Israel Englander’s Arrowhead Research ARWR Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $26.8M | Buy |
+329,337
| New | +$24.3M | 0.01% | 1357 |
|
|
2026
Q1 | – | Sell |
-45,018
| Closed | -$2.99M | – | 5688 |
|
|
2025
Q4 | $2.99M | Sell |
45,018
-64,789
| -59% | -$3.18M | ﹤0.01% | 3567 |
|
|
2025
Q3 | $3.79M | Sell |
109,807
-59,234
| -35% | -$1.3M | ﹤0.01% | 3422 |
|
|
2025
Q2 | $2.67M | Sell |
169,041
-521,755
| -76% | -$7.49M | ﹤0.01% | 3616 |
|
|
2025
Q1 | $8.8M | Sell |
690,796
-223,754
| -24% | -$4.07M | ﹤0.01% | 2318 |
|
|
2024
Q4 | $17.2M | Buy |
914,550
+268,946
| +42% | +$5.54M | 0.01% | 1648 |
|
|
2024
Q3 | $12.5M | Buy |
645,604
+116,353
| +22% | +$2.84M | 0.01% | 1995 |
|
|
2024
Q2 | $13.8M | Buy |
529,251
+202,280
| +62% | +$4.97M | 0.01% | 1813 |
|
|
2024
Q1 | $9.35M | Buy |
+326,971
| New | +$10.5M | ﹤0.01% | 2252 |
|
|
2023
Q4 | – | Sell |
-308,613
| Closed | -$8.29M | – | 6063 |
|
|
2023
Q3 | $8.29M | Sell |
308,613
-19,780
| -6% | -$606K | ﹤0.01% | 2224 |
|
|
2023
Q2 | $11.7M | Sell |
328,393
-641,001
| -66% | -$22.1M | 0.01% | 1856 |
|
|
2023
Q1 | $24.6M | Buy |
969,394
+393,770
| +68% | +$12.4M | 0.01% | 1195 |
|
|
2022
Q4 | $23.3M | Buy |
575,624
+496,910
| +631% | +$16.5M | 0.01% | 1322 |
|
|
2022
Q3 | $2.6M | Sell |
78,714
-58,464
| -43% | -$2.36M | ﹤0.01% | 3509 |
|
|
2022
Q2 | $4.83M | Sell |
137,178
-2,302
| -2% | -$86.6K | ﹤0.01% | 2847 |
|
|
2022
Q1 | $6.42M | Buy |
139,480
+108,824
| +355% | +$5.39M | ﹤0.01% | 2659 |
|
|
2021
Q4 | $2.03M | Sell |
30,656
-17,363
| -36% | -$1.19M | ﹤0.01% | 3769 |
|
|
2021
Q3 | $3M | Buy |
48,019
+23,988
| +100% | +$1.55M | ﹤0.01% | 3441 |
|
|
2021
Q2 | $1.99M | Sell |
24,031
-6,088
| -20% | -$453K | ﹤0.01% | 3974 |
|
|
2021
Q1 | $2M | Sell |
30,119
-1,910
| -6% | -$148K | ﹤0.01% | 3534 |
|
|
2020
Q4 | $2.46M | Sell |
32,029
-156,215
| -83% | -$9.99M | ﹤0.01% | 3076 |
|
|
2020
Q3 | $8.11K | Buy |
+188,244
| New | +$8.12M | 0.01% | 1429 |
|
|
2020
Q1 | – | Sell |
-75,857
| Closed | -$4.81M | – | 3820 |
|
|
2019
Q4 | $4.81M | Buy |
75,857
+68,001
| +866% | +$3.37M | 0.01% | 1973 |
|
|
2019
Q3 | $221K | Sell |
7,856
-405,433
| -98% | -$12M | ﹤0.01% | 3738 |
|
|
2019
Q2 | $11M | Sell |
413,289
-530,546
| -56% | -$11.6M | 0.02% | 1178 |
|
|
2019
Q1 | $17.3M | Buy |
943,835
+836,894
| +783% | +$13.8M | 0.03% | 894 |
|
|
2018
Q4 | $1.33M | Sell |
106,941
-165,120
| -61% | -$2.26M | ﹤0.01% | 2444 |
|
|
2018
Q3 | $5.21M | Buy |
+272,061
| New | +$4.46M | 0.01% | 1764 |
|
|
2018
Q2 | – | Sell |
-817,317
| Closed | -$5.89M | – | 3775 |
|
|
2018
Q1 | $5.89M | Sell |
817,317
-199,110
