Who owns Annexon, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ANNX from SEC Form 13F filings across 216 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 216 institutions disclosed 178.4M shares of Annexon, Inc. worth $1.02B — about 88.7% of shares outstanding; the largest disclosed holder is FMR LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
216
13F holders
$1.02B
value, 2026 filers
88.7%
of shares outstanding (178.4M sh)
31
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ANNX's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | FMR LLC | 19.5M | $111.5M | 0.0% | 9.7% | +83.5% |
| 2 | BlackRock, Inc. | 13.5M | $77.3M | 0.0% | 6.7% | +23.8% |
| 3 | Redmile Group, LLC | 11.9M | $67.8M | 4.6% | 5.9% | -18.4% |
| 4 | STATE STREET CORP | 9.8M | $56.1M | 0.0% | 4.9% | +42.0% |
| 5 | BVF INC/IL | 8.7M | $49.7M | 1.3% | 4.3% | 0.0% |
| 6 | Woodline Partners LP | 6.9M | $39.5M | 0.1% | 3.4% | +196.3% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 6.9M | $39.2M | 0.0% | 3.4% | +15.4% |
| 8 | MAK CAPITAL ONE LLC | 5.9M | $33.5M | 4.7% | 2.9% | +24.1% |
| 9 | GOLDMAN SACHS GROUP INC | 5.8M | $33.3M | 0.0% | 2.9% | +170.6% |
| 10 | Siren, L.L.C. | 4.5M | $25.5M | 0.5% | 2.2% | +12.6% |
| 11 | Bain Capital Life Sciences Investors, LLC | 4.4M | $25.3M | 1.5% | 2.2% | -14.9% |
| 12 | Bellevue Group AG | 4.1M | $23.4M | 0.5% | 2% | -20.5% |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | 4.0M | $23.1M | 0.0% | 2% | +19.5% |
| 14 | MPM BIOIMPACT LLCNEW | 3.5M | $20.2M | 1.2% | 1.8% | new |
| 15 | AMERIPRISE FINANCIAL INC | 3.5M | $20.0M | 0.0% | 1.7% | +1.8% |
| 16 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 3.5M | $20.0M | 0.0% | 1.7% | -18.6% |
| 17 | GREAT POINT PARTNERS LLC | 3.5M | $20.0M | 3.8% | 1.7% | +40.0% |
| 18 | MORGAN STANLEY | 3.1M | $18.0M | 0.0% | 1.6% | +14.9% |
| 19 | Palo Alto Investors LP | 2.9M | $16.8M | 2.3% | 1.5% | 0.0% |
| 20 | Balyasny Asset Management L.P. | 2.8M | $16.2M | 0.0% | 1.4% | -27.2% |
| 21 | Nuveen, LLC | 2.8M | $15.8M | 0.0% | 1.4% | -34.9% |
| 22 | Qube Research & Technologies Ltd | 2.7M | $15.7M | 0.0% | 1.4% | -11.7% |
| 23 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.2M | $12.8M | 0.0% | 1.1% | +51.5% |
| 24 | Opaleye Management Inc. | 1.7M | $9.8M | 0.9% | 0.9% | -26.5% |
| 25 | Logos Global Management LPNEW | 1.5M | $8.6M | 0.4% | 0.7% | new |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.