Renaissance Technologies’s Energy Recovery ERII Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | – | Sell |
-144,265
| Closed | -$1.45M | – | 3310 |
|
|
2026
Q1 | $1.45M | Buy |
144,265
+41,280
| +40% | +$540K | ﹤0.01% | 2069 |
|
|
2025
Q4 | $1.39M | Buy |
102,985
+47,385
| +85% | +$718K | ﹤0.01% | 2087 |
|
|
2025
Q3 | $857K | Sell |
55,600
-85,500
| -61% | -$1.21M | ﹤0.01% | 2567 |
|
|
2025
Q2 | $1.8M | Sell |
141,100
-100,400
| -42% | -$1.36M | ﹤0.01% | 2175 |
|
|
2025
Q1 | $3.84M | Buy |
241,500
+51,100
| +27% | +$777K | 0.01% | 1584 |
|
|
2024
Q4 | $2.8M | Buy |
+190,400
| New | +$3.26M | ﹤0.01% | 1831 |
|
|
2024
Q2 | – | Sell |
-162,000
| Closed | -$2.56M | – | 3608 |
|
|
2024
Q1 | $2.56M | Buy |
162,000
+62,700
| +63% | +$998K | ﹤0.01% | 1864 |
|
|
2023
Q4 | $1.87M | Buy |
+99,300
| New | +$1.84M | ﹤0.01% | 1989 |
|
|
2022
Q4 | – | Sell |
-49,500
| Closed | -$1.08M | – | 4182 |
|
|
2022
Q3 | $1.08M | Sell |
49,500
-40,200
| -45% | -$905K | ﹤0.01% | 2449 |
|
|
2022
Q2 | $1.74M | Sell |
89,700
-49,300
| -35% | -$956K | ﹤0.01% | 2294 |
|
|
2022
Q1 | $2.8M | Buy |
+139,000
| New | +$2.71M | ﹤0.01% | 1980 |
|
|
2021
Q4 | – | Sell |
-25,100
| Closed | -$478K | – | 3979 |
|
|
2021
Q3 | $478K | Buy |
+25,100
| New | +$510K | ﹤0.01% | 2906 |
|
|
2021
Q2 | – | Sell |
-15,400
| Closed | -$282K | – | 3536 |
|
|
2021
Q1 | $282K | Buy |
+15,400
| New | +$247K | ﹤0.01% | 3074 |
|
|
2020
Q3 | – | Sell |
-33,700
| Closed | -$256K | – | 3447 |
|
|
2020
Q2 | $256K | Sell |
33,700
-34,400
| -51% | -$272K | ﹤0.01% | 3095 |
|
|
2020
Q1 | $507K | Sell |
68,100
-8,200
| -11% | -$77.7K | ﹤0.01% | 2752 |
|
|
2019
Q4 | $747K | Sell |
76,300
-22,900
| -23% | -$211K | ﹤0.01% | 2753 |
|
|
2019
Q3 | $919K | Buy |
+99,200
| New | +$1M | ﹤0.01% | 2638 |
|
|
2019
Q2 | – | Sell |
-40,800
| Closed | -$356K | – | 3600 |
|
|
2019
Q1 | $356K | Buy |
+40,800
| New | +$325K | ﹤0.01% | 3047 |
|
|
2017
Q4 | – | Sell |
-278,700
| Closed | -$2.2M | – | 3374 |
|
|
2017
Q3 | $2.2M | Sell |
278,700
-128,600
| -32% | -$919K | ﹤0.01% | 2253 |
|
|
2017
Q2 | $3.38M | Sell |
407,300
-34,600
| -8% | -$277K | ﹤0.01% | 1956 |
|
|
2017
Q1 | $3.68M | Buy |
441,900
+425,500
| +2,595% | +$3.95M | 0.01% | 1890 |
|
|
2016
Q4 | $170K | Sell |
16,400
-7,500
| -31% | -$90.1K | ﹤0.01% | 3032 |
|
|
2016
Q3 | $382K | Sell |
23,900
-244,200
| -91% | -$2.97M | ﹤0.01% | 2893 |
|
|
2016
Q2 | $2.38M | Buy |
268,100
+126,300
| +89% | +$1.35M | ﹤0.01% | 2098 |
|
|
2016
Q1 | $1.47M | Sell |
141,800
-13,900
| -9% | -$101K | ﹤0.01% | 2398 |
|
|
2015
Q4 | $1.1M | Buy |
+155,700
| New | +$982K | ﹤0.01% | 2423 |
|
|
2013
Q3 | – | Sell |
-141,100
| Closed | -$583K | – | 2841 |
|
|
2013
Q2 | $583K | Buy |
+141,100
| New | +$538K | ﹤0.01% | 2179 |
|
Other funds holding ERII
Renaissance Technologies's ERII Position: Q2 2026 in Review
Renaissance Technologies sold out of Energy Recovery (ERII) in Q2 2026, closing a stake of 144,265 shares — an estimated $1.45M sold.
Renaissance Technologies first reported a position in ERII in Q2 2013 and held it in 27 quarters. The position peaked at $3.84M in Q1 2025. 200 funds tracked by Wall St. Rank hold ERII as of Q2 2026.
- Renaissance Technologies reported no remaining Energy Recovery position as of Q2 2026 after selling out during the quarter.
- Renaissance Technologies sold 144,265 Energy Recovery shares in Q2 2026, an estimated $1.45M.
- Renaissance Technologies first reported a position in Energy Recovery in Q2 2013 and held it in 27 quarters.
- Renaissance Technologies's Energy Recovery position peaked at $3.84M in Q1 2025.
- 200 funds tracked by Wall St. Rank held Energy Recovery as of Q2 2026.
Based on Renaissance Technologies's 13F filing for Q2 2026, filed 13 Aug 2026.