| -20% | -$1.23M | 0.01% | 1700 |
|
|
2017
Q4 | $3.74M | Sell |
1,016,427
-255,711
| -20% | -$950K | 0.01% | 1900 |
|
|
2017
Q3 | $5.51M | Sell |
1,272,138
-204,901
| -14% | -$488K | 0.01% | 1619 |
|
|
2017
Q2 | $2.39M | Buy |
1,477,039
+992,709
| +205% | +$1.61M | ﹤0.01% | 1975 |
|
|
2017
Q1 | $896K | Sell |
484,330
-692,963
| -59% | -$1.37M | ﹤0.01% | 2461 |
|
|
2016
Q4 | $1.82M | Buy |
1,177,293
+1,143,673
| +3,402% | +$4.87M | ﹤0.01% | 1925 |
|
|
2016
Q3 | $247K | Buy |
33,620
+4,109
| +14% | +$26.6K | ﹤0.01% | 2896 |
|
|
2016
Q2 | $157K | Buy |
+29,511
| New | +$168K | ﹤0.01% | 2955 |
|
|
2016
Q1 | – | Sell |
-61,485
| Closed | -$378K | – | 3246 |
|
|
2015
Q4 | $378K | Sell |
61,485
-572,578
| -90% | -$3.25M | ﹤0.01% | 2792 |
|
|
2015
Q3 | $3.65M | Sell |
634,063
-1,501,968
| -70% | -$9.44M | 0.01% | 1512 |
|
|
2015
Q2 | $15.3M | Sell |
2,136,031
-69,326
| -3% | -$476K | 0.03% | 751 |
|
|
2015
Q1 | $14.9M | Buy |
2,205,357
+1,337,982
| +154% | +$9.49M | 0.03% | 827 |
|
|
2014
Q4 | $6.4M | Buy |
+867,375
| New | +$5.9M | 0.01% | 1228 |
|
|
2014
Q3 | – | Sell |
-1,248,503
| Closed | -$17.9M | – | 3673 |
|
|
2014
Q2 | $17.9M | Sell |
1,248,503
-976,672
| -44% | -$12.8M | 0.05% | 528 |
|
|
2014
Q1 | $36.5M | Buy |
2,225,175
+1,362,316
| +158% | +$23.9M | 0.11% | 222 |
|
|
2013
Q4 | $9.36M | Buy |
862,859
+700,970
| +433% | +$5.6M | 0.03% | 758 |
|
|
2013
Q3 | $921K | Buy |
+161,889
| New | +$622K | ﹤0.01% | 2168 |
|
Other funds holding ARWR
ACA
FAM
Israel Englander's ARWR Position: Q2 2026 in Review
Israel Englander opened a new position in Arrowhead Research (ARWR) in Q2 2026: 329,337 shares worth $26.8M. The stake represents 0.01% of the portfolio and ranks #1357 among its holdings. This is a return to the name: Israel Englander previously reported a position in ARWR as recently as Q4 2025.
Israel Englander first reported a position in ARWR in Q3 2013 and has held it in 45 quarters since. The position peaked at $36.5M in Q1 2014. 498 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.
- Israel Englander held 329,337 shares of Arrowhead Research worth $26.8M as of Q2 2026.
- Arrowhead Research was a new Israel Englander position in Q2 2026.
- Arrowhead Research made up 0.01% of Israel Englander's portfolio in Q2 2026, its #1357 holding.
- Israel Englander first reported a position in Arrowhead Research in Q3 2013 and has held it in 45 quarters since.
- Israel Englander's Arrowhead Research position peaked at $36.5M in Q1 2014.
- 498 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.
Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.