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Annexon, Inc. (ANNX) institutional ownership

Latest close $5.57 Jul 20, 2026
Market cap$290M 52-week range SectorHealthcare
Funds holding · Q1 2026
209
reported ANNX position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Net bought $107M
145 buyers · 64 sellers

Annexon, Inc. (ANNX) price and institutional activity

Dates

Q1 2026

$205M bought by 145 investors
Redmile Group, LLC$25MSiren, L.L.C.$22M +143 more
$98M sold by 64 investors
Longaeva Partners L.P.-$14MWoodline Partners LP-$9.4M +62 more
Bought Sold Totals per quarter; hover a bar for the names.

Annexon, Inc. (ANNX) institutional activity · 209

Investor Type Est. change Change Δ Own Date
Redmile Group, LLC · Added +$25M
Change +4.5M Date Q1 2026
Redmile Group, LLC Added· Q1 2026 +$25M +4.5M Q1 2026
Siren, L.L.C. · New +$22M
Change +4.0M Date Q1 2026
Siren, L.L.C. New· Q1 2026 +$22M +4.0M Q1 2026
Bank of America Corp · Added +$15M
Change +2.7M Date Q1 2026
Bank of America Corp Added· Q1 2026 +$15M +2.7M Q1 2026
Great Point Partners LLC · New +$14M
Change +2.5M Date Q1 2026
Great Point Partners LLC New· Q1 2026 +$14M +2.5M Q1 2026
Longaeva Partners L.P. · Reduced −$14M
Change −2.5M Date Q1 2026
Longaeva Partners L.P. Reduced· Q1 2026 −$14M −2.5M Q1 2026
State Street · Added +$13M
Change +2.3M Date Q1 2026
State Street Added· Q1 2026 +$13M +2.3M Q1 2026
BlackRock · Added +$11M
Change +2.0M Date Q1 2026
BlackRock Added· Q1 2026 +$11M +2.0M Q1 2026
Mak Capital One LLC · Added +$9.9M
Change +1.8M Date Q1 2026
Mak Capital One LLC Added· Q1 2026 +$9.9M +1.8M Q1 2026
Woodline Partners LP · Reduced −$9.4M
Change −1.7M Date Q1 2026
Woodline Partners LP Reduced· Q1 2026 −$9.4M −1.7M Q1 2026
Millennium Management LLC · Reduced −$9.0M
Change −1.6M Date Q1 2026
Millennium Management LLC Reduced· Q1 2026 −$9.0M −1.6M Q1 2026
Point72 Asset Management, L.P. · Added +$8.4M
Change +1.5M Δ Own +404.3% Date Q1 2026
Point72 Asset Management, L.P. Added· Q1 2026 +$8.4M +1.5M +404.3% Q1 2026
Nuveen, LLC · Added +$7.5M
Change +1.3M Date Q1 2026
Nuveen, LLC Added· Q1 2026 +$7.5M +1.3M Q1 2026
Y-Intercept (hong Kong) Ltd · New +$7.4M
Change +1.3M Date Q1 2026
Y-Intercept (hong Kong) Ltd New· Q1 2026 +$7.4M +1.3M Q1 2026
Sphera Funds Management Ltd. · Exited −$7.4M
Change −1.3M Δ Own −100.0% Date Q1 2026
Sphera Funds Management Ltd. Exited· Q1 2026 −$7.4M −1.3M −100.0% Q1 2026
Adage Capital Partners Gp, L.L.C. · Reduced −$6.8M
Change −1.2M Date Q1 2026
Adage Capital Partners Gp, L.L.C. Reduced· Q1 2026 −$6.8M −1.2M Q1 2026
Data through Q1 2026 · filed Jun 2, 2026
15 of 209

Famous investor activity in Annexon, Inc. (ANNX)

