Security key
03589W102
Annexon, Inc. - Common Stock, par value $0.001 per share (ANNX)
CUSIP: 03589W102
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 136,923,781
- Total 13F value
- $687,297,160
- Share change
- +35,062,963
- Put/Call ratio
- 62%
- SEC-reported price per share
- $5.02
- Number of holders
- 169
- Value change
- +$183,807,666
- Number of buys
- 111
- Number of sells
- 45
- 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
Q4 2025
Institutions
169
Top holders
10
ANNX full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 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
Redmile Group, LLC
Disclosed value leader
Redmile Group, LLC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
13F
3/4/5
Lead comparable stake: 9.9%
13D/G row: Redmile Group, LLC
Showing 1-6 of 15 holder rows.
Quick read
Redmile Group, LLC leads the comparable SEC ownership view at 9.9%.
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 Redmile Group, LLC's linked filing trail.
Comparable ownership
Top 5
Redmile Group, LLC
9.9%
Satter Muneer A.
7.2%
FMR LLC
7.1%
BlackRock, Inc.
6.1%
Bain Capital Life Sciences Fund, ...
4.9%
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 |
|---|---|---|---|---|---|
| Redmile Group, LLC |
13D/G
13F
Company
|
9.9%
|
$85,778,935
15,427,866 shares
|
$0 | 31 Dec 2025 |
| Satter Muneer A. |
13D/G
|
7.2%
|
$36,032,262
10,444,134 shares
|
$0 | 19 Nov 2025 |
| FMR LLC |
13D/G
13F
Company
|
7.1%
|
$51,316,801
10,222,470 shares
|
-$4,310,639 | 31 Dec 2025 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.1%
|
$44,521,150
8,868,755 shares
|
$0 | 31 Dec 2025 |
| 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. |
13F
13D/G
Company
|
0.1%
from 13D/G
|
$274,650
90,049 shares
|
— | 30 Sep 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 Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
169
Shares
136,923,781
Rows available
169
| 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 Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
143
Q4 2025 holders
169
Holder diff
26
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend