Security key
03589W102
Annexon, Inc. - Common Stock, par value $0.001 per share (ANNX)
CUSIP: 03589W102
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 101,380,733
- Total 13F value
- $309,219,194
- Share change
- +1,923,451
- Put/Call ratio
- 37%
- SEC-reported price per share
- $3.05
- Number of holders
- 143
- Value change
- +$11,142,271
- Number of buys
- 81
- Number of sells
- 52
- Shares outstanding
- 161,077,278
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
143
Top holders
10
ANNX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
Annexon, Inc. SEC filings
Annexon, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 03589W102
Recent filing periods:
Ownership snapshot
Top reported holders of ANNX - Annexon, Inc. - Common Stock, par value $0.001 per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Bain Capital Life Science...
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Jun 2025
13D/G
13F
3/4/5
Lead comparable stake: 4.9%
13D/G row: Bain Capital Life Sciences Fund, L.P.
Showing 1-6 of 15 holder rows.
Quick read
Bain Capital Life Sciences Fund, L.P. leads the comparable SEC ownership view at 4.9%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Bain Capital Life Sciences Fund, L.P.'s linked filing trail.
Comparable ownership
Top 5
Bain Capital Life Sciences Fund, ...
4.9%
Point72 Asset Management, L.P.
0.1%
FMR LLC
9.7%
BlackRock, Inc.
4.9%
BVF INC/IL
4.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Fund, L.P. |
13D/G
BCLS I Investco, LP
|
4.9%
|
$9,973,231
5,249,069 shares
|
$0 | 31 Dec 2024 |
| Point72 Asset Management, L.P. |
13D/G
|
0.1%
|
$181,317
95,430 shares
|
$0 | 31 Mar 2025 |
| FMR LLC |
13F
Company
|
9.7%
|
$37,668,544
15,695,226 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
4.9%
|
$19,109,683
7,962,368 shares
|
— | 30 Jun 2025 |
| BVF INC/IL |
13F
Company
|
4.3%
|
$16,800,000
7,000,000 shares
|
— | 30 Jun 2025 |
| Redmile Group, LLC |
13F
Company
|
3.9%
|
$15,121,546
6,300,644 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
143
Shares
101,380,733
Rows available
143
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
127
Q3 2025 holders
143
Holder diff
16
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend