Comparable stake leader
Redmile Group, LLC
SEC ownership of Annexon, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001528115.
Disclosed value leader
Redmile Group, LLC
Comparable rows
50/50
Latest evidence
28 May 2026
- Public ticker
- ANNX on Nasdaq
- Parsed ownership sources
- 13D/G, 13F, and 3/4/5
- Largest SEC-reported holder
- Redmile Group, LLC
- Latest 13D/G holder
- Redmile Group, LLC
- Latest parsed ownership date
- 28 May 2026
- Issuer CIK
- 0001528115
- Issuer location
- Brisbane, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Annexon, Inc. (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
50/50
Latest evidence
28 May 2026
13D/G
13F
3/4/5
Lead comparable stake: 9.9%
13D/G row: Redmile Group, LLC
Showing 1-8 of 50 holder rows.
Quick read
Redmile Group, LLC leads the comparable SEC ownership view at 9.9%.
50 of 50 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%
Muneer A. Satter
7.2%
FMR LLC
7.1%
BlackRock, Inc.
6.1%
BIOTECHNOLOGY VALUE FUND L P
5.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 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 |
| Muneer A. Satter |
3/4/5
13D/G
Director · Satter Muneer A
|
7.2%
from 13D/G
|
$55,950,944
10,397,134 shares
mixed-class rows
|
+$11,974,802 | 28 May 2026 |
| FMR LLC |
13F
13D/G
Company
|
7.1%
from 13D/G
|
$58,921,492
10,635,648 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.1%
from 13D/G
|
$60,599,340
10,938,509 shares
|
— | 31 Mar 2026 |
| BIOTECHNOLOGY VALUE FUND L P |
13D/G
BVF PARTNERS L P/IL
|
5.4%
|
$48,187,878
8,698,173 shares
|
$0 | 31 Mar 2026 |
| 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
|
$10,369,744
1,871,795 shares
|
— | 31 Mar 2026 |
| BVF INC/IL |
13F
Company
|
5.4%
|
$48,187,878
8,698,173 shares
|
— | 31 Mar 2026 |
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.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$12,026,226.
Buys
$12,347,642
Insiders: 3
Sells
$321,415
Insiders: 5
Net
+$12,026,226
Shares: +2,959,132
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 3,021,915
Shares: 62,783
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 637,497 | 0 | $3,460,219 | $0 | +$3,460,219 |
| 3-6 | 4,115 | 59,697 | $20,657 | $313,428 | -$292,770 |
| 6-9 | 2,367,958 | 0 | $8,838,043 | $0 | +$8,838,043 |
| 9-12 | 12,345 | 3,086 | $28,723 | $7,987 | +$20,735 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-17 of 17 reporting-owner rows connected to Annexon, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
17
Largest Forms 3/4/5 holder
Muneer A. Satter
Net 12M change
+$12,026,226
Latest report
28 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Muneer A. Satter | Director | $55,950,944 | +$11,974,802 | +27% | Filing P/S | 28 May 2026 |
| Bain Capital Life Sciences Investors, LLC | 10%+ Owner | $24,428,590 | Mixed | 25 May 2023 | ||
| Michael Overdorf | Evp & Chief Business Officer | $989,827 | -$57,491 | -5.5% | Filing P/S | 02 Mar 2026 |
| Dean Richard Artis | Evp & Chief Scientific Officer | $977,904 | -$58,983 | -5.7% | Filing P/S | 02 Mar 2026 |
| Jennifer Lew | Evp & Chief Financial Officer | $925,194 | -$73,163 | -7.3% | Filing P/S | 02 Mar 2026 |
| Ted Yednock | Evp & Chief Innovation Officer | $835,552 | -$73,196 | -8.1% | Filing P/S | 02 Mar 2026 |
| Jamie Dananberg | Chief Medical Officer | $671,050 | -$58,582 | -8% | Filing P/S | 02 Mar 2026 |
| William H. Carson | Director | $453,180 | +$234,569 | +107% | Filing P/S | 11 May 2026 |
| Jung Choi | Director | $138,270 | +$138,270 | +100% | Filing P/S | 01 Dec 2025 |
| Larry Mattheakis | EVP & Chief Scientific Officer | $77,728 | Mixed | 11 Jul 2022 | ||
| Sanjay Chandru Keswani | EVP & Chief Medical Officer | $56,528 | Mixed | 11 Feb 2022 | ||
| Bettina M. Cockroft | Director | Mixed | 05 Jun 2025 | |||
| Douglas Love | PRESIDENT AND CEO, Director | Mixed | 19 Feb 2026 | |||
| William A. Jones Jr. | Director | Mixed | 05 Jun 2025 | |||
| William D. Waddill | Director | Mixed | 05 Jun 2025 | |||
| Ricky Sun | Director | Mixed | 02 Jun 2021 | |||
| Thomas G. Wiggans | Director | Mixed | 05 Jun 2025 |
Recent insider transactions for Annexon, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Muneer A. Satter | ANNX | Common Stock | Purchase | 6.31% | $3,319,019 | $5.41 | 613,497 | 10,342,134 | 28 May 2026 | See footnote |
| William H. Carson | ANNX | Common Stock | Purchase | 11.4% | $46,240 | $5.78 | 8,000 | 78,405 | 11 May 2026 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 12.8% | $49,600 | $6.20 | 8,000 | 70,405 | 10 Apr 2026 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 14.7% | $45,360 | $5.67 | 8,000 | 62,405 | 10 Mar 2026 | Direct |
