Annexon, Inc.

ANNXNASDAQ

$4.01-0.02 (-0.50% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Annexon, Inc. price and activity chart data

Showing the 1Y range: Oct 7, 2025 to Oct 7, 2026. Price (+30.6%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
FMR LLC	13.07%	$111M	0.00%	Not reported
BlackRock, Inc.	9.07%	$77.3M	0.00%	Not reported
Redmile Group, LLC	7.95%	$67.8M	4.55%	Not reported
State Street Corp	6.58%	$56.1M	0.00%	Not reported
BVF Inc	5.82%	$49.7M	1.27%	Not reported
Woodline Partners LP	4.64%	$39.5M	0.12%	Not reported
Vanguard Capital Management LLC	4.60%	$39.2M	0.00%	Not reported
Mak Capital One LLC	3.92%	$33.5M	4.69%	Add 24.09%
Goldman Sachs Group Inc	3.90%	$33.3M	0.00%	Not reported
Siren, L.L.C.	2.99%	$25.5M	0.52%	Add 12.63%
Bain Capital Life Sciences Investors, LLC	2.97%	$25.3M	1.51%	Reduce 14.87%
Bellevue Group AG	2.75%	$23.4M	0.49%	Reduce 20.50%
Geode Capital Management, LLC	2.70%	$23.1M	0.00%	Not reported
MPM Bioimpact LLC	2.37%	$20.2M	1.23%	New Not reported
Ameriprise Financial Inc	2.35%	$20M	0.00%	Not reported
Adage Capital Partners GP, L.L.C.	2.34%	$20M	0.03%	Reduce 18.60%
Great Point Partners LLC	2.34%	$20M	3.78%	Add 40.00%
Morgan Stanley	2.11%	$18M	0.00%	Not reported
Palo Alto Investors LP	1.97%	$16.8M	2.33%	Not reported
Balyasny Asset Management L.P.	1.90%	$16.2M	0.02%	Not reported
Nuveen, LLC	1.85%	$15.8M	0.00%	Not reported
Qube Research & Technologies Ltd	1.84%	$15.7M	0.01%	Not reported
Vanguard Portfolio Management LLC	1.50%	$12.8M	0.00%	Not reported
Opaleye Management Inc.	1.15%	$9.79M	0.89%	Reduce 26.47%
Logos Global Management LP	1.00%	$8.57M	0.37%	New Not reported
Dimensional Fund Advisors LP	1.00%	$8.55M	0.00%	Not reported
Point72 Asset Management, L.P.	0.93%	$7.9M	0.01%	Not reported
Northern Trust Corp	0.91%	$7.72M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.84%	$7.18M	0.00%	Not reported
Tetragon Partners GP Ltd	0.83%	$7.09M	1.12%	Reduce 3.87%
Millennium Management LLC	0.79%	$6.77M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.74%	$6.31M	0.00%	Not reported
Massachusetts Financial Services Co	0.69%	$5.92M	0.00%	Add 14.83%
JPMorgan Chase & Co	0.67%	$5.59M	0.00%	Not reported
Wells Fargo & Company	0.65%	$5.58M	0.00%	Not reported
Panagora Asset Management Inc	0.65%	$5.53M	0.02%	Not reported
Kennedy Capital Management LLC	0.60%	$5.13M	0.09%	Reduce 1.53%
Ishara Investments LP	0.55%	$4.68M	3.44%	Add 370.59%
Ensign Peak Advisors, Inc	0.54%	$4.57M	0.01%	Add 28.06%
Arrowstreet Capital, Limited Partnership	0.49%	$4.21M	0.00%	Not reported
Y-Intercept (Hong Kong) Ltd	0.49%	$4.19M	0.08%	Not reported
Russell Investments Group, Ltd.	0.47%	$4.03M	0.00%	Not reported
AQR Capital Management LLC	0.46%	$3.95M	0.00%	Not reported
Parkman Healthcare Partners LLC	0.43%	$3.66M	0.37%	Reduce 4.89%
Acadian Asset Management LLC	0.42%	$3.59M	0.00%	Not reported
UBS Group AG	0.42%	$3.56M	0.00%	Not reported
Deutsche Bank Ag\	0.41%	$3.52M	0.00%	Not reported
Bank of America Corp	0.41%	$3.51M	0.00%	Not reported
Citadel Advisors LLC	0.40%	$3.41M	0.00%	Not reported
Deerfield Management Company, L.P.	0.39%	$3.33M	0.03%	Not reported

50 of 204 holders

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