Annexon, Inc.: which funds bought and sold
Institutions that bought and sold Annexon shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.
Between March 31, 2026 and June 30, 2026, 109 institutions that filed 13F reports for both quarters added to or opened positions in Annexon, and 106 cut or closed them. Together they added a net 22.5M shares, +14.4% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 12.5M shares (+32.6%); index fund managers were net buyers of 8.5M shares (+26.4%). 28 opened a new position and 27 sold out entirely.
Bought, Q2 2026 109 institutions, 28 of them new holders Sold, Q2 2026 106 institutions, 27 of them sold out
Net change, all compared +22.5M shares (+14.4%)
Net change, active managers +12.5M shares (+32.6%), 19 bought, 29 sold
Buyers versus sellers
109 bought 25 106 sold
Active managers and hedge funds 19 bought · 29 sold · +12.5M
Index fund managers 10 bought · 2 sold · +8.5M
Other institutions 80 bought · 75 sold · +1.5M
Biggest buyers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +8.9M +83.5% | 19.5M | $111M |
| Woodline Partners LP Hedge fund | +4.6M +196.3% | 6.9M | $39.5M |
| Goldman Sachs Group Inc | +3.7M +170.6% | 5.8M | $33.3M |
| Mpm Bioimpact LLC | +3.5M New position | 3.5M | $20.2M |
| State Street Corp Index funds | +2.9M +42.0% | 9.8M | $56.1M |
| Blackrock, Inc. Index funds | +2.6M +23.8% | 13.5M | $77.3M |
| Logos Global Management LP Hedge fund | +1.5M New position | 1.5M | $8.6M |
| Candriam S.C.A. | +1.2M New position | 1.2M | $6.8M |
| Mak Capital One LLC | +1.1M +24.1% | 5.9M | $33.5M |
| Great Point Partners LLC | +1.0M +40.0% | 3.5M | $20M |
| Panagora Asset Management Inc Active manager | +968K New position | 968K | $5.5M |
| Vanguard Capital Management LLC Index funds | +914K +15.4% | 6.9M | $39.2M |
| Vanguard Portfolio Management LLC Index funds | +764K +51.5% | 2.2M | $12.8M |
| Arrowstreet Capital, Limited Partnership Hedge fund | +738K New position | 738K | $4.2M |
| Jpmorgan Chase & Co | +680K +210.1% | 1.0M | $5.6M |
| Geode Capital Management, LLC Index funds | +659K +19.5% | 4.0M | $23.1M |
| Ishara Investments LP | +646K +370.6% | 820K | $4.7M |
| Dimensional Fund Advisors LP | +574K +62.1% | 1.5M | $8.6M |
| Siren, L.L.C. | +500K +12.6% | 4.5M | $25.5M |
| Moore Capital Management, LP Hedge fund | +425K New position | 425K | $2.4M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| FMR LLC Active manager | +8.9M +83.5% | 19.5M | $111M |
| Woodline Partners LP Hedge fund | +4.6M +196.3% | 6.9M | $39.5M |
| Logos Global Management LP Hedge fund | +1.5M New position | 1.5M | $8.6M |
| Panagora Asset Management Inc Active manager | +968K New position | 968K | $5.5M |
| Arrowstreet Capital, Limited Partnership Hedge fund | +738K New position | 738K | $4.2M |
| Moore Capital Management, LP Hedge fund | +425K New position | 425K | $2.4M |
| Schonfeld Strategic Advisors LLC Hedge fund | +410K +332.8% | 534K | $3M |
| Engineers Gate Manager LP Hedge fund | +145K +83.2% | 319K | $1.8M |
| Massachusetts Financial Services Co Active manager | +134K +14.8% | 1.0M | $5.9M |
| Squarepoint Ops LLC Hedge fund | +105K +155.0% | 173K | $989,457 |
Biggest sellers
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Bank Of America Corp | −3.6M −85.6% | 614K | $3.5M |
| Redmile Group, LLC | −2.7M −18.4% | 11.9M | $67.8M |
| Nuveen, LLC | −1.5M −34.9% | 2.8M | $15.8M |
| Bellevue Group AG | −1.1M −20.5% | 4.1M | $23.4M |
