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
New York State Common Retirement Fund
26
New York State Common Retirement Fund
New York
$3.13M +$2.88M +99,278 +477%
N
27
Nuveen
North Carolina
$2.81M +$65.9K +2,271 +2%
PI
28
Putnam Investments
Massachusetts
$2.3M -$3.94M -135,632 -61%
Bank of New York Mellon
29
Bank of New York Mellon
New York
$2.23M +$47.4K +1,631 +2%
TCM
30
Tekla Capital Management
Massachusetts
$2M +$1.89M +65,222 +576%
Bank of America
31
Bank of America
North Carolina
$1.76M -$545K -18,785 -22%
CS
32
Candriam SCA
Luxembourg
$1.76M +$581 +20 +0%
Two Sigma Advisers
33
Two Sigma Advisers
New York
$1.68M +$613K +21,100 +49%
RHJA
34
Rice Hall James & Associates
California
$1.66M +$699K +24,062 +61%
Allianz Asset Management
35
Allianz Asset Management
Germany
$1.61M +$1.8M +61,828 New
Deutsche Bank
36
Deutsche Bank
Germany
$1.43M -$3.1M -106,660 -66%
California Public Employees Retirement System
37
California Public Employees Retirement System
California
$1.32M +$327K +11,260 +29%
VIA
38
Vident Investment Advisory
Georgia
$1.17M -$92K -3,168 -7%
State of Wisconsin Investment Board
39
State of Wisconsin Investment Board
Wisconsin
$1.07M +$308K +10,600 +35%
Swiss National Bank
40
Swiss National Bank
Switzerland
$1M +$31.9K +1,100 +3%
Squarepoint
41
Squarepoint
New York
$990K -$1M -34,538 -48%
Citadel Advisors
42
Citadel Advisors
Florida
$990K -$941K -32,415 -46%
California State Teachers Retirement System (CalSTRS)
43
California State Teachers Retirement System (CalSTRS)
California
$932K -$11.7K -403 -1%
JP Morgan Chase
44
JP Morgan Chase
New York
$847K -$51.2K -1,762 -5%
RhumbLine Advisers
45
RhumbLine Advisers
Massachusetts
$732K +$24K +826 +3%
OIM
46
Oracle Investment Management
Connecticut
$658K +$732K +25,212 New
SO
47
STRS Ohio
Ohio
$615K – – –
TRSOTSOK
48
Teachers Retirement System of the State of Kentucky
Kentucky
$600K +$241K +8,292 +56%
AR
49
Advisory Research
Illinois
$584K -$336K -11,560 -34%
CS
50
Credit Suisse
Switzerland
$553K -$292K -10,071 -32%
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.