Annexon, Inc. (ANNX) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Waddill William D. · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Waddill William D. Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Satter Muneer A. · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Satter Muneer A. Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Jones William A. Jr · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Jones William A. Jr Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Cockroft Bettina M. · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Cockroft Bettina M. Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Choi Jung · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Choi Jung Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Carson William H. · Director Grant (A) 65K
Owned 65K Trade date Jun 11, 2026 Filed date Jun 15, 2026
Carson William H. Director Grant (A) 65K 65K Jun 11, 2026 Jun 15, 2026
Yednock Ted · Officer 2 operations 0
Price $1.85 Owned 0 Trade date Jun 11, 2026 Filed date Jun 15, 2026
Yednock Ted Officer 2 operations $1.85 0 0 Jun 11, 2026 Jun 15, 2026
Satter Muneer A. · Director Buy +$3.3M
Price $5.41 Qty +613K Owned 10.3M Trade date May 28, 2026 Filed date May 29, 2026
Satter Muneer A. Director Buy $5.41 +613K +$3.3M 10.3M May 28, 2026 May 29, 2026
Carson William H. · Director Buy +$46K
Price $5.78 Qty +8K Owned 78K Trade date May 11, 2026 Filed date May 13, 2026
Carson William H. Director Buy $5.78 +8K +$46K 78K May 11, 2026 May 13, 2026
Carson William H. · Director Buy +$50K
Price $6.20 Qty +8K Owned 70K Trade date Apr 10, 2026 Filed date Apr 14, 2026
Carson William H. Director Buy $6.20 +8K +$50K 70K Apr 10, 2026 Apr 14, 2026
Carson William H. · Director Buy +$45K
Price $5.67 Qty +8K Owned 62K Trade date Mar 10, 2026 Filed date Mar 12, 2026
Carson William H. Director Buy $5.67 +8K +$45K 62K Mar 10, 2026 Mar 12, 2026
Dananberg Jamie · Officer Sell −$32K
Price $5.43 Qty −6K Owned 124K Trade date Mar 2, 2026 Filed date Mar 4, 2026
Dananberg Jamie Officer Sell $5.43 −6K −$32K 124K Mar 2, 2026 Mar 4, 2026
Overdorf Michael · Officer Sell −$24K
Price $5.42 Qty −4K Owned 183K Trade date Mar 2, 2026 Filed date Mar 4, 2026
Overdorf Michael Officer Sell $5.42 −4K −$24K 183K Mar 2, 2026 Mar 4, 2026
Yednock Ted · Officer Sell −$30K
Price $5.42 Qty −6K Owned 154K Trade date Mar 2, 2026 Filed date Mar 4, 2026
Yednock Ted Officer Sell $5.42 −6K −$30K 154K Mar 2, 2026 Mar 4, 2026
Artis Dean Richard · Officer Sell −$32K
Price $5.43 Qty −6K Owned 180K Trade date Mar 2, 2026 Filed date Mar 4, 2026
Artis Dean Richard Officer Sell $5.43 −6K −$32K 180K Mar 2, 2026 Mar 4, 2026
15 of 39
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Annexon, Inc. (ANNX) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
FMR LLC 15.7M
% of shares outstanding 14.3% Filing date Aug 6, 2025
FMR LLC 15.7M 14.3% Aug 6, 2025
FMR LLC 19.5M
% of shares outstanding 11.9% Filing date Jul 8, 2026
FMR LLC 19.5M 11.9% Jul 8, 2026
Redmile Group, LLC 17.9M
% of shares outstanding 9.9% Filing date Jul 8, 2026
Redmile Group, LLC 17.9M 9.9% Jul 8, 2026
Blackrock, Inc. 7.6M
% of shares outstanding 7.2% Filing date Nov 8, 2024
Blackrock, Inc. 7.6M 7.2% Nov 8, 2024
Adage Capital Partners Gp, L.L.C. 5.6M
% of shares outstanding 7.2% Filing date Feb 7, 2024
Adage Capital Partners Gp, L.L.C. 5.6M 7.2% Feb 7, 2024
Point72 Asset Management, L.P. 4.9M
% of shares outstanding 6.2% Filing date Feb 12, 2024
Point72 Asset Management, L.P. 4.9M 6.2% Feb 12, 2024
Vanguard Group Inc 5.8M
% of shares outstanding 5.3% Filing date Oct 30, 2025
Vanguard Group Inc 5.8M 5.3% Oct 30, 2025
Bb Biotech AG 5.2M
% of shares outstanding 4.9% Filing date Nov 14, 2024
Bb Biotech AG 5.2M 4.9% Nov 14, 2024
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Annexon, Inc. (ANNX) ownership FAQ

Who owns ANNX?

209 reporting institutions disclosed ANNX position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.