RNA

Atrium Therapeutics

161 hedge funds and large institutions have $198M invested in Atrium Therapeutics in 2026 Q1 according to their latest regulatory filings, with 161 funds opening new positions, increasing their positions, reducing their positions, and closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
161
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
2
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$968K
Puts
$15.6M
Net Calls
Net Calls Change

Top Buyers

1 +$21.8M
2 +$16.9M
3 +$12.1M
4
TAL
TIG Advisors LLC
New York
+$8.54M
5
PCM
Pentwater Capital Management
Florida
+$8.47M

Top Sellers

No sellers this quarter
Name Holding Trade Value Shares
Change
Change in
Stake
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
76
Healthcare of Ontario Pension Plan (HOOPP) Trust Fund
Ontario, Canada
$275K
FI
77
Fractal Investments
Connecticut
$267K
Jane Street
78
Jane Street
New York
$267K
VI
79
Vestcor Inc
New Brunswick, Canada
$234K
Grantham, Mayo, Van Otterloo & Co (GMO)
80
Grantham, Mayo, Van Otterloo & Co (GMO)
Massachusetts
$206K
RhumbLine Advisers
81
RhumbLine Advisers
Massachusetts
$200K
AA
82
AlphaCentric Advisors
Puerto Rico
$178K
SPS
83
Susquehanna Portfolio Strategies
Pennsylvania
$175K
AllianceBernstein
84
AllianceBernstein
Tennessee
$173K
Public Sector Pension Investment Board (PSP Investments)
85
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$172K
QCM
86
Quantinno Capital Management
New York
$167K
JP Morgan Chase
87
JP Morgan Chase
New York
$163K
Wells Fargo
88
Wells Fargo
California
$153K
Susquehanna International Group
89
Susquehanna International Group
Pennsylvania
$152K
MF
90
Magnetar Financial
Illinois
$141K
Invesco
91
Invesco
Georgia
$136K
Deutsche Bank
92
Deutsche Bank
Germany
$134K
Mirae Asset Global ETFs Holdings
93
Mirae Asset Global ETFs Holdings
Hong Kong
$127K
MIM
94
MetLife Investment Management
New Jersey
$118K
BNP Paribas Financial Markets
95
BNP Paribas Financial Markets
France
$111K
CC
96
Centiva Capital
New York
$78.8K
Legal & General Group
97
Legal & General Group
United Kingdom
$75.6K
VGA
98
Vanguard Global Advisers
Pennsylvania
$74.7K
Russell Investments Group
99
Russell Investments Group
United Kingdom
$51.3K
Group One Trading
100
Group One Trading
Illinois
$49.2K