Annexon, Inc. ANNX
CIK 0001528115 · CUSIP 03589W102
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | FMR LLC CIK 315066 · View history | $37.67M 15,695,226 shares | 0.00% | +2.43M(+18.30%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 02 | BlackRock, Inc. CIK 2012383 · View history | $19.11M 7,962,368 shares | 0.00% | -564.14K(-6.60%)Reduced | SEC filing ↗ Aug 12, 2025 | ▾ |
| 03 | BVF INC/IL CIK 1056807 · View history | $16.80M 7,000,000 shares | 0.60% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 04 | Redmile Group, LLC CIK 1425738 · View history | $15.12M 6,300,644 shares | 1.61% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 05 | VANGUARD GROUP INC CIK 102909 · View history | $12.88M 5,366,039 shares | 0.00% | -13.62K(-0.30%)Reduced | SEC filing ↗ Aug 11, 2025 | ▾ |
| 06 | Bain Capital Life Sciences Investors, LLC CIK 1703031 · View history | $12.60M 5,249,069 shares | 1.58% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 07 | Bellevue Group AG CIK 1674546 · View history | $12.38M 5,157,290 shares | 0.27% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 08 | Sio Capital Management, LLC CIK 1482416 · View history | $9.83M 4,095,764 shares | 3.94% | +697.98K(+20.50%)Added | SEC filing ↗ Aug 13, 2025 | ▾ |
| 09 | Tetragon Partners GP Ltd CIK 1515070 · View history | $6.74M 2,810,000 shares | 1.22% | +160.00K(+6.00%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 10 | Candriam S.C.A. CIK 1537014 · View history | $6.08M 2,534,230 shares | 0.04% | 0(0.00%)Unchanged | SEC filing ↗ Aug 8, 2025 | ▾ |
| 11 | MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history | $6.03M 2,514,134 shares | 0.01% | +2.34M(+1,334.20%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 12 | Logos Global Management LP CIK 1792126 · View history | $5.78M 2,410,000 shares | 0.77% | -1.59M(-39.80%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 13 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $5.48M 2,284,773 shares | 0.00% | +39.76K(+1.80%)Added | SEC filing ↗ Aug 8, 2025 | ▾ |
| 14 | AMERIPRISE FINANCIAL INC CIK 820027 · View history | $5.20M 2,166,178 shares | 0.00% | -1.82M(-45.60%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 15 | STATE STREET CORP CIK 93751 · View history | $4.75M 1,980,984 shares | 0.00% | -58.84K(-2.90%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
| 16 | SPHERA FUNDS MANAGEMENT LTD. CIK 1496201 · View history | $4.23M 1,764,387 shares | 1.11% | 0(0.00%)Unchanged | SEC filing ↗ Aug 14, 2025 | ▾ |
| 17 | GOLDMAN SACHS GROUP INC CIK 886982 · View history | $3.91M 1,630,649 shares | 0.00% | +789.07K(+93.80%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 18 | BANK OF AMERICA CORP /DE/ CIK 70858 · View history | $3.49M 1,452,795 shares | 0.00% | +414.07K(+39.90%)Added | SEC filing ↗ Aug 14, 2025 | ▾ |
| 19 | MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC CIK 922127 · View history | $2.59M 1,078,961 shares | 0.03% | +48.28K(+4.70%)Added | SEC filing ↗ Jul 29, 2025 | ▾ |
| 20 | Woodline Partners LP CIK 1784547 · View history | $2.53M 1,053,709 shares | 0.01% | -1.06M(-50.20%)Reduced | SEC filing ↗ Aug 14, 2025 | ▾ |
Showing 20 / 130 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 130 reporting institutions.
This page includes 20 of 130 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 130 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"03589W102","quarter":"2025Q2","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.