Annexon ANNX Institutional Ownership

NASDAQ ANNX

$4.87 +0.03 (+0.62%)

As of: Sep 4, 2026 · 3:59 PM EDT

Institutions by Trading Activity

215 Institutions

Increased 111 51.6%

Unchanged 25 11.6%

Reduced 79 36.7%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

89.35%

▲+9.02 pp QoQ

Shares Held by Institutions

179.60Mn

of 201.00Mn outstanding

▲+16.86% QoQ

Shares Outstanding

201.00Mn

21.40Mn held outside 13F filers

Institutional Investors

215

filed 13F for Jun 2026

▼-2 vs prior quarter

Net Shares Added (QoQ)

+25.92Mn

accumulated since last quarter

Value of Holdings

$869.27Mn

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) appears in 215 institutional 13F filings for the quarter ending June 2026.

Their combined ownership stood at 89.4% of outstanding shares in June 2026, up from 80.3% in March 2026.
They increased total shares held in Annexon by 16.86% from the prior quarter, while the number of investors in ANNX increased 70.63% year over year.
Among the 215 funds, 111 bought more Annexon shares, 79 sold down, and 25 held their ground.
The aggregate institutional position in Annexon amounted to 179.6Mn shares as of June 2026, up by 25.92Mn shares quarter on quarter, and up 82.92Mn shares year over year.
FMR LLC leads ownership in ANNX with 19.52Mn shares as of June 30, 2026, equal to 9.71% of outstanding shares.
Top purchasers of ANNX stock for the quarter ending June 2026 included 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).
Leading sellers of Annexon shares for the quarter ending June 2026 were 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).
According to Business Quant data, leading holders of ANNX for June 2026 are 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 179.60Mn

Of outstanding 89.35%

#	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