YMAB

Y-mAbs Therapeutics
YMAB

Overview Fund Activity
Delisted

YMAB was delisted on the 15th of September, 2025.

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100 hedge funds and large institutions have $866M invested in Y-mAbs Therapeutics in 2021 Q2 according to their latest regulatory filings, with 13 funds opening new positions, 45 increasing their positions, 22 reducing their positions, and 30 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
100
Holders Change
-17
Holders Change %
-14.53%
% of All Funds
1.75%
Holding in Top 10
2
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.03%
New
13
Increased
45
Reduced
22
Closed
30
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
Wellington Management Group
Wellington Management Group
Massachusetts
+$48.3M
2
BlackRock
BlackRock
New York
+$6.05M
3
SCM
Soleus Capital Management
Connecticut
+$4.88M
4
LOAMS
Lombard Odier Asset Management (Switzerland)
Switzerland
+$4.68M
5
AllianceBernstein
AllianceBernstein
Tennessee
+$3.96M

Top Sellers

1
Loomis, Sayles & Company
Loomis, Sayles & Company
Massachusetts
-$23.7M
2
CAM
Cormorant Asset Management
Massachusetts
-$14.5M
3
State Street
State Street
Massachusetts
-$10.8M
4
DCM
Driehaus Capital Management
Illinois
-$10.7M
5
Millennium Management
Millennium Management
New York
-$8.62M
Name Holding Trade Value Shares
Change 		Shares
Change %
Nisa Investment Advisors
126
Nisa Investment Advisors
Missouri
– -$41 -1,350 Closed
Bank of Montreal
127
Bank of Montreal
Ontario, Canada
– -$27K -945 Closed
US Bancorp
128
US Bancorp
Minnesota
– -$7K -243 Closed
Simplex Trading
129
Simplex Trading
Illinois
– -$5K -181 Closed
CAPTRUST Financial Advisors
130
CAPTRUST Financial Advisors
North Carolina
– -$1K -40 Closed
2 3 4 5
6