| Jamie Dananberg | ANNX | Common Stock | Sale | -4.5% | $31,603 | $5.43 | -5,820 | 123,582 | 02 Mar 2026 | Direct |
| Michael Overdorf | ANNX | Common Stock | Sale | -2.32% | $23,517 | $5.42 | -4,339 | 182,625 | 02 Mar 2026 | Direct |
| Ted Yednock | ANNX | Common Stock | Sale | -3.48% | $30,168 | $5.42 | -5,566 | 154,161 | 02 Mar 2026 | Direct |
| Dean Richard Artis | ANNX | Common Stock | Sale | -3.17% | $32,004 | $5.43 | -5,894 | 180,093 | 02 Mar 2026 | Direct |
| Jennifer Lew | ANNX | Common Stock | Sale | -3.16% | $30,162 | $5.42 | -5,565 | 170,700 | 02 Mar 2026 | Direct |
| Douglas Love | ANNX | Stock Option (Right to Buy) | Award | 1,250,000 | 1,250,000 | 19 Feb 2026 | Direct | |||
| Jamie Dananberg | ANNX | Common Stock | Award | 76.9% | 56,250 | 129,402 | 19 Feb 2026 | Direct | ||
| Jamie Dananberg | ANNX | Stock Option (Right to Buy) | Award | 225,000 | 225,000 | 19 Feb 2026 | Direct | |||
| Michael Overdorf | ANNX | Common Stock | Award | 50.2% | 62,500 | 186,964 | 19 Feb 2026 | Direct | ||
| Michael Overdorf | ANNX | Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 19 Feb 2026 | Direct | |||
| Dean Richard Artis | ANNX | Common Stock | Award | 50.6% | 62,500 | 185,987 | 19 Feb 2026 | Direct | ||
| Dean Richard Artis | ANNX | Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 19 Feb 2026 | Direct | |||
| Ted Yednock | ANNX | Common Stock | Award | 64.3% | 62,500 | 159,727 | 19 Feb 2026 | Direct | ||
| Ted Yednock | ANNX | Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 19 Feb 2026 | Direct | |||
| Jennifer Lew | ANNX | Common Stock | Award | 54.9% | 62,500 | 176,265 | 19 Feb 2026 | Direct | ||
| Jennifer Lew | ANNX | Stock Option (Right to Buy) | Award | 250,000 | 250,000 | 19 Feb 2026 | Direct | |||
| Jamie Dananberg | ANNX | Common Stock | Sale | -6.74% | $26,979 | $5.10 | -5,290 | 73,152 | 18 Feb 2026 | Direct |
| Jennifer Lew | ANNX | Common Stock | Sale | -6.46% | $40,119 | $5.11 | -7,851 | 113,765 | 18 Feb 2026 | Direct |
| Dean Richard Artis | ANNX | Common Stock | Sale | -4.11% | $26,979 | $5.10 | -5,290 | 123,487 | 18 Feb 2026 | Direct |
| Ted Yednock | ANNX | Common Stock | Sale | -7.48% | $40,149 | $5.11 | -7,857 | 97,227 | 18 Feb 2026 | Direct |
| Michael Overdorf | ANNX | Common Stock | Sale | -4.76% | $31,748 | $5.10 | -6,225 | 124,464 | 18 Feb 2026 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 8.18% | $20,657 | $5.02 | 4,115 | 54,405 | 30 Dec 2025 | Direct |
| Jung Choi | ANNX | Common Stock | Purchase | $138,270 | $4.19 | 33,000 | 33,000 | 01 Dec 2025 | By Trust | |
| William H. Carson | ANNX | Common Stock | Purchase | 8.91% | $18,394 | $4.47 | 4,115 | 50,290 | 01 Dec 2025 | Direct |
| Muneer A. Satter | ANNX | Common Stock | Purchase | 4.54% | $1,808,784 | $4.28 | 422,613 | 9,728,637 | 21 Nov 2025 | See footnote |
| Muneer A. Satter | ANNX | Common Stock | Purchase | 4.49% | $1,792,000 | $4.48 | 400,000 | 9,306,024 | 20 Nov 2025 | See footnote |
| Muneer A. Satter | ANNX | Common Stock | Purchase | 5.95% | $1,970,000 | $3.94 | 500,000 | 8,906,024 | 19 Nov 2025 | See footnote |
| Muneer A. Satter | ANNX | Common Stock | Purchase | 6.32% | $1,590,000 | $3.18 | 500,000 | 8,406,024 | 18 Nov 2025 | See footnote |
| Muneer A. Satter | ANNX | Common Stock | Purchase | 6.75% | $1,495,000 | $2.99 | 500,000 | 7,906,024 | 17 Nov 2025 | See footnote |
| William H. Carson | ANNX | Common Stock | Purchase | 9.78% | $13,045 | $3.17 | 4,115 | 46,175 | 30 Oct 2025 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 10.8% | $12,551 | $3.05 | 4,115 | 42,060 | 30 Sep 2025 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 12.2% | $8,600 | $2.09 | 4,115 | 37,945 | 02 Sep 2025 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 13.8% | $9,999 | $2.43 | 4,115 | 33,830 | 30 Jul 2025 | Direct |
| Ted Yednock | ANNX | Common Stock | Sale | -1.05% | $2,879 | $2.58 | -1,116 | 105,084 | 14 Jul 2025 | Direct |
| Jennifer Lew | ANNX | Common Stock | Sale | -0.91% | $2,882 | $2.58 | -1,117 | 121,616 | 14 Jul 2025 | Direct |
| Michael Overdorf | ANNX | Common Stock | Sale | -0.65% | $2,226 | $2.61 | -853 | 130,689 | 14 Jul 2025 | Direct |
| William H. Carson | ANNX | Common Stock | Purchase | 16.1% | $10,123 | $2.46 | 4,115 | 29,715 | 30 Jun 2025 | Direct |
* marks a reported price that did not pass the local price check.