We are live on ! Find out more
YMAB

Y-mAbs Therapeutics
YMAB

Delisted

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

Back to rankings

80 hedge funds and large institutions have $523M invested in Y-mAbs Therapeutics in 2020 Q1 according to their latest regulatory filings, with 9 funds opening new positions, 31 increasing their positions, 30 reducing their positions, and 10 closing their positions.

New
Increased
Maintained
Reduced
Closed

1.65% more ownership

Funds ownership: 48.84% → 50.49% (+1.6%)

3% more repeat investments, than reductions

Existing positions increased: 31 | Existing positions reduced: 30

0% more funds holding in top 10

Funds holding in top 10: 3 → 3 (0)

1% less funds holding

Funds holding: 81 → 80 (-1)

10% less first-time investments, than exits

New positions opened: 9 | Existing positions closed: 10

14% less capital invested

Capital invested by funds: $606M → $523M (-$83.8M)

Holders
80
Holders Change
-1
Holders Change %
-1.23%
% of All Funds
1.76%
Holding in Top 10
3
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.07%
New
9
Increased
31
Reduced
30
Closed
10
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
Artisan Partners
Artisan Partners
Wisconsin
+$15.9M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$8.35M
3
Loomis, Sayles & Company
Loomis, Sayles & Company
Massachusetts
+$4.7M
4
PC
Polar Capital
United Kingdom
+$3.95M
5
Aviva
Aviva
United Kingdom
+$3.85M

Top Sellers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
-$7.11M
2
Morgan Stanley
Morgan Stanley
New York
-$7.02M
3
BBA
Baker Bros. Advisors
New York
-$4.33M
4
PI
Putnam Investments
Massachusetts
-$3.94M
5
Deutsche Bank
Deutsche Bank
Germany
-$3.1M
Name Holding Trade Value Shares
Change 		Change in
Stake
Canada Life
76
Canada Life
Manitoba, Canada
$38K – – –
MAM
77
Meeder Asset Management
Ohio
$11K -$171K -5,892 -93%
Daiwa Securities Group
78
Daiwa Securities Group
Japan
$6K – – –
Bank of Montreal
79
Bank of Montreal
Ontario, Canada
$3K -$83.5K -2,877 -96%
Royal Bank of Canada
80
Royal Bank of Canada
Ontario, Canada
$3K -$14.6K -503 -81%
BBA
81
Baker Bros. Advisors
New York
– -$4.33M -138,514 Closed
Voloridge Investment Management
82
Voloridge Investment Management
Florida
– -$855K -27,344 Closed
Renaissance Technologies
83
Renaissance Technologies
New York
– -$813K -26,000 Closed
Rafferty Asset Management
84
Rafferty Asset Management
New York
– -$530K -16,962 Closed
LI
85
Leap Investments
Illinois
– -$418K -13,383 Closed
ProShare Advisors
86
ProShare Advisors
Maryland
– -$369K -11,795 Closed
Qube Research & Technologies (QRT)
87
Qube Research & Technologies (QRT)
United Kingdom
– -$237K -7,588 Closed
ARTA
88
A.R.T. Advisors
New York
– -$203K -6,482 Closed
TRCT
89
Tower Research Capital (TRC)
New York
– -$17K -552 Closed
Rockefeller Capital Management
90
Rockefeller Capital Management
New York
– -$5K -150 Closed
1 2 3
4

YMAB Hedge Fund Activity: Q1 2020 in Review

80 of the 4,539 institutional investors tracked by Wall St. Rank reported a position in Y-mAbs Therapeutics (YMAB) for Q1 2020, worth a combined $523M — down 14% from $606M a quarter earlier.

Sellers outnumbered buyers: 10 funds closed out of YMAB and 9 opened new positions — a net loss of 1 holder — while 30 trimmed existing stakes and 31 added.

The largest buyer was Artisan Partners, opening a new position worth an estimated $15.9M. The largest seller was Millennium Management, cutting an estimated $7.11M.

  • 80 institutional investors held Y-mAbs Therapeutics (YMAB) as of Q1 2020, down from 81 in Q4 2019.
  • Funds reported $523M of Y-mAbs Therapeutics stock for Q1 2020, down 14% quarter-over-quarter.
  • 9 funds opened new Y-mAbs Therapeutics positions in Q1 2020 and 10 closed out, a net change of -1 holder.
  • The largest Y-mAbs Therapeutics buyer in Q1 2020 was Artisan Partners, an estimated $15.9M added.
  • The largest Y-mAbs Therapeutics seller in Q1 2020 was Millennium Management, an estimated $7.11M sold.

Based on aggregated 13F filings for Q1 2020.