ERII Institutional Ownership & Shareholders
ENERGY RECOVERY INC (ERII) is currently held by 198 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $340.31M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ERII tracked by InsiderSet, reporting ownership valued at approximately $57.23M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $44.16M, representing an estimated loss of -22.84% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 53% of the total disclosed ERII value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Legal & General Group Plc, and several other long-term asset managers with concentrated positions in ENERGY RECOVERY INC (ERII).
This page ranks the largest institutional ERII shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
198
Total Reported Value
$340.31M
Largest Holder
Blackrock, Inc.
Largest Position
$57.23M
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
75
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 6,344,252 | $57,225,153 | $44,155,994 | -$13,069,159 | -22.84% | |
| Vanguard Capital Management Llc | 0.00% | 2,183,718 | $19,697,136 | $15,198,677 | -$4,498,459 | -22.84% | |
| Legal & General Group Plc | 0.00% | 2,059,764 | $18,579,072 | $14,335,957 | -$4,243,115 | -22.84% | |
| Fil Ltd | 0.01% | 1,715,722 | $15,475,812 | $11,941,425 | -$3,534,387 | -22.84% | |
| Geode Capital Management, Llc | 0.00% | 1,697,550 | $15,314,318 | $11,814,948 | -$3,499,370 | -22.85% | |
| State Street Corp | 0.00% | 1,625,893 | $14,665,555 | $11,316,215 | -$3,349,340 | -22.84% | |
| Vanguard Portfolio Management Llc | 0.00% | 1,263,667 | $11,398,276 | $8,795,122 | -$2,603,154 | -22.84% | |
| Morgan Stanley | 0.00% | 1,237,003 | $11,157,767 | $8,609,541 | -$2,548,226 | -22.84% | |
| Invesco Ltd. | 0.00% | 925,550 | $8,348,460 | $6,441,828 | -$1,906,632 | -22.84% | |
| Dimensional Fund Advisors Lp | 0.00% | 878,724 | $7,925,406 | $6,115,919 | -$1,809,487 | -22.83% | |
| Arrowmark Colorado Holdings Llc | 0.32% | 847,000 | $7,639,940 | $5,895,120 | -$1,744,820 | -22.84% | |
| Kopion Asset Management, Llc | 4.34% | 1,018,133 | $6,790,947 | $7,086,206 | +$295,259 | +4.35% | |
| Royce & Associates Lp | 0.05% | 752,812 | $6,790,364 | $5,239,572 | -$1,550,792 | -22.84% | |
| Avenir Corp | 0.76% | 693,886 | $6,258,856 | $4,829,447 | -$1,429,409 | -22.84% | |
| Ameriprise Financial Inc | 0.00% | 679,236 | $6,126,710 | $4,727,483 | -$1,399,227 | -22.84% | |
| Marshall Wace, Llp | 0.01% | 677,248 | $6,108,776 | $4,713,646 | -$1,395,130 | -22.84% | |
| Goldman Sachs Group Inc | 0.00% | 601,335 | $5,424,042 | $4,185,292 | -$1,238,750 | -22.84% | |
| 683 Capital Management, Llc | 0.44% | 530,000 | $4,780,600 | $3,688,800 | -$1,091,800 | -22.84% | |
| Lazard Asset Management Llc | 0.01% | 500,061 | $4,510,550 | $3,480,425 | -$1,030,125 | -22.84% | |
| Northern Trust Corp | 0.00% | 478,524 | $4,316,286 | $3,330,527 | -$985,759 | -22.84% | |
| Citadel Advisors Llc | 0.00% | 476,236 | $4,295,649 | $3,314,603 | -$981,046 | -22.84% | |
| Tudor Investment Corp Et Al | 0.02% | 471,905 | $4,256,583 | $3,284,459 | -$972,124 | -22.84% | |
| Swiss Life Asset Management Ltd | 0.02% | 464,661 | $4,191,242 | $3,234,041 | -$957,201 | -22.84% | |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0.01% | 439,817 | $3,967,149 | $3,061,126 | -$906,023 | -22.84% | |
| Klp Kapitalforvaltning As | 0.01% | 400,311 | $3,610,805 | $2,786,165 | -$824,640 | -22.84% | |
| Bnp Paribas Financial Markets | 0.00% | 396,421 | $3,575,717 | $2,759,090 | -$816,627 | -22.84% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 378,799 | $3,416,767 | $2,636,441 | -$780,326 | -22.84% | |
| Vanguard Fiduciary Trust Co | 0.00% | 367,399 | $3,313,939 | $2,557,097 | -$756,842 | -22.84% | |
