Who owns ANNX?
Institutional ownership of Annexon Inc. from Form 13F, Q2 2026
216 institutional managers reported holding Annexon Inc. (ANNX) in Form 13F filings for Q2 2026, with 178,366,005 shares worth $1.0B. The largest reported holder was FMR LLC. Managers that filed both quarters added a net 22,425,584 shares (+14.4%). 27 opened new positions and 27 sold out.
- Funds holding
- 216
- Value held
- $1.0B
- New / sold out
- 27 / 27
- Net shares, same filers
- +14.4%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of ANNX
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| FMR LLC | $111M | 10.9% | 19,518,496 | Added |
| BlackRock, Inc. | $77.3M | 7.6% | 13,539,744 | Added |
| Redmile Group, LLC | $67.8M | 6.7% | 11,869,877 | Trimmed |
| State Street Corp | $56.1M | 5.5% | 9,824,321 | Added |
| BVF Inc | $49.7M | 4.9% | 8,698,173 | Unchanged |
| Woodline Partners LP | $39.5M | 3.9% | 6,925,067 | Added |
| Vanguard Capital Management LLC | $39.2M | 3.9% | 6,871,015 | Added |
| Mak Capital One LLC | $33.5M | 3.3% | 5,862,180 | Added |
| Goldman Sachs Group Inc | $33.3M | 3.3% | 5,825,579 | Added |
| Siren, L.L.C. | $25.5M | 2.5% | 4,458,646 | Added |
| Bain Capital Life Sciences Investors, LLC | $25.3M | 2.5% | 4,437,731 | Trimmed |
| Bellevue Group AG | $23.4M | 2.3% | 4,100,016 | Trimmed |
| Geode Capital Management, LLC | $23.1M | 2.3% | 4,037,193 | Added |
| MPM Bioimpact LLC | $20.2M | 2.0% | 3,544,354 | New |
| Ameriprise Financial Inc | $20.0M | 2.0% | 3,509,623 | Added |
| Great Point Partners LLC | $20.0M | 2.0% | 3,500,000 | Added |
| Adage Capital Partners GP, L.l.c. | $20.0M | 2.0% | 3,500,000 | Trimmed |
| Morgan Stanley | $18.0M | 1.8% | 3,144,453 | Added |
| Palo Alto Investors LP | $16.8M | 1.7% | 2,948,090 | Unchanged |
| Balyasny Asset Management L.P. | $16.2M | 1.6% | 2,830,976 | Trimmed |
| Nuveen, LLC | $15.8M | 1.6% | 2,765,080 | Trimmed |
| Qube Research & Technologies Ltd | $15.7M | 1.5% | 2,749,961 | Trimmed |
| Vanguard Portfolio Management LLC | $12.8M | 1.3% | 2,246,800 | Added |
| Opaleye Management Inc. | $9.8M | 1.0% | 1,714,451 | Trimmed |
| Logos Global Management LP | $8.6M | 0.8% | 1,500,000 | New |
Share of 13F holdings is each fund's shares as a share of the 178,366,005 ANNX shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- FMR LLC Added+$50.7M
- Woodline Partners LP Added+$26.2M
- Goldman Sachs Group Inc Added+$21.0M
- MPM Bioimpact LLC New+$20.2M
- State Street Corp Added+$16.6M
- BlackRock, Inc. Added+$14.9M
- Logos Global Management LP New+$8.6M
- Candriam S.C.A. New+$6.8M
- Mak Capital One LLC Added+$6.5M
- Great Point Partners LLC Added+$5.7M
Biggest sellers in Q2 2026
- Bank of America Corp Trimmed-$20.8M
- Redmile Group, LLC Trimmed-$15.3M
- Nuveen, LLC Trimmed-$8.5M
- Bellevue Group AG Trimmed-$6.0M
- Balyasny Asset Management L.P. Trimmed-$6.0M
- Adage Capital Partners GP, L.l.c. Trimmed-$4.6M
- Bain Capital Life Sciences Investors, LLC Trimmed-$4.4M
- Marshall Wace, LLP Trimmed-$3.7M
- UBS Group AG Trimmed-$3.6M
- Opaleye Management Inc. Trimmed-$3.5M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $244M and sold $116M; 79 added and 79 trimmed.
Schedule 13D and 13G filings on ANNX
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-08-07STATE STREET CORP SCHEDULE 13G filed by Annexon Inc.Schedule 13G
- 2025-10-30VANGUARD GROUP INC SCHEDULE 13G filed by Annexon Inc.Schedule 13G
- 2025-01-31VANGUARD GROUP INC SCHEDULE 13G filed by Annexon Inc.Schedule 13G
Questions about ANNX ownership
- Who owns ANNX stock?
- 216 institutional investment managers reported ANNX positions in their Form 13F filings for Q2 2026, holding 178,366,005 shares worth $1.0B in total. FMR LLC reported the largest position.
- Are funds buying or selling ANNX?
- In Q2 2026, 27 managers opened new ANNX positions, 79 added, 79 trimmed and 27 sold out. Managers that filed in both quarters added a net 22,425,584 shares.
- How current is this ANNX institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to ANNX by CUSIP. Options are left out. ANNX news and filings · ANNX insider trades · Top funds