Energy Recovery
ERII
197 hedge funds and large institutions have $446M invested in Energy Recovery in 2026 Q1 according to their latest regulatory filings, with 44 funds opening new positions, 66 increasing their positions, 64 reducing their positions, and 35 closing their positions.
219% more call options, than puts
Call options by funds: $890K | Put options by funds: $279K
26% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 35
3% more funds holding
Funds holding: 191 → 197 (+6)
1.23% more ownership
Funds ownership: 82.65% → 83.87% (+1.2%)
3% more repeat investments, than reductions
Existing positions increased: 66 | Existing positions reduced: 64
24% less capital invested
Capital invested by funds: $591M → $446M (-$144M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Amundi
Paris,
France
|
+$11.6M |
| 2 |
Ameriprise
Minneapolis,
Minnesota
|
+$9.11M |
| 3 |
Legal & General Group
London,
United Kingdom
|
+$7.31M |
| 4 |
6CM
683 Capital Management
New York
|
+$7.2M |
| 5 |
CP
CenterBook Partners
Greenwich,
Connecticut
|
+$3.56M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AAM
ACK Asset Management
Greenwich,
Connecticut
|
-$9.14M |
| 2 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
-$5.2M |
| 3 |
Select Equity Group
New York
|
-$4.96M |
| 4 |
DPIM
Duff & Phelps Investment Management
Chicago,
Illinois
|
-$4.07M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
-$4.06M |
ERII Hedge Fund Activity: Q1 2026 in Review
197 of the 8,184 institutional investors tracked by Wall St. Rank reported a position in Energy Recovery (ERII) for Q1 2026, worth a combined $446M — down 24% from $591M a quarter earlier.
Buyers outnumbered sellers: 44 funds opened new ERII positions and 35 closed out — a net gain of 9 holders — while 66 added to existing stakes and 64 trimmed.
The largest buyer was Amundi, adding an estimated $11.6M. The largest seller was ACK Asset Management, exiting entirely with an estimated $9.14M sold.
- 197 institutional investors held Energy Recovery (ERII) as of Q1 2026, up from 191 in Q4 2025.
- Funds reported $446M of Energy Recovery stock for Q1 2026, down 24% quarter-over-quarter.
- 44 funds opened new Energy Recovery positions in Q1 2026 and 35 closed out, a net change of +9 holders.
- The largest Energy Recovery buyer in Q1 2026 was Amundi, an estimated $11.6M added.
- The largest Energy Recovery seller in Q1 2026 was ACK Asset Management, an estimated $9.14M sold.
Based on aggregated 13F filings for Q1 2026.