ENERGY RECOVERY INC

Ticker: ERII CUSIP: 29270J100 Class: Common Stock

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

InstitutionSharesValue ($000)
BlackRock, Inc.6,337,391$85,491
AMERIPRISE FINANCIAL INC4,563,348$61,560
VANGUARD GROUP INC3,852,438$51,969
Amundi2,851,691$38,457
FIL Ltd1,993,506$26,892
STATE STREET CORP1,764,522$23,803
Legal & General Group Plc1,343,847$18,128
GEODE CAPITAL MANAGEMENT, LLC1,260,894$17,012
MORGAN STANLEY973,294$13,130
AVENIR CORP969,580$13,080
DIMENSIONAL FUND ADVISORS LP949,489$12,808
DIAMOND HILL CAPITAL MANAGEMENT INC888,358$11,984
Select Equity Group, L.P.773,577$10,436
BROWN CAPITAL MANAGEMENT LLC764,793$10,317
Invesco Ltd.746,036$10,064
ACK Asset Management LLC677,251$9,136
GOLDMAN SACHS GROUP INC607,176$8,191
CHARLES SCHWAB INVESTMENT MANAGEMENT INC444,590$5,998
NORTHERN TRUST CORP438,397$5,914
Swiss Life Asset Management Ltd434,131$5,856
JACOBS LEVY EQUITY MANAGEMENT, INC426,733$5,757
CITADEL ADVISORS LLC418,587$5,647
KLP KAPITALFORVALTNING AS387,711$5,230
Qube Research & Technologies Ltd385,687$5,203
PINNACLE ASSOCIATES LTD380,230$5,129
ArrowMark Colorado Holdings LLC377,000$5,086
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP348,187$4,697
Kopion Asset Management, LLC334,469$4,512
ROYCE & ASSOCIATES LP332,247$4,482
DUFF & PHELPS INVESTMENT MANAGEMENT CO301,487$4,067
WELLINGTON MANAGEMENT GROUP LLP300,618$4,055
Raiffeisen Bank International AG300,000$4,044
Alpha Wave Global, LP265,121$3,576
FMR LLC250,242$3,376
Redmond Asset Management, LLC226,335$3,053
Assenagon Asset Management S.A.220,116$2,969
MILLENNIUM MANAGEMENT LLC194,532$2,624
DEUTSCHE BANK AG\171,306$2,311
Nuveen, LLC164,658$2,221
SG Americas Securities, LLC162,116$2
UBS ASSET MANAGEMENT AMERICAS INC159,654$2,154
Bank of New York Mellon Corp154,768$2,088
ESSEX INVESTMENT MANAGEMENT CO LLC135,100$1,822
Conestoga Capital Advisors, LLC133,725$1,804
Montanaro Asset Management Ltd128,160$1,729
JUPITER ASSET MANAGEMENT LTD122,129$1,648
RICE HALL JAMES & ASSOCIATES, LLC121,998$1,646
Candriam S.C.A.119,714$1,615
BNP PARIBAS ARBITRAGE, SA116,077$1,566
Y-Intercept (Hong Kong) Ltd113,863$1,536
NORDEA INVESTMENT MANAGEMENT AB113,694$1,520
STATE OF WISCONSIN INVESTMENT BOARD113,666$1,533
JANE STREET GROUP, LLC111,673$1,506
ISTHMUS PARTNERS, LLC111,054$1,498
MARSHALL WACE, LLP109,390$1,476
GSA CAPITAL PARTNERS LLP109,307$1
Swiss National Bank105,000$1,416
RENAISSANCE TECHNOLOGIES LLC102,985$1,389
UBS Group AG101,810$1,373
RAYMOND JAMES FINANCIAL INC101,629$1,371
BARCLAYS PLC97,060$1,309
KBC Group NV84,488$1
Campbell & CO Investment Adviser LLC81,604$1,101
GABELLI FUNDS LLC74,000$998
RHUMBLINE ADVISERS72,123$973
WELLS FARGO & COMPANY/MN68,500$924
HSBC HOLDINGS PLC65,056$874
D. E. Shaw & Co., Inc.63,095$851
PRINCIPAL FINANCIAL GROUP INC63,038$850
CARY STREET PARTNERS FINANCIAL LLC54,749$739
ALLIANCEBERNSTEIN L.P.54,250$732
PRICE T ROWE ASSOCIATES INC /MD/53,701$1
BANK OF AMERICA CORP /DE/53,340$720
AMERICAN CENTURY COMPANIES INC51,288$692
Old West Investment Management, LLC49,944$674
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM49,008$661
Quantinno Capital Management LP46,642$629
SHELTON CAPITAL MANAGEMENT46,385$626
Universal- Beteiligungs- und Servicegesellschaft mbH45,687$616
LAZARD ASSET MANAGEMENT LLC43,591$588
Pathstone Holdings, LLC41,191$556
ACADIAN ASSET MANAGEMENT LLC40,787$1
MISSION WEALTH MANAGEMENT, LP40,787$550
Verition Fund Management LLC39,786$537
Voya Investment Management LLC39,767$536
TEACHER RETIREMENT SYSTEM OF TEXAS39,182$529
MERCER GLOBAL ADVISORS INC /ADV38,950$525
Engineers Gate Manager LP38,412$518
DnB Asset Management AS38,196$515
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.37,778$510
FRANKLIN RESOURCES INC37,317$503
HighTower Advisors, LLC37,142$501
Russell Investments Group, Ltd.36,225$489
Skandinaviska Enskilda Banken AB (publ)35,385$477
Inspire Investing, LLC35,339$477
Connor, Clark & Lunn Investment Management Ltd.34,405$464
AVIVA PLC33,974$458
BANK OF MONTREAL /CAN/33,585$453
INTECH INVESTMENT MANAGEMENT LLC31,722$428
Sargent Investment Group, LLC30,990$418
89 other institutions875,276$10,556
Total (189 institutions)43,800,832$583,520