ANNX Annexon, Inc.

NASDAQ
$3.94

Annexon, Inc. (ANNX) Institutional Ownership

What the institutions did with ANNX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
240
filed both this quarter and last
Managers holding
212
-1 on the quarter
Buyers
107
27 opened new
Sellers
108
28 sold out entirely
Buyer share
49.8%
of managers who traded it
Breadth
-0.5
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

Sign in or subscribe

Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
FMR LLC 19.5M 10.9%
BlackRock, Inc. 13.5M 7.6%
Redmile Group, LLC 11.9M 6.7%
STATE STREET CORP 9.8M 5.5%
BVF INC/IL 8.7M 4.9%
Woodline Partners LP 6.9M 3.9%
VANGUARD CAPITAL MANAGEMENT LLC 6.9M 3.9%
MAK CAPITAL ONE LLC 5.9M 3.3%
GOLDMAN SACHS GROUP INC 5.8M 3.3%
Siren, L.L.C. 4.5M 2.5%
Bain Capital Life Sciences Investors, LLC 4.4M 2.5%
Bellevue Group AG 4.1M 2.3%
GEODE CAPITAL MANAGEMENT, LLC 4.0M 2.3%
MPM BIOIMPACT LLC 3.5M 2.0%
AMERIPRISE FINANCIAL INC 3.5M 2.0%
ADAGE CAPITAL PARTNERS GP, L.L.C. 3.5M 2.0%
GREAT POINT PARTNERS LLC 3.5M 2.0%
MORGAN STANLEY 3.1M 1.8%
Palo Alto Investors LP 2.9M 1.7%
Balyasny Asset Management L.P. 2.8M 1.6%
Nuveen, LLC 2.8M 1.6%
Qube Research & Technologies Ltd 2.7M 1.5%
VANGUARD PORTFOLIO MANAGEMENT LLC 2.2M 1.3%
Opaleye Management Inc. 1.7M 1.0%
Logos Global Management LP 1.5M 0.8%

Largest changes

Manager Action Previous Current Change
FMR LLC Increased 10.6M 19.5M +8.9M
Woodline Partners LP Increased 2.3M 6.9M +4.6M
GOLDMAN SACHS GROUP INC Increased 2.2M 5.8M +3.7M
BANK OF AMERICA CORP /DE/ Reduced 4.3M 614.2K -3.6M
MPM BIOIMPACT LLC New 0 3.5M +3.5M
STATE STREET CORP Increased 6.9M 9.8M +2.9M
Redmile Group, LLC Reduced 14.5M 11.9M -2.7M
BlackRock, Inc. Increased 10.9M 13.5M +2.6M
Logos Global Management LP New 0 1.5M +1.5M
Nuveen, LLC Reduced 4.2M 2.8M -1.5M
Candriam S.C.A. New 0 1.2M +1.2M
MAK CAPITAL ONE LLC Increased 4.7M 5.9M +1.1M
Bellevue Group AG Reduced 5.2M 4.1M -1.1M
Balyasny Asset Management L.P. Reduced 3.9M 2.8M -1.1M
GREAT POINT PARTNERS LLC Increased 2.5M 3.5M +1.0M
PANAGORA ASSET MANAGEMENT INC New 0 967.9K +967.9K
VANGUARD CAPITAL MANAGEMENT LLC Increased 6.0M 6.9M +914.4K
ADAGE CAPITAL PARTNERS GP, L.L.C. Reduced 4.3M 3.5M -800.0K
Bain Capital Life Sciences Investors, LLC Reduced 5.2M 4.4M -774.9K
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 1.5M 2.2M +763.7K
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP New 0 737.9K +737.9K
JPMORGAN CHASE & CO Increased 323.9K 1.0M +680.4K
GEODE CAPITAL MANAGEMENT, LLC Increased 3.4M 4.0M +659.4K
MARSHALL WACE, LLP Reduced 861.5K 210.6K -650.9K
Ishara Investments LP Increased 174.3K 820.0K +645.8K
UBS Group AG Reduced 1.2M 623.1K -622.8K
Longaeva Partners L.P. Sold Out 620.4K 0 -620.4K
Opaleye Management Inc. Reduced 2.3M 1.7M -617.3K
Y-Intercept (Hong Kong) Ltd Reduced 1.3M 734.6K -585.3K
DIMENSIONAL FUND ADVISORS LP Increased 924.1K 1.5M +573.7K
Siren, L.L.C. Increased 4.0M 4.5M +500.0K
SILVERARC CAPITAL MANAGEMENT, LLC Sold Out 496.5K 0 -496.5K
Point72 Asset Management, L.P. Reduced 1.9M 1.4M -489.1K
D. E. Shaw & Co., Inc. Reduced 702.8K 265.3K -437.5K
Invesco Ltd. Reduced 763.0K 330.7K -432.3K
MOORE CAPITAL MANAGEMENT, LP New 0 425.3K +425.3K
Schonfeld Strategic Advisors LLC Increased 123.3K 533.6K +410.3K
MORGAN STANLEY Increased 2.7M 3.1M +408.5K
Qube Research & Technologies Ltd Reduced 3.1M 2.7M -364.4K
PRICE T ROWE ASSOCIATES INC /MD/ Reduced 428.7K 129.2K -299.5K
Jump Financial, LLC New 0 297.8K +297.8K
WELLS FARGO & COMPANY/MN Increased 698.7K 978.1K +279.3K
NORTHERN TRUST CORP Increased 1.1M 1.4M +265.1K
STATE OF WISCONSIN INVESTMENT BOARD Increased 49.7K 286.4K +236.6K
VANGUARD FIDUCIARY TRUST CO Increased 888.6K 1.1M +216.9K
BNP PARIBAS FINANCIAL MARKETS Reduced 255.4K 39.3K -216.1K
VOLORIDGE INVESTMENT MANAGEMENT, LLC Reduced 462.1K 250.0K -212.0K
CITIGROUP INC Increased 30.8K 236.0K +205.2K
Rosalind Advisors, Inc. Sold Out 200.0K 0 -200.0K
DAFNA Capital Management LLC Increased 117.8K 297.8K +180.0K
Ensign Peak Advisors, Inc Increased 625.1K 800.5K +175.4K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC Increased 1.1M 1.3M +155.4K
ALGERT GLOBAL LLC Sold Out 154.8K 0 -154.8K
Ikarian Capital, LLC Reduced 580.2K 430.2K -150.0K
OSAIC HOLDINGS, INC. Increased 1.3K 147.6K +146.4K
Engineers Gate Manager LP Increased 174.1K 319.1K +144.9K
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Increased 903.4K 1.0M +134.0K
ACADIAN ASSET MANAGEMENT LLC Reduced 758.2K 629.1K -129.1K
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Increased 7.2K 134.3K +127.1K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Reduced 158.6K 39.4K -119.2K

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.