Arrowhead Pharmaceuticals Ownership | Who Owns Arrowhead Pharmaceuticals?
Arrowhead Pharmaceuticals Ownership Summary
Arrowhead Pharmaceuticals is owned by 18.39% institutional investors, 4.41% insiders, and 77.20% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 14.55% of ARWR shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.41% of its assets in Arrowhead Pharmaceuticals shares.
ARWR Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Arrowhead Pharmaceuticals | 18.39% | 4.41% | 77.20% |
| Sector | Healthcare Stocks | 41.87% | 10.80% | 47.33% |
| Industry | Biotech Stocks | 43.97% | 10.75% | 45.28% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 20.22M | 14.55% | $697.55M |
| Blackrock | 15.68M | 12.72% | $407.61M |
| Vanguard group | 16.04M | 11.53% | $553.08M |
| Avoro capital advisors | 10.90M | 7.84% | $375.94M |
| State street | 6.40M | 4.60% | $220.65M |
| Fmr | 5.76M | 4.14% | $198.66M |
| Slate path capital lp | 4.98M | 3.58% | $171.83M |
| Geode capital management | 3.13M | 2.25% | $108.01M |
| Siren | 2.67M | 1.92% | $92.08M |
| Norges bank | 2.05M | 1.72% | $38.62M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Aquilo capital management | 707.59K | 20.06% | $13.30M |
| Western financial corp/ca | 820.24K | 12.31% | $28.29M |
| Avoro capital advisors | 10.90M | 4.86% | $375.94M |
| Siren | 2.67M | 3.60% | $92.08M |
| M28 capital management lp | 67.40K | 3.42% | $2.32M |
| Privium fund management b.v. | 473.95K | 2.94% | $16.35M |
| Slate path capital lp | 4.98M | 2.66% | $171.83M |
| Exome asset management | 104.51K | 2.18% | $3.60M |
| Wealth effects | 168.45K | 1.87% | $5.81M |
| Johnson & johnson | 247.60K | 1.70% | $8.54M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Driehaus capital management | 2.10M | 0.52% | 2.10M |
| Norges bank | 2.05M | 0.01% | 2.05M |
| Arrowstreet capital, limited partnership | 2.08M | 0.05% | 2.02M |
| Deerfield management company, l.p. (series c) | 993.00K | 0.52% | 993.00K |
| Blackrock funding, inc. /de | 20.22M | 0.01% | 799.94K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Rokos capital management llp | - | - | -939.98K |
| Ubs asset management americas | 1.76M | 0.01% | -924.83K |
| T. rowe price investment management | - | - | -822.34K |
| Orbimed advisors | - | - | -739.65K |
| Marshall wace, llp | 1.44M | 0.05% | -719.16K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Driehaus capital management | 2.10M | 0.52% | 2.10M | $72.41M |
| Norges bank | 2.05M | 0.01% | 2.05M | $38.62M |
| Deerfield management company, l.p. (series c) | 993.00K | 0.52% | 993.00K | $34.25M |
| Voloridge investment management | 402.66K | 0.05% | 402.66K | $13.89M |
| Fred alger management | 306.83K | 0.04% | 306.83K | $10.58M |
Sold Out
| Holder | Change |
|---|---|
| Toronto dominion bank | -3.00 |
| Financial gravity asset management | -4.00 |
| National bank of canada /fi/ | -10.00 |
| Innealta capital | -11.00 |
| Advisornet financial | -12.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Sep 30, 2025 | 128 | -57.19% | 25,567,183 | -75.82% | 18 | 0.32% | 64 | -58.97% | 30 | -62.50% |
| Jun 30, 2025 | 293 | 6.55% | 105,554,949 | 2.21% | 75 | 1.29% | 151 | 19.84% | 79 | -2.47% |
| Mar 31, 2025 | 275 | -4.84% | 103,269,262 | 3.49% | 76 | 1.20% | 128 | -7.25% | 80 | -8.05% |
| Dec 31, 2024 | 285 | 1.42% | 99,767,650 | 4.15% | 79 | 1.25% | 133 | 7.26% | 88 | -3.30% |
| Sep 30, 2024 | 278 | -1.77% | 95,591,794 | -2.21% | 76 | 1.22% | 124 | -8.15% | 89 | 7.23% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 7.47M | 5.41% | - |
| iShares Core S&P Mid-Cap ETF | 4.05M | 3.25% | 13.43K |
| Vanguard Total Stock Mkt Idx Inv | 3.79M | 2.74% | -80.50K |
| Vanguard US Total Market Shares ETF | 3.70M | 2.70% | 3.98K |
| iShares Russell 2000 ETF | 2.91M | 2.11% | - |
| Vanguard Small Cap Index | 2.85M | 2.06% | -17.58K |
| Fidelity Growth Compy Commingled Pl S | 2.45M | 1.77% | 177.56K |
| Fidelity Growth Company Fund | 1.76M | 1.27% | 131.28K |
| SPDR® S&P Biotech ETF | 1.73M | 1.25% | 3.86K |
| Vanguard Small Cap Growth Index Inv | 1.61M | 1.17% | -1.76K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Oct 01, 2025 | Hamilton James C | Chief Medical Officer | Sell | $700.00K |
| Sep 12, 2025 | Hamilton James C | Chief Medical Officer | Sell | $450.00K |
| Sep 02, 2025 | Hamilton James C | Chief Medical Officer | Sell | $375.00K |
| Aug 15, 2025 | Hamilton James C | Chief Medical Officer | Sell | $187.78K |
| Aug 13, 2025 | Hamilton James C | Chief Medical Officer | Sell | $12.22K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q4 | - | 1 |
| 2025 Q3 | - | 4 |
| 2025 Q2 | - | 5 |
| 2025 Q1 | - | 14 |
| 2024 Q4 | - | 10 |
ARWR Ownership FAQ
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