| Balyasny Asset Management L.P. Hedge fund | −1.1M −27.2% | 2.8M | $16.2M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | −800K −18.6% | 3.5M | $20M |
| Bain Capital Life Sciences Investors, LLC | −775K −14.9% | 4.4M | $25.3M |
| Marshall Wace, LLP Hedge fund | −651K −75.6% | 211K | $1.2M |
| UBS Group AG | −623K −50.0% | 623K | $3.6M |
| Longaeva Partners L.P. | −620K Sold out | 0 | — |
| Opaleye Management Inc. | −617K −26.5% | 1.7M | $9.8M |
| Y-Intercept (Hong Kong) Ltd | −585K −44.3% | 735K | $4.2M |
| Silverarc Capital Management, LLC | −496K Sold out | 0 | — |
| Point72 Asset Management, L.P. Hedge fund | −489K −26.1% | 1.4M | $7.9M |
| D. E. Shaw & Co., Inc. Hedge fund | −438K −62.3% | 265K | $1.5M |
| Invesco Ltd. | −432K −56.7% | 331K | $1.9M |
| Qube Research & Technologies Ltd Hedge fund | −364K −11.7% | 2.7M | $15.7M |
| Price T Rowe Associates Inc Active manager | −299K −69.9% | 129K | $738,000 |
| BNP Paribas Financial Markets | −216K −84.6% | 39K | $224,146 |
| Voloridge Investment Management, LLC Hedge fund | −212K −45.9% | 250K | $1.4M |
| Institution | Change in shares | Shares June 30, 2026 | Value |
|---|---|---|---|
| Balyasny Asset Management L.P. Hedge fund | −1.1M −27.2% | 2.8M | $16.2M |
| Adage Capital Partners Gp, L.L.C. Hedge fund | −800K −18.6% | 3.5M | $20M |
| Marshall Wace, LLP Hedge fund | −651K −75.6% | 211K | $1.2M |
| Point72 Asset Management, L.P. Hedge fund | −489K −26.1% | 1.4M | $7.9M |
| D. E. Shaw & Co., Inc. Hedge fund | −438K −62.3% | 265K | $1.5M |
| Qube Research & Technologies Ltd Hedge fund | −364K −11.7% | 2.7M | $15.7M |
| Price T Rowe Associates Inc Active manager | −299K −69.9% | 129K | $738,000 |
| Voloridge Investment Management, LLC Hedge fund | −212K −45.9% | 250K | $1.4M |
| Algert Global LLC Hedge fund | −155K Sold out | 0 | — |
| Acadian Asset Management LLC Active manager | −129K −17.0% | 629K | $3.6M |
New positions
| Institution | Shares | Value June 30, 2026 |
|---|---|---|
| Mpm Bioimpact LLC | 3.5M | $20.2M |
| Logos Global Management LPHedge fund | 1.5M | $8.6M |
| Candriam S.C.A. | 1.2M | $6.8M |
| Panagora Asset Management IncActive manager | 968K | $5.5M |
| Arrowstreet Capital, Limited PartnershipHedge fund | 738K | $4.2M |
| Moore Capital Management, LPHedge fund | 425K | $2.4M |
| Jump Financial, LLC | 298K | $1.7M |
| Jain Global LLCHedge fund | 65K | $369,545 |
| Diversified Trust Co | 62K | $352,860 |
| Virginia Retirement Systems Et Al | 54K | $310,053 |
Sold out
| Institution | Shares | Value March 31, 2026 |
|---|---|---|
| Longaeva Partners L.P. | 620K | $3.4M |
| Silverarc Capital Management, LLC | 496K | $2.8M |
| Rosalind Advisors, Inc. | 200K | $1.1M |
| Algert Global LLCHedge fund | 155K | $857,814 |
| Man Group PLCHedge fund | 109K | $605,090 |
| Connor, Clark & Lunn Investment Management Ltd. | 93K | $513,597 |
| Polen Capital Management LLCActive manager | 70K | $388,642 |
| Axq Capital, LP | 58K | $322,345 |
| ADAR1 Capital Management, LLCHedge fund | 55K | $304,700 |
| Bit Capital Gmbh | 50K | $277,000 |
Who holds the shares
- Institutions reporting
- 216
- Ten largest holders
- 52.4% of 13F-reported shares
- Index fund managers
- 22.8% of 13F-reported shares
- Active managers and hedge funds
- 28.5% of 13F-reported shares
| Type | Bought | Sold | New | Sold out | Net change in shares | Net % |
|---|---|---|---|---|---|---|
| Active managers and hedge funds | 19 | 29 | 6 | 8 | +12.5M | +32.6% |
| Index fund managers | 10 | 2 | 0 | 0 | +8.5M | +26.4% |
| Other institutions | 80 | 75 | 22 | 19 | +1.5M | +1.7% |