 2015	450,804	$1,168	$3.44	$2.49 - $5.37
Q4 2014	447,923	$2,361	$4.54	$3.30 - $5.42
Q3 2014	452,446	$1,602	$4.37	$3.54 - $5.15
Q2 2014	506,722	$2,493	$5.16	$4.10 - $6.18
Q1 2014	525,967	$2,798	$4.92	$3.82 - $6.98
Q4 2013	599,417	$3,328	$5.62	$4.56 - $7.55
Q3 2013	585,168	$4,236	$5.20	$3.99 - $7.75
Q2 2013	594,209	$2,454	$3.81	$3.24 - $4.50