John Overdeck’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 | $47.3M | Buy |
580,609
+544,809
| +1,522% | +$40.2M | 0.03% | 581 |
|
|
2026
Q1 | $2.24M | Buy |
+35,800
| New | +$2.27M | ﹤0.01% | 2673 |
|
|
2025
Q3 | – | Sell |
-133,403
| Closed | -$2.11M | – | 3648 |
|
|
2025
Q2 | $2.11M | Sell |
133,403
-701,771
| -84% | -$10.1M | ﹤0.01% | 1804 |
|
|
2025
Q1 | $10.6M | Buy |
835,174
+40,801
| +5% | +$742K | 0.02% | 746 |
|
|
2024
Q4 | $14.9M | Buy |
794,373
+586,062
| +281% | +$12.1M | 0.03% | 588 |
|
|
2024
Q3 | $4.03M | Buy |
208,311
+19,998
| +11% | +$488K | 0.01% | 1185 |
|
|
2024
Q2 | $4.89M | Buy |
188,313
+155,011
| +465% | +$3.81M | 0.01% | 1019 |
|
|
2024
Q1 | $952K | Buy |
33,302
+7,400
| +29% | +$237K | ﹤0.01% | 1987 |
|
|
2023
Q4 | $793K | Sell |
25,902
-242,032
| -90% | -$6.43M | ﹤0.01% | 2211 |
|
|
2023
Q3 | $7.2M | Sell |
267,934
-43,106
| -14% | -$1.32M | 0.02% | 726 |
|
|
2023
Q2 | $11.1M | Buy |
311,040
+220,740
| +244% | +$7.61M | 0.03% | 598 |
|
|
2023
Q1 | $2.29M | Buy |
90,300
+76,355
| +548% | +$2.4M | 0.01% | 1298 |
|
|
2022
Q4 | $566K | Buy |
+13,945
| New | +$462K | ﹤0.01% | 1969 |
|
|
2022
Q3 | – | Sell |
-42,886
| Closed | -$1.51M | – | 2464 |
|
|
2022
Q2 | $1.51M | Buy |
42,886
+36,257
| +547% | +$1.36M | 0.01% | 1341 |
|
|
2022
Q1 | $305K | Buy |
+6,629
| New | +$328K | ﹤0.01% | 2208 |
|
|
2021
Q3 | – | Sell |
-74,200
| Closed | -$6.14M | – | 4220 |
|
|
2021
Q2 | $6.14M | Buy |
74,200
+22,338
| +43% | +$1.66M | 0.01% | 1077 |
|
|
2021
Q1 | $3.44M | Buy |
+51,862
| New | +$4.02M | 0.01% | 1299 |
|
|
2020
Q3 | – | Sell |
-31,787
| Closed | -$1.37M | – | 3060 |
|
|
2020
Q2 | $1.37M | Sell |
31,787
-540,616
| -94% | -$19.1M | 0.01% | 1311 |
|
|
2020
Q1 | $16.5M | Buy |
572,403
+415,952
| +266% | +$16.8M | 0.13% | 156 |
|
|
2019
Q4 | $9.92M | Buy |
+156,451
| New | +$7.76M | 0.03% | 623 |
|
|
2018
Q4 | – | Sell |
-235,216
| Closed | -$4.51M | – | 2967 |
|
|
2018
Q3 | $4.51M | Buy |
235,216
+46,852
| +25% | +$769K | 0.01% | 997 |
|
|
2018
Q2 | $2.56M | Buy |
+188,364
| New | +$1.76M | 0.01% | 1456 |
|
|
2018
Q1 | – | Sell |
-39,726
| Closed | -$146K | – | 3109 |
|
|
2017
Q4 | $146K | Buy |
+39,726
| New | +$148K | ﹤0.01% | 2967 |
|
|
2014
Q2 | – | Sell |
-106,599
| Closed | -$1.75M | – | 2133 |
|
|
2014
Q1 | $1.75M | Buy |
106,599
+92,309
| +646% | +$1.62M | 0.01% | 992 |
|
|
2013
Q4 | $155K | Buy |
+14,290
| New | +$114K | ﹤0.01% | 2041 |
|
Other funds holding ARWR
ACA
FAM
John Overdeck's ARWR Position: Q2 2026 in Review
John Overdeck increased its Arrowhead Research (ARWR) stake by 1,522% in Q2 2026, buying an estimated $40.2M and bringing the position to 580,609 shares worth $47.3M. The position accounts for 0.03% of the portfolio, ranked #581.
John Overdeck first reported a position in ARWR in Q4 2013 and has held it in 25 quarters since. 498 funds tracked by Wall St. Rank hold ARWR as of Q2 2026.
- John Overdeck held 580,609 shares of Arrowhead Research worth $47.3M as of Q2 2026.
- John Overdeck bought 544,809 Arrowhead Research shares in Q2 2026, an estimated $40.2M.
- Arrowhead Research made up 0.03% of John Overdeck's portfolio in Q2 2026, its #581 holding.
- John Overdeck first reported a position in Arrowhead Research in Q4 2013 and has held it in 25 quarters since.
- 498 funds tracked by Wall St. Rank held Arrowhead Research as of Q2 2026.
Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.