| Charles Schwab Investment Management Inc | 0.00% | 367,118 | $3,311,404 | $2,555,141 | -$756,263 | -22.84% | |
| Raiffeisen Bank International Ag | 0.03% | 430,000 | $2,902,500 | $2,992,800 | +$90,300 | +3.11% | |
| Jpmorgan Chase & Co | 0.00% | 285,216 | $2,512,754 | $1,985,103 | -$527,651 | -21.00% | |
| Aqr Capital Management Llc | 0.00% | 262,844 | $2,370,852 | $1,829,394 | -$541,458 | -22.84% | |
| Two Sigma Investments, Lp | 0.00% | 232,829 | $2,100,118 | $1,620,490 | -$479,628 | -22.84% | |
| D. E. Shaw & Co., Inc. | 0.00% | 218,707 | $1,972,737 | $1,522,201 | -$450,536 | -22.84% | |
| Mackenzie Financial Corp | 0.00% | 289,074 | $1,928,124 | $2,011,955 | +$83,831 | +4.35% | |
| Susquehanna International Group, Llp | 0.00% | 193,919 | $1,749,149 | $1,349,676 | -$399,473 | -22.84% | |
| Pinnacle Associates Ltd | 0.02% | 251,840 | $1,679,773 | $1,752,806 | +$73,033 | +4.35% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 165,708 | $1,668,680 | $1,153,328 | -$515,352 | -30.88% | |
| Nuveen, Llc | 0.00% | 173,713 | $1,566,891 | $1,209,042 | -$357,849 | -22.84% | |
| Jupiter Asset Management Ltd | 0.01% | 165,401 | $1,491,917 | $1,151,191 | -$340,726 | -22.84% | |
| Bank Of New York Mellon Corp | 0.00% | 155,092 | $1,398,930 | $1,079,440 | -$319,490 | -22.84% | |
| Principal Financial Group Inc | 0.00% | 209,103 | $1,394,717 | $1,455,357 | +$60,640 | +4.35% | |
| Jump Financial, Llc | 0.01% | 152,127 | $1,372,185 | $1,058,804 | -$313,381 | -22.84% | |
| Polymer Capital Management (Us) Llc | 0.19% | 144,705 | $1,305,239 | $1,007,147 | -$298,092 | -22.84% | |
| Sg Americas Securities, Llc | 0.00% | 142,285 | $1,283,000 | $990,304 | -$292,696 | -22.81% | |
| Squarepoint Ops Llc | 0.00% | 125,140 | $1,128,763 | $870,974 | -$257,789 | -22.84% | |
| Rice Hall James & Associates, Llc | 0.05% | 124,629 | $1,124,154 | $867,418 | -$256,736 | -22.84% | |
| Isthmus Partners, Llc | 0.11% | 166,689 | $1,111,816 | $1,160,155 | +$48,339 | +4.35% | |
| Nordea Investment Management Ab | 0.00% | 124,691 | $1,094,787 | $867,849 | -$226,938 | -20.73% | |
| Gsa Capital Partners Llp | 0.07% | 119,526 | $1,078,000 | $831,901 | -$246,099 | -22.83% |
Frequently asked questions about ERII
Who are the largest institutional holders of ERII?
The largest institutional holders of ERII reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Legal & General Group Plc, Fil Ltd, and Geode Capital Management, Llc. InsiderSet ranks institutional holders by their latest reported ERII position.
What is ERII institutional ownership?
This page tracks ERII positions reported by institutional investment managers through SEC Form 13F. ENERGY RECOVERY INC (ERII) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ERII?
InsiderSet currently tracks 198 institutional managers reporting ERII holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ERII shareholders.
How much ERII stock do institutions own?
Institutional investment managers disclosed approximately $340.31M in ERII holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ERII institutional ownership last updated?
The latest ERII institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ERII holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ERII position after the reporting date.
Are institutions buying or selling ERII?
Institutional buying and selling can be analyzed by comparing ERII positions across consecutive 13F reporting periods. InsiderSet's ERII Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ERII ownership changes.
How has ERII institutional ownership changed over time?
InsiderSet tracks ERII institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.