Annexon Ownership | Who Owns Annexon?
Annexon Ownership Summary
Annexon is owned by 67.25% institutional investors, 0.42% insiders, and 32.33% retail investors. Fmr is the largest institutional shareholder, holding 10.17% of ANNX shares. BB Biotech AG Ord is the top mutual fund, with 4.84% of its assets in Annexon shares.
ANNX Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Annexon | 67.25% | 0.42% | 32.33% |
| Sector | Healthcare Stocks | 487.91% | 11.08% | -398.99% |
| Industry | Biotech Stocks | 307.10% | 11.11% | -218.21% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Fmr | 14.22M | 10.17% | $72.97M |
| Blackrock funding, inc. /de | 7.96M | 5.38% | $19.11M |
| Blackrock | 6.59M | 5.37% | $32.28M |
| Alerce investment management | 7.41M | 5.29% | $37.99M |
| Bvf inc/il | 7.00M | 4.73% | $16.80M |
| Redmile group | 6.30M | 4.25% | $15.12M |
| Vanguard group | 5.55M | 3.96% | $28.46M |
| Bain capital life sciences investors | 5.25M | 3.54% | $12.60M |
| Bellevue group | 5.16M | 3.48% | $12.38M |
| State street | 4.51M | 3.22% | $23.14M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Alerce investment management | 7.41M | 66.89% | $37.99M |
| Sio capital management | 4.10M | 3.75% | $9.83M |
| Redmile group | 6.30M | 1.61% | $15.12M |
| Bain capital life sciences investors | 5.25M | 1.58% | $12.60M |
| Tfg asset management gp | 2.65M | 1.17% | $5.11M |
| Sphera funds management | 1.76M | 0.99% | $4.23M |
| Logos global management lp | 2.41M | 0.64% | $5.78M |
| Bvf inc/il | 7.00M | 0.60% | $16.80M |
| Sirios capital management l p | 989.58K | 0.34% | $2.37M |
| Ghost tree capital | 214.50K | 0.33% | $1.05M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Fmr | 14.22M | 0.00% | 5.66M |
| Blackrock | 6.59M | 0.00% | 1.54M |
| Tfg asset management gp | 2.65M | 1.17% | 1.25M |
| Ameriprise financial | 926.64K | 0.00% | 767.87K |
| Sio capital management | 4.10M | 3.75% | 697.98K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Adage capital partners gp | - | - | -2.84M |
| Gmt capital | - | - | -1.91M |
| Pictet asset management sa | - | - | -1.64M |
| Logos global management lp | 2.41M | 0.64% | -1.59M |
| Eventide asset management | - | - | -1.02M |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Ghost tree capital | 214.50K | 0.33% | 214.50K | $1.05M |
| Susquehanna portfolio strategies | 207.72K | 0.01% | 207.72K | $498.52K |
| Lmr partners llp | 120.00K | 0.01% | 120.00K | $588.00K |
| Natixis | 77.10K | 0.00% | 77.10K | $185.04K |
| Ubs asset management americas | 49.06K | 0.00% | 49.06K | $251.69K |
Sold Out
| Holder | Change |
|---|---|
| National bank of canada /fi/ | -2.00 |
| Nelson, van denburg & campbell wealth management group | -9.00 |
| Quadrant capital group | -34.00 |
| Lindbrook capital | -83.00 |
| Smartleaf asset management | -119.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Jun 30, 2025 | 129 | -15.13% | 99,605,116 | -0.16% | 67 | 1.48% | 67 | -15.19% | 34 | -17.07% |
| Mar 31, 2025 | 10 | -93.59% | 26,197,503 | -76.64% | 17 | 0.28% | 4 | -95.51% | - | -100.00% |
| Dec 31, 2024 | 155 | 6.16% | 112,163,548 | 1.74% | 80 | 1.29% | 88 | 10.00% | 38 | 2.70% |
| Sep 30, 2024 | 146 | -7.01% | 110,248,434 | 2.42% | 78 | 1.02% | 80 | -18.37% | 37 | 15.63% |
| Jun 30, 2024 | 157 | 16.30% | 107,640,091 | 13.59% | 87 | 1.47% | 98 | 22.50% | 32 | 14.29% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| BB Biotech AG Ord | 5.16M | 4.84% | - |
| FIAM Small Cap Core CIT Cl B | 3.45M | 3.14% | 2.46M |
| Vanguard Total Stock Mkt Idx Inv | 3.11M | 2.83% | 99.45K |
| Vanguard US Total Market Shares ETF | 2.83M | 2.58% | - |
| Candriam Eqs L Biotech C USD Cap | 2.53M | 2.31% | - |
| Fidelity Growth Compy Commingled Pl O | 2.37M | 2.25% | - |
| SPDR® S&P Biotech ETF | 2.32M | 2.11% | -14.13K |
| iShares Russell 2000 ETF | 2.31M | 2.10% | - |
| Fidelity Growth Compy Commingled Pl S | 1.85M | 1.68% | -604.61K |
| Columbia Small Cap Value I A | 1.36M | 1.24% | 37.30K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Sep 30, 2025 | Carson William H. | - | Buy | $12.55K |
| Sep 02, 2025 | Carson William H. | - | Buy | $8.60K |
| Jul 30, 2025 | Carson William H. | - | Buy | $10.00K |
| Jul 14, 2025 | Yednock Ted | EVP & CHIEF INNOVATION OFFICER | Sell | $2.88K |
| Jul 14, 2025 | Lew Jennifer | EVP & CHIEF FINANCIAL OFFICER | Sell | $2.88K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2025 Q3 | 3 | 3 |
| 2025 Q2 | 1 | - |
| 2025 Q1 | - | 9 |
| 2024 Q4 | 2 | 1 |
| 2024 Q3 | 3 | 7 |
ANNX Ownership FAQ
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