Annexon ANNX Institutional Ownership

NASDAQ ANNX

$3.86 +0.03 (+0.78%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

215 Institutions

Increased 110 51.2%

Unchanged 25 11.6%

Reduced 80 37.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

88.74%

▲+8.43 pp QoQ

Shares Held by Institutions

178.37Mn

of 201.00Mn outstanding

▲+14.37% QoQ

Shares Outstanding

201.00Mn

22.64Mn held outside 13F filers

Institutional Investors

215

filed 13F for Jun 2026

▼-2 vs prior quarter

Net Shares Added (QoQ)

+22.42Mn

accumulated since last quarter

Value of Holdings

$683.14Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Annexon, Inc. (NASDAQ:ANNX) was held by 215 institutional investors that filed 13F reports for the quarter ended June 30, 2026.

These investors held 88.74% of Annexon's outstanding shares at the end of Q2 2026, up from 80.30% in Q1 2026.
Total shares held in Annexon rose 14.37% versus Q1 2026, while the number of holders rose 72.00% versus Q2 2025.
Of these 215 holders, 110 added to their positions, 80 reduced their stakes and 25 left their positions unchanged.
The aggregate institutional position in Annexon was 178.37Mn shares at the end of Q2 2026, up 22.42Mn from the prior quarter and up 82.32Mn from a year earlier.
FMR LLC led 13F holders of ANNX with 19.52Mn shares as of June 30, 2026, or 9.71% of shares outstanding.
The largest position increases in ANNX for Q2 2026 were by FMR LLC (+8.88Mn shares), Woodline Partners LP (+4.59Mn shares), Goldman Sachs Group Inc (+3.67Mn shares), State Street Corp (+2.91Mn shares) and BlackRock, Inc. (+2.6Mn shares).
Among holders that kept a stake in Annexon, the biggest sellers in Q2 2026 were Bank of America Corp (-3.65Mn shares), Redmile Group, LLC (-2.68Mn shares), Nuveen, LLC (-1.48Mn shares), Bellevue Group AG (-1.06Mn shares) and Balyasny Asset Management L.P. (-1.06Mn shares).
According to Business Quant data, the leading holders of ANNX for Q2 2026 were FMR LLC (19.52Mn shares), BlackRock, Inc. (13.54Mn shares), Redmile Group, LLC (11.87Mn shares), State Street Corp (9.82Mn shares), BVF Inc (8.7Mn shares), Woodline Partners LP (6.93Mn shares), Vanguard Capital Management LLC (6.87Mn shares), Mak Capital One LLC (5.86Mn shares), Goldman Sachs Group Inc (5.83Mn shares) and Siren, L.L.C. (4.46Mn shares).

Form 13F Holdings

215 Institutional Holders

Report period 30 Jun, 2026

Total shares held 178.37Mn

Of outstanding 88.74%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	FMR LLC	0000315066	19,518,496	9.71%	▲8,882,848	+83.52%	$111.45Mn
2	BlackRock, Inc.	0002012383	13,539,744	6.74%	▲2,601,235	+23.78%	$77.31Mn
3	Redmile Group, LLC	0001425738	11,869,877	5.91%	▼2,679,891	-18.42%	$67.78Mn
4	State Street Corp	0000093751	9,824,321	4.89%	▲2,905,066	+41.99%	$56.10Mn
5	BVF INC/IL	0001056807	8,698,173	4.33%	0	0.00%	$49.67Mn
6	Woodline Partners LP	0001784547	6,925,067	3.45%	▲4,587,930	+196.31%	$39.54Mn
7	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	6,871,015	3.42%	▲914,426	+15.35%	$39.23Mn
8	MAK CAPITAL ONE LLC	0001385702	5,862,180	2.92%	▲1,138,137	+24.09%	$33.47Mn
9	Goldman Sachs Group Inc	0000886982	5,825,579	2.90%	▲3,672,699	+170.59%	$33.26Mn
10	Siren, L.L.C.	0002005245	4,458,646	2.22%	▲500,000	+12.63%	$25.46Mn
11	Bain Capital Life Sciences Investors, LLC	0001703031	4,437,731	2.21%	▼774,943	-14.87%	$25.34Mn
12	Bellevue Group AG	0001674546	4,100,016	2.04%	▼1,057,274	-20.50%	$23.41Mn
13	GEODE CAPITAL MANAGEMENT, LLC	0001214717	4,037,193	2.01%	▲659,370	+19.52%	$23.06Mn
14	MPM BioImpact LLC	0001687078	3,544,354	1.76%	▲3,544,354	0.00%	$20.24Mn
15	Ameriprise Financial Inc	0000820027	3,509,623	1.75%	▲60,502	+1.75%	$20.04Mn
16	GREAT POINT PARTNERS LLC	0001281446	3,500,000	1.74%	▲1,000,000	+40.00%	$19.99Mn
16	ADAGE CAPITAL PARTNERS GP, L.L.C.	0001165408	3,500,000	1.74%	▼800,000	-18.60%	$19.99Mn
17	Morgan Stanley	0000895421	3,144,453	1.56%	▲408,483	+14.93%	$17.95Mn
18	Palo Alto Investors LP	0001306923	2,948,090	1.47%	0	0.00%	$16.83Mn
19	BALYASNY ASSET MANAGEMENT L.P.	0001218710	2,830,976	1.41%	▼1,055,933	-27.17%	$16.16Mn

Showing 1 to 20 of 215 holders