Annexon, Inc.

ANNX

Exchange: Nasdaq
Industry: Pharmaceutical Preparations
SEC CIK: 0001528115

SEC filings (opens in a new tab)

In the last 90 days, Annexon, Inc. insiders filed 1 open-market purchase and 0 sales; 216 institutions reported holding it in 13F filings for Q2 2026, worth $1.02B in total; no superinvestor holds it.

Q1 2025 vs. Q4 2024

How the institutions holding Annexon, Inc. changed between Q4 2024 and Q1 2025.

All holders in Q1 2025 All holders in Q4 2024

13F holders of ANNX: Q4 2024 compared with Q1 2025
Measure	Q4 2024	Of which not filed for Q1 2025	Q1 2025	Change
Holders	153	2	148	−3
Shares	112.2M	10.1M	99.8M	−2.29M (−2.2%)
Value	$574.6M	$51.9M	$192.1M	−$330.5M (−63.2%)

2 institutions that held it in Q4 2024 haven't filed for Q1 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (25)

Institutions that held Annexon, Inc. at the end of Q1 2025 but not at the end of Q4 2024.

Institutions new to ANNX in Q1 2025
Institution	Shares	Value	% of portfolio
Sirios Capital Management L P	768,686	$1.48M	0.26%
Nuveen, LLC	347,032	$669.8K	0.00%
Syon Capital LLC	144,485	$278.9K	0.02%
Balyasny Asset Management LLC	96,752	$186.7K	0.00%
Ieq Capital, LLC	80,000	$154.4K	0.00%
HRT Financial LP	78,100	$150.0K	0.00%
Y-Intercept (Hong Kong) Ltd	65,918	$127.2K	0.01%
Brevan Howard Capital Management LP	62,074	$119.8K	0.00%
Jain Global LLC	61,276	$118.3K	0.00%
EntryPoint Capital, LLC	53,271	$102.8K	0.05%
Virtus Investment Advisers, Inc.	36,399	$70.3K	0.02%
Alpine Global Management, LLC	25,145	$48.5K	0.01%
CIBC World Markets Corp	21,667	$41.8K	0.00%
Virginia Retirement Systems Et Al	20,600	$39.8K	0.00%
Lido Advisors, LLC	20,000	$38.6K	0.00%
Quadrature Capital Ltd	17,732	$34.5K	0.00%
Quantinno Capital Management LP	17,770	$34.3K	0.00%
Axq Capital, LP	14,117	$27.2K	0.01%
LPL Financial LLC	12,926	$24.9K	0.00%
Catalyst Funds Management Pty Ltd	11,760	$22.7K	0.01%
Gsa Capital Partners LLP	11,425	$22.0K	0.00%
Dynamic Technology Lab Private Ltd	10,947	$21.0K	0.00%
Point72 Asia (Singapore) Pte. Ltd.	5,994	$11.6K	0.00%
Parkside Financial Bank & Trust	140	$273	0.00%
True Wealth Design, LLC	17	$33	0.00%

Sold out (28)

Institutions that held Annexon, Inc. at the end of Q4 2024 and filed for Q1 2025 without it.

Institutions that sold out of ANNX in Q1 2025
Institution	Shares, Q4 2024	Value, Q4 2024
Eventide Asset Management, LLC	1,017,928	$5.22M
Readystate Asset Management LP	774,860	$3.98M
Rafferty Asset Management, LLC	218,369	$1.12M
Artia Global Partners LP	172,226	$883.5K
Exome Asset Management LLC	144,830	$743.0K
Two Sigma Investments, LP	137,183	$703.7K
Advisor Group Holdings, Inc.	80,475	$412.8K
Prelude Capital Management, LLC	43,363	$222.5K
Profund Advisors LLC	42,273	$216.9K
Marshall Wace, LLP	38,845	$199.3K
Sherbrooke Park Advisers LLC	30,134	$154.6K
Simplex Trading, LLC	29,433	$150.0K
Two Sigma Advisers, LP	17,400	$89.3K
Virtus ETF Advisers LLC	15,763	$80.9K
E Fund Management Co., Ltd.	15,447	$79.2K
Creative Planning	14,673	$75.3K
Corton Capital Inc.	13,741	$70.5K
Omers Administration Corp	12,900	$66.2K
SEI Investments Co	10,319	$52.9K
Sandia Investment Management LP	10,000	$51.3K
Federated Hermes, Inc.	6,679	$34.3K
Russell Investments Group, Ltd.	988	$5.07K
Bryn Mawr Trust Co	403	$2.07K
Caitong International Asset Management Co., Ltd	211	$1.08K
Signaturefd, LLC	151	$775
SRS Capital Advisors, Inc.	133	$683
UMA Financial Services, Inc.	133	$683
Smartleaf Asset Management LLC	119	$610

Not filed for Q1 2025 yet (2)

Institutions that held Annexon, Inc. at the end of Q4 2024 and haven't filed a 13F for Q1 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ANNX in Q4 2024 that haven't filed for Q1 2025
Institution	Shares, Q4 2024	Value, Q4 2024
Satter Management Co., L.P.	7,406,024	$38.0M
Nuveen Asset Management, LLC	2,720,485	$14.0M