Annexon ANNX Institutional Ownership

NASDAQ ANNX

$4.23 +0.10 (+2.42%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

216 Institutions

Increased 111 51.4%

Unchanged 25 11.6%

Reduced 80 37.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

89.36%

▲+9.06 pp QoQ

Shares Held by Institutions

179.62Mn

of 201.00Mn outstanding

▲+16.86% QoQ

Shares Outstanding

201.00Mn

21.38Mn held outside 13F filers

Institutional Investors

216

filed 13F for Jun 2026

▼-1 vs prior quarter

Net Shares Added (QoQ)

+25.92Mn

accumulated since last quarter

Value of Holdings

$759.81Mn

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

Quarter ending 30 Jun, 2026

Annexon, Inc. (NASDAQ:ANNX) has 216 institutional investors with active 13F positions as of June 2026.

They owned 89.4% of outstanding stock in June 2026, up from 80.3% the prior quarter.
They increased total shares held in Annexon by 16.86% from the prior quarter, while the number of investors in ANNX increased 71.43% year over year.
Of these 216 funds, 111 grew their exposure to Annexon, 80 cut back, and 25 maintained positions.
Altogether, these fund groups held 179.62Mn shares in ANNX by June 2026, up by 25.92Mn shares quarter on quarter, and up 83.57Mn shares year over year.
FMR LLC is the top holder of Annexon as of June 30, 2026, with 19.52Mn shares representing 9.71% of outstanding stock.
The most significant purchases of ANNX for the quarter ending June 2026 came from FMR LLC (8.88Mn), Woodline Partners LP (4.59Mn), Goldman Sachs Group Inc (3.67Mn), MPM BioImpact LLC (3.54Mn), State Street Corp (2.91Mn).
The largest sales of ANNX for the quarter ending June 2026 came from Bank Of America Corp /De/ (3.65Mn), Redmile Group, LLC (2.68Mn), Nuveen, LLC (1.48Mn), Bellevue Group AG (1.06Mn), BALYASNY ASSET MANAGEMENT L.P. (1.06Mn).
Per Business Quant, the top 10 investors in ANNX for the quarter ending June 2026 include FMR LLC (19.52Mn), BlackRock, Inc. (13.54Mn), Redmile Group, LLC (11.87Mn), State Street Corp (9.82Mn), BVF INC/IL (8.7Mn), Woodline Partners LP (6.93Mn), VANGUARD CAPITAL MANAGEMENT LLC (6.87Mn), MAK CAPITAL ONE LLC (5.86Mn), Goldman Sachs Group Inc (5.83Mn), Siren, L.L.C. (4.46Mn).

Form 13F Holdings

216 Institutional Holders

Report period 30 Jun, 2026

Total shares held 179.62Mn

Of outstanding 89.36%

#	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 216 holders