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YMAB

Y-mAbs Therapeutics
YMAB

Delisted

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

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109 hedge funds and large institutions have $920M invested in Y-mAbs Therapeutics in 2020 Q2 according to their latest regulatory filings, with 33 funds opening new positions, 40 increasing their positions, 29 reducing their positions, and 4 closing their positions.

New
Increased
Maintained
Reduced
Closed

725% more first-time investments, than exits

New positions opened: 33 | Existing positions closed: 4

76% more capital invested

Capital invested by funds: $523M → $920M (+$397M)

38% more repeat investments, than reductions

Existing positions increased: 40 | Existing positions reduced: 29

36% more funds holding

Funds holding: 80 → 109 (+29)

33% more funds holding in top 10

Funds holding in top 10: 3 → 4 (+1)

3.04% more ownership

Funds ownership: 50.49% → 53.53% (+3%)

Holders
109
Holders Change
+29
Holders Change %
+36.25%
% of All Funds
2.23%
Holding in Top 10
4
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+33.33%
% of All Funds
0.08%
New
33
Increased
40
Reduced
29
Closed
4
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
FLAM
First Light Asset Management
Minnesota
+$23M
2
BlackRock
BlackRock
New York
+$12.5M
3
State Street
State Street
Massachusetts
+$6.32M
4
Vanguard Group
Vanguard Group
Pennsylvania
+$5.98M
5
PC
Polar Capital
United Kingdom
+$4.73M

Top Sellers

Rank Fund Capital Flow
1
Wellington Management Group
Wellington Management Group
Massachusetts
-$15.7M
2
PA
Perceptive Advisors
New York
-$6.32M
3
CAM
Cormorant Asset Management
Massachusetts
-$5.96M
4
DCM
Driehaus Capital Management
Illinois
-$4.18M
5
AG
Artal Group
Luxembourg
-$3.78M
Name Holding Trade Value Shares
Change 		Change in
Stake
JP Morgan Chase
51
JP Morgan Chase
New York
$1.36M -$39.1K -1,035 -3%
Deutsche Bank
52
Deutsche Bank
Germany
$1.18M -$1.03M -27,314 -50%
Bessemer Group
53
Bessemer Group
New Jersey
$1.11M +$968K +25,600 New
OIM
54
Oracle Investment Management
Connecticut
$1.09M – – –
TRSOTSOK
55
Teachers Retirement System of the State of Kentucky
Kentucky
$889K -$91.1K -2,408 -10%
Manulife (Manufacturers Life Insurance)
56
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$828K +$105K +2,774 +18%
PPA
57
Parametric Portfolio Associates
Washington
$808K +$708K +18,711 New
AIG
58
American International Group
New York
$791K +$163K +4,316 +31%
Wells Fargo
59
Wells Fargo
California
$791K +$216K +5,720 +45%
Citigroup
60
Citigroup
New York
$738K +$21.6K +570 +3%
SO
61
STRS Ohio
Ohio
$734K -$250K -6,600 -28%
Squarepoint
62
Squarepoint
New York
$701K -$821K -21,719 -57%
Voloridge Investment Management
63
Voloridge Investment Management
Florida
$681K +$596K +15,763 New
UBS AM
64
UBS AM
Illinois
$680K +$293K +7,749 +97%
SSA
65
Schonfeld Strategic Advisors
New York
$636K -$40.2K -1,063 -7%
Principal Financial Group
66
Principal Financial Group
Iowa
$590K +$516K +13,649 New
MIM
67
MetLife Investment Management
New Jersey
$580K +$126K +3,344 +33%
Qube Research & Technologies (QRT)
68
Qube Research & Technologies (QRT)
United Kingdom
$566K +$496K +13,111 New
Citadel Advisors
69
Citadel Advisors
Florida
$561K -$942K -24,913 -66%
VOYA Investment Management
70
VOYA Investment Management
Georgia
$450K -$51.7K -1,368 -12%
ProShare Advisors
71
ProShare Advisors
Maryland
$450K +$394K +10,423 New
CF
72
CNA Financial
Illinois
$401K +$351K +9,290 New
MLICM
73
Metropolitan Life Insurance Company (MetLife)
New York
$400K +$74.8K +1,978 +27%
AC
74
Athanor Capital
New York
$365K +$320K +8,460 New
SEI Investments
75
SEI Investments
Pennsylvania
$364K -$9.08K -240 -3%
1 2
3
4 5

YMAB Hedge Fund Activity: Q2 2020 in Review

109 of the 4,878 institutional investors tracked by Wall St. Rank reported a position in Y-mAbs Therapeutics (YMAB) for Q2 2020, worth a combined $920M — up 76% from $523M a quarter earlier.

Buyers outnumbered sellers: 33 funds opened new YMAB positions and 4 closed out — a net gain of 29 holders — while 40 added to existing stakes and 29 trimmed.

The largest buyer was First Light Asset Management, opening a new position worth an estimated $23M. The largest seller was Wellington Management Group, cutting an estimated $15.7M.

  • 109 institutional investors held Y-mAbs Therapeutics (YMAB) as of Q2 2020, up from 80 in Q1 2020.
  • Funds reported $920M of Y-mAbs Therapeutics stock for Q2 2020, up 76% quarter-over-quarter.
  • 33 funds opened new Y-mAbs Therapeutics positions in Q2 2020 and 4 closed out, a net change of +29 holders.
  • The largest Y-mAbs Therapeutics buyer in Q2 2020 was First Light Asset Management, an estimated $23M added.
  • The largest Y-mAbs Therapeutics seller in Q2 2020 was Wellington Management Group, an estimated $15.7M sold.

Based on aggregated 13F filings for Q2 2020.