Annexon, Inc.
ANNX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001528115
In the last 90 days, Annexon, Inc. insiders filed 1 open-market purchase and 0 sales; 216 institutions reported holding it in 13F filings for Q2 2026, worth $1.02B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Annexon, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 217
- +51 vs. Q4 2025
- Shares held
- 155.9M
- +26.8M (+20.8%) vs. Q4 2025
- Total value
- $863.7M
- +$215.6M (+33.3%) vs. Q4 2025
- New holders
- 66
- 87 more added
- Sold out
- 15
- 49 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting ANNX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 216 | $1.02B |
| Q1 2026 | 217 | $863.7M |
| Q4 2025 | 168 | $687.2M |
| Q3 2025 | 144 | $309.2M |
| Q2 2025 | 129 | $238.7M |
| Q1 2025 | 148 | $192.1M |
| Q4 2024 | 153 | $574.6M |
| Q3 2024 | 142 | $651.8M |
| Q2 2024 | 140 | $526.9M |
| Q1 2024 | 127 | $679.4M |
| Q4 2023 | 99 | $365.7M |
| Q3 2023 | 93 | $126.0M |
| Q2 2023 | 95 | $190.0M |
| Q1 2023 | 100 | $207.6M |
| Q4 2022 | 84 | $243.3M |
| Q3 2022 | 72 | $292.3M |
| Q2 2022 | 78 | $144.9M |
| Q1 2022 | 100 | $105.9M |
| Q4 2021 | 97 | $445.7M |
| Q3 2021 | 82 | $708.6M |
| Q2 2021 | 74 | $873.7M |
| Q1 2021 | 72 | $1.04B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Annexon, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Qube Research & Technologies Ltd | 3,114,314 | $17.3M | 0.02% | +732,835+30.8% | Added |
| Geode Capital Management, LLC | 3,377,823 | $18.7M | 0.00% | +474,927+16.4% | Added |
| Ameriprise Financial Inc | 3,449,121 | $19.1M | 0.00% | −899,661−20.7% | Reduced |
| Balyasny Asset Management LLC | 3,886,909 | $21.5M | 0.04% | +587,653+17.8% | Added |
| Siren, L.L.C. | 3,958,646 | $21.9M | 0.61% | +3,958,646 | New |
| Nuveen, LLC | 4,246,330 | $23.5M | 0.01% | +1,331,006+45.7% | Added |
| Bank of America Corp | 4,259,995 | $23.6M | 0.00% | +2,654,414+165.3% | Added |
| Adage Capital Partners GP, L.L.C. | 4,300,000 | $23.8M | 0.04% | −1,200,000−21.8% | Reduced |
| Mak Capital One LLC | 4,724,043 | $26.2M | 4.33% | +1,765,516+59.7% | Added |
| Bellevue Group AG | 5,157,290 | $28.6M | 0.68% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 5,212,674 | $28.9M | 2.60% | −36,395−0.7% | Reduced |
| Vanguard Capital Management LLC | 5,956,589 | $33.0M | 0.00% | +5,956,589 | New |
| State Street Corp | 6,919,255 | $38.3M | 0.00% | +2,267,070+48.7% | Added |
| BVF Inc | 8,698,173 | $48.2M | 1.54% | −429,907−4.7% | Reduced |
| FMR LLC | 10,635,648 | $58.9M | 0.00% | +413,178+4.0% | Added |
| BlackRock, Inc. | 10,938,509 | $60.6M | 0.00% | +1,978,075+22.1% | Added |
| Redmile Group, LLC | 14,549,768 | $80.6M | 5.34% | +4,499,124+44.8% | Added |
| Sphera Funds Management Ltd. | 0 | $0 | 0.00% | −1,316,212−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −438,497−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −122,858−100.0% | Sold out |
| Caption Management, LLC | 0 | $0 | 0.00% | −119,491−100.0% | Sold out |
| Citizens Financial Group Inc | 0 | $0 | 0.00% | −40,000−100.0% | Sold out |
| Pale Fire Capital SE | 0 | $0 | 0.00% | −38,600−100.0% | Sold out |
| Landing Point Financial Group, LLC | 0 | $0 | 0.00% | −34,900−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −28,071−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −25,651−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −14,184−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −10,268−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −3,144−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −352−100.0% | Sold out |
| Assetmark, Inc | 0 | $0 | 0.00% | −333−100.0% | Sold out |
| Northwestern Mutual Wealth Management Co | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |