ANNX Annexon, Inc.
Annexon, Inc. (ANNX) Institutional Ownership
What the institutions did with ANNX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| FMR LLC | 19.5M | 10.9% |
| BlackRock, Inc. | 13.5M | 7.6% |
| Redmile Group, LLC | 11.9M | 6.7% |
| STATE STREET CORP | 9.8M | 5.5% |
| BVF INC/IL | 8.7M | 4.9% |
| Woodline Partners LP | 6.9M | 3.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.9M | 3.9% |
| MAK CAPITAL ONE LLC | 5.9M | 3.3% |
| GOLDMAN SACHS GROUP INC | 5.8M | 3.3% |
| Siren, L.L.C. | 4.5M | 2.5% |
| Bain Capital Life Sciences Investors, LLC | 4.4M | 2.5% |
| Bellevue Group AG | 4.1M | 2.3% |
| GEODE CAPITAL MANAGEMENT, LLC | 4.0M | 2.3% |
| MPM BIOIMPACT LLC | 3.5M | 2.0% |
| AMERIPRISE FINANCIAL INC | 3.5M | 2.0% |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | 3.5M | 2.0% |
| GREAT POINT PARTNERS LLC | 3.5M | 2.0% |
| MORGAN STANLEY | 3.1M | 1.8% |
| Palo Alto Investors LP | 2.9M | 1.7% |
| Balyasny Asset Management L.P. | 2.8M | 1.6% |
| Nuveen, LLC | 2.8M | 1.6% |
| Qube Research & Technologies Ltd | 2.7M | 1.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.2M | 1.3% |
| Opaleye Management Inc. | 1.7M | 1.0% |
| Logos Global Management LP | 1.5M | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| FMR LLC | Increased | 10.6M | 19.5M | +8.9M |
| Woodline Partners LP | Increased | 2.3M | 6.9M | +4.6M |
| GOLDMAN SACHS GROUP INC | Increased | 2.2M | 5.8M | +3.7M |
| BANK OF AMERICA CORP /DE/ | Reduced | 4.3M | 614.2K | -3.6M |
| MPM BIOIMPACT LLC | New | 0 | 3.5M | +3.5M |
| STATE STREET CORP | Increased | 6.9M | 9.8M | +2.9M |
| Redmile Group, LLC | Reduced | 14.5M | 11.9M | -2.7M |
| BlackRock, Inc. | Increased | 10.9M | 13.5M | +2.6M |
| Logos Global Management LP | New | 0 | 1.5M | +1.5M |
| Nuveen, LLC | Reduced | 4.2M | 2.8M | -1.5M |
| Candriam S.C.A. | New | 0 | 1.2M | +1.2M |
| MAK CAPITAL ONE LLC | Increased | 4.7M | 5.9M | +1.1M |
| Bellevue Group AG | Reduced | 5.2M | 4.1M | -1.1M |
| Balyasny Asset Management L.P. | Reduced | 3.9M | 2.8M | -1.1M |
| GREAT POINT PARTNERS LLC | Increased | 2.5M | 3.5M | +1.0M |
| PANAGORA ASSET MANAGEMENT INC | New | 0 | 967.9K | +967.9K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 6.0M | 6.9M | +914.4K |
| ADAGE CAPITAL PARTNERS GP, L.L.C. | Reduced | 4.3M | 3.5M | -800.0K |
| Bain Capital Life Sciences Investors, LLC | Reduced | 5.2M | 4.4M | -774.9K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 1.5M | 2.2M | +763.7K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | New | 0 | 737.9K | +737.9K |
| JPMORGAN CHASE & CO | Increased | 323.9K | 1.0M | +680.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 3.4M | 4.0M | +659.4K |
| MARSHALL WACE, LLP | Reduced | 861.5K | 210.6K | -650.9K |
| Ishara Investments LP | Increased | 174.3K | 820.0K | +645.8K |
| UBS Group AG | Reduced | 1.2M | 623.1K | -622.8K |
| Longaeva Partners L.P. | Sold Out | 620.4K | 0 | -620.4K |
| Opaleye Management Inc. | Reduced | 2.3M | 1.7M | -617.3K |
| Y-Intercept (Hong Kong) Ltd | Reduced | 1.3M | 734.6K | -585.3K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 924.1K | 1.5M | +573.7K |
| Siren, L.L.C. | Increased | 4.0M | 4.5M | +500.0K |
| SILVERARC CAPITAL MANAGEMENT, LLC | Sold Out | 496.5K | 0 | -496.5K |
| Point72 Asset Management, L.P. | Reduced | 1.9M | 1.4M | -489.1K |
| D. E. Shaw & Co., Inc. | Reduced | 702.8K | 265.3K | -437.5K |
| Invesco Ltd. | Reduced | 763.0K | 330.7K | -432.3K |
| MOORE CAPITAL MANAGEMENT, LP | New | 0 | 425.3K | +425.3K |
| Schonfeld Strategic Advisors LLC | Increased | 123.3K | 533.6K | +410.3K |
| MORGAN STANLEY | Increased | 2.7M | 3.1M | +408.5K |
| Qube Research & Technologies Ltd | Reduced | 3.1M | 2.7M | -364.4K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 428.7K | 129.2K | -299.5K |
| Jump Financial, LLC | New | 0 | 297.8K | +297.8K |
| WELLS FARGO & COMPANY/MN | Increased | 698.7K | 978.1K | +279.3K |
| NORTHERN TRUST CORP | Increased | 1.1M | 1.4M | +265.1K |
| STATE OF WISCONSIN INVESTMENT BOARD | Increased | 49.7K | 286.4K | +236.6K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 888.6K | 1.1M | +216.9K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 255.4K | 39.3K | -216.1K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Reduced | 462.1K | 250.0K | -212.0K |
| CITIGROUP INC | Increased | 30.8K | 236.0K | +205.2K |
| Rosalind Advisors, Inc. | Sold Out | 200.0K | 0 | -200.0K |
| DAFNA Capital Management LLC | Increased | 117.8K | 297.8K | +180.0K |
| Ensign Peak Advisors, Inc | Increased | 625.1K | 800.5K | +175.4K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 1.1M | 1.3M | +155.4K |
| ALGERT GLOBAL LLC | Sold Out | 154.8K | 0 | -154.8K |
| Ikarian Capital, LLC | Reduced | 580.2K | 430.2K | -150.0K |
| OSAIC HOLDINGS, INC. | Increased | 1.3K | 147.6K | +146.4K |
| Engineers Gate Manager LP | Increased | 174.1K | 319.1K | +144.9K |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Increased | 903.4K | 1.0M | +134.0K |
| ACADIAN ASSET MANAGEMENT LLC | Reduced | 758.2K | 629.1K | -129.1K |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 7.2K | 134.3K | +127.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 158.6K | 39.4K | -119.2K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.