Security record · archived quarter
ANNX
Annexon, Inc. · Healthcare · Biotechnology
16Tracked holders
+1Δ holders
41.50MShares held
$126.59MReported value
+2New positions
−1Exits
Momentum inputs (comparable managers):
holder breadth +6.7% ·
share flow -3.9% ·
net new positions +6.2%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 83 | 0 | 98.98M | $564.98M | +7 | −7 |
| Q1 2026 | 86 | +9 | 86.15M | $477.02M | +15 | −6 |
| Q4 2025 | 77 | +3 | 76.53M | $384.12M | +3 | — |
| Q3 2025 | 16 | +1 | 41.50M | $126.59M | +2 | −1 |
| Q2 2025 | 12 | 0 | 37.67M | $90.40M | +2 | −2 |
| Q1 2025 | 9 | -2 | 6.64M | $12.81M | — | −2 |
| Q4 2024 | 11 | -2 | 14.57M | $74.72M | — | −2 |
| Q3 2024 | 12 | +1 | 12.67M | $75.00M | +1 | — |
| Q2 2024 | 11 | — | 15.25M | $74.74M | — | — |
Who holds it · Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 11.08M | -29.4% | $33.80M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 2 | Fidelity (FMR) ✦ | 11.08M | -29.4% | $33.80M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 3 | Fidelity (FMR) ✦ | 11.08M | -29.4% | $33.80M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | Fidelity (FMR) ✦ | 11.08M | -29.4% | $33.80M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 11.08M | -29.4% | $33.80M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 7.90M | -0.8% | $24.09M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 14 | The Vanguard Group ✦ (passive) | 5.84M | +8.7% | $17.80M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 15 | The Vanguard Group ✦ (passive) | 5.84M | +8.7% | $17.80M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | The Vanguard Group ✦ (passive) | 5.84M | +8.7% | $17.80M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 18 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 19 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 20 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 21 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 22 | Morgan Stanley ✦ | 3.03M | — | $9.24M | 0.0% | n/c | 1 | SEC ↗ |
| 23 | Millennium Management ✦ | 2.82M | +12.3% | $8.61M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 24 | Geode Capital Management ✦ (passive) | 2.44M | +6.7% | $7.43M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 25 | Geode Capital Management ✦ (passive) | 2.44M | +6.7% | $7.43M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 26 | Goldman Sachs Group ✦ | 2.41M | — | $7.34M | 0.0% | n/c | 1 | SEC ↗ |
| 27 | Goldman Sachs Group ✦ | 2.41M | — | $7.34M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Goldman Sachs Group ✦ | 2.41M | — | $7.34M | 0.0% | n/c | 1 | SEC ↗ |
| 29 | State Street Global Advisors ✦ (passive) | 2.05M | +3.5% | $6.25M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 30 | Adage Capital Partners ✦ | 1.50M | New | $4.58M | 0.0% | New | 1 | SEC ↗ |
| 31 | Renaissance Technologies ✦ | 753.58K | -3.1% | $2.30M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 32 | AQR Capital Management ✦ | 574.12K | +72.9% | $1.75M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 33 | AQR Capital Management ✦ | 574.12K | +72.9% | $1.75M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 34 | AQR Capital Management ✦ | 574.12K | +72.9% | $1.75M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 35 | AQR Capital Management ✦ | 574.12K | +72.9% | $1.75M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 36 | AQR Capital Management ✦ | 574.12K | +72.9% | $1.75M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 37 | T. Rowe Price ✦ | 484.77K | -4.6% | $1.48M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 38 | T. Rowe Price ✦ | 484.77K | -4.6% | $1.48M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 39 | Two Sigma Investments ✦ | 279.13K | +38.8% | $851,359 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 40 | Citadel Advisors ✦ | 167.50K | +1162.5% | $510,875 | 0.0% | ▲ Add | 5 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 93.77K | — | $286,006 | 0.0% | n/c | 1 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 93.77K | — | $286,006 | 0.0% | n/c | 1 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 93.77K | — | $286,006 | 0.0% | n/c | 1 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 93.77K | — | $286,006 | 0.0% | n/c | 1 | SEC ↗ |
| 45 | Point72 Asset Management ✦ | 90.05K | New | $274,650 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Adage Capital Partners | $4.58M | 0.0% |
| Point72 Asset Management | $274,650 | 0.0% |
Exited
| Marshall Wace | $71,974 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 216 holders, 155.62M shares, $854.15M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q3 2025 ·
Methodology ·
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