Reported 5,862,180 shares, up 1,138,137 (24.1%) from the prior quarter.
Reported value 27.9%; share count 24.1% vs. the prior quarter.
Reported position value by quarter
Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.
| Date | Holding Value |
|---|---|
| 2025-12-31 | 14851806 |
| 2026-03-31 | 26171198 |
| 2026-06-30 | 33473048 |
Quarterly position history
How this manager's reported quarter-end position changed over time.
| Quarter | Activity | Shares | Change | % of reported 13F | Reported value | Filed | Source filing |
|---|---|---|---|---|---|---|---|
| Q2 2026 | Added | 5,862,180 | +1,138,137 (24.1%) | 4.69% | $33,473,048 | 2026-08-14 | |
| Q1 2026 | Added | 4,724,043 | +1,765,516 (59.7%) | 3.86% | $26,171,198 | 2026-05-15 | |
| Q4 2025 | New | 2,958,527 | +2,958,527 (0.0%) | 1.63% | $14,851,806 | 2026-02-17 |
Who else reported the position
245 managers reported ANNEXON INC for Q2 2026.
| Manager | Activity | Shares | Change | % of reported 13F | Reported value | Tenure |
|---|---|---|---|---|---|---|
| FMR LLC | Added | 19,518,496 | +8,882,848 | < 0.01% | $111,450,614 | 24 qtrs |
| BlackRock Inc | Added | 13,539,744 | +2,601,235 | < 0.01% | $77,311,938 | 8 qtrs |
| Redmile Group LLC | Reduced | 11,869,877 | -2,679,891 | 4.55% | $67,776,998 | 24 qtrs |
| STATE STREET CORPORATION | Added | 9,824,321 | +2,905,066 | < 0.01% | $56,096,873 | 24 qtrs |
| BVF INC IL | Unchanged | 8,698,173 | 0 | 1.27% | $49,666,568 | 11 qtrs |
| Woodline Partners LP | Added | 6,925,067 | +4,587,930 | 0.12% | $39,542,133 | 17 qtrs |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | 6,871,015 | +914,426 | < 0.01% | $39,233,496 | 2 qtrs |
| MAK CAPITAL ONE LLC This report | Added | 5,862,180 | +1,138,137 | 4.69% | $33,473,048 | 3 qtrs |
| The Goldman Sachs Group Inc | Added | 5,825,579 | +3,672,699 | < 0.01% | $33,264,057 | 23 qtrs |
| Siren L L C | Added | 4,458,646 | +500,000 | 0.52% | $25,458,869 | 2 qtrs |
Filing details and methodology As reported
- Report period
- June 30, 2026
- Filed
- August 14, 2026
- Filing type
- 13F-HR
- Position type
- COM
Voting authority reported
- Sole
- 5,862,180
- Shared
- 0
- None
- 0
“None” means the manager reported no voting authority for those shares on non-routine matters. It does not disclose why and is not evidence of securities lending.
Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.