ERII Institutional Ownership
Who owns Energy Recovery, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 200 funds reported holding ERII at Jun 30, 2026, together owning 86.0% of the company.
- ▲121 buying vs 83 selling
- ▼Held by funds -0.9 pts
- ▲Funds holding +2
- ●Superinvestors: 2 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 200 | 198 | +1.0% |
| In funds' top 10 | 1 | 0 | – |
| 13F shares | 43.9M | 44.3M | −1.0% |
| Held by funds | 86.0% | 86.8% | −0.9 pts |
| New positions | 40 | 37 | +8.1% |
| Increased | 81 | 66 | +22.7% |
| Reduced | 45 | 65 | −30.8% |
| Sold out | 38 | 35 | +8.6% |
| Calls (shares) | 113K | 60 | +187608.3% |
| Puts (shares) | 190K | 0 | – |
| Put/call ratio | 1.69 | 0.00 | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ERII
All superinvestors →
Who owns ERII
share of fund held shares- Index and passive funds41.6%
- Active managers and hedge funds45.7%
- Banks and brokers12.4%
- Pensions, insurers and other0.4%
The top 10 holders own 53.1% of all ERII shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
46 funds changed their position- Mackenzie Financial CorpTrimmed−899K sh
- CenterBook Partners LPSold out−421K sh
- Brown Capital Management LLCSold out−283K sh
- Kopion Asset Management, LLCAdded+379K sh
- Y-Intercept (Hong Kong) LtdSold out−120K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 12.43% | 6.3M | $57.2M | +253K |
| 2 | Amundi | 7.84% | 4M | $36.1M | +263K |
| 3 | Vanguard Capital Management LLC | 4.28% | 2.2M | $19.7M | −47K |
| 4 | Legal & General Group Plc | 4.04% | 2.1M | $18.6M | +157K |
| 5 | FIL Ltd | 3.36% | 1.7M | $15.5M | −272K |
| 6 | Geode Capital Management, LLC | 3.33% | 1.7M | $15.3M | +402K |
| 7 | State Street Corp | 3.19% | 1.6M | $14.7M | −147K |
| 8 | Vanguard Portfolio Management LLC | 2.48% | 1.3M | $11.4M | +2,006 |
| 9 | Morgan Stanley | 2.42% | 1.2M | $11.2M | +444K |
| 10 | Mackenzie Financial Corp | 2.33% | 1.2M | $10.7M | +1.2M |
- Mackenzie Financial Corp+1.2M sh+$10.7M
- Marshall Wace, LLP+571K sh+$5.1M
- Tudor Investment Corp ET AL+472K sh+$4.3M
- Morgan Stanley+444K sh+$4M
- Lazard Asset Management LLC+433K sh+$3.9M
- Zurcher Kantonalbank (Zurich Cantonalbank)+411K sh+$3.7M
- Geode Capital Management, LLC+402K sh+$3.6M
- ArrowMark Colorado Holdings LLC+331K sh+$3M
- Ameriprise Financial Inc−4.6M sh−$41.3M
- Diamond Hill Capital Management, LLC (Investment Advisor)−673K sh−$6.8M
- Arrowstreet Capital, Limited Partnership−514K sh−$5.2M
- Select Equity Group, L.P.−394K sh−$4M
- Millennium Management LLC−322K sh−$3.2M
- FIL Ltd−272K sh−$2.5M
- Brown Capital Management LLC−255K sh−$2.3M
- Redmond Asset Management, LLC−214K sh−$2.2M
ERII institutional ownership FAQ
Who owns the most ERII stock?
In Q2 2026 13F filings the largest holder of ERII was BlackRock, Inc., followed by Amundi and Vanguard Capital Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of ERII is owned by institutions?
Funds that file 13F reports held 86.0% of ERII's shares at Jun 30, 2026, compared with 86.8% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ERII?
In Q2 2026, 121 funds bought ERII (40 of them new positions) and 83 sold (38 sold out completely). Among well known investors, 2 added and 2 cut. Our fund sentiment for ERII is neutral.
What is ERII's institutional put/call ratio?
Funds reported $1.7M of ERII puts against $1M of calls, a put/call ratio of 1.69 (0.00 the quarter before). Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ERII ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.