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

98 hedge funds and large institutions have $107M invested in Y-mAbs Therapeutics in 2023 Q3 according to their latest regulatory filings, with 9 funds opening new positions, 31 increasing their positions, 36 reducing their positions, and 6 closing their positions.

New
Increased
Maintained
Reduced
Closed

50% more first-time investments, than exits

New positions opened: 9 | Existing positions closed: 6

3% more funds holding

Funds holding: 95 → 98 (+3)

0.42% more ownership

Funds ownership: 44.65% → 45.07% (+0.42%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

14% less repeat investments, than reductions

Existing positions increased: 31 | Existing positions reduced: 36

19% less capital invested

Capital invested by funds: $132M → $107M (-$25.2M)

Holders
98
Holders Change
+3
Holders Change %
+3.16%
% of All Funds
1.56%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.02%
New
9
Increased
31
Reduced
36
Closed
6
Calls
$16K
Puts
–
Net Calls
+$16K
Net Calls Change
-$9K

Top Buyers

Rank Fund Capital Flow
1
Citadel Advisors
Citadel Advisors
Florida
+$2.23M
2
Acadian Asset Management
Acadian Asset Management
Massachusetts
+$915K
3
Dimensional Fund Advisors
Dimensional Fund Advisors
Texas
+$653K
4
GCP
GSA Capital Partners
United Kingdom
+$540K
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
+$430K

Top Sellers

Rank Fund Capital Flow
1
Point72 Asset Management
Point72 Asset Management
Connecticut
-$1.77M
2
CSS
Cubist Systematic Strategies
Connecticut
-$594K
3
Two Sigma Investments
Two Sigma Investments
New York
-$534K
4
AllianceBernstein
AllianceBernstein
Tennessee
-$522K
5
N
Nuveen
North Carolina
-$387K
Name Holding Trade Value Shares
Change 		Change in
Stake
Bank of New York Mellon
26
Bank of New York Mellon
New York
$652K +$7.68K +1,319 +1%
Victory Capital Management
27
Victory Capital Management
Texas
$597K +$107K +18,320 +20%
Morgan Stanley
28
Morgan Stanley
New York
$588K -$132K -22,748 -17%
State of Wisconsin Investment Board
29
State of Wisconsin Investment Board
Wisconsin
$554K +$5.24K +900 +0.9%
Marshall Wace
30
Marshall Wace
United Kingdom
$539K -$167K -28,737 -23%
BCM
31
Bridgeway Capital Management
Texas
$521K +$120K +20,600 +27%
RHJA
32
Rice Hall James & Associates
California
$497K -$10.3K -1,773 -2%
SO
33
STRS Ohio
Ohio
$485K +$86.8K +14,900 +20%
DA
34
Denali Advisors
California
$468K – – –
Massachusetts Financial Services
35
Massachusetts Financial Services
Massachusetts
$448K +$345K +59,201 +258%
Point72 Asset Management
36
Point72 Asset Management
Connecticut
$434K -$1.77M -303,987 -79%
AllianceBernstein
37
AllianceBernstein
Tennessee
$421K -$522K -89,700 -54%
TI
38
Trexquant Investment
Connecticut
$417K +$360K +61,785 +417%
Two Sigma Investments
39
Two Sigma Investments
New York
$398K -$534K -91,743 -56%
NYLIM
40
New York Life Investment Management
New York
$387K -$65.8K -11,307 -14%
RhumbLine Advisers
41
RhumbLine Advisers
Massachusetts
$299K +$12.2K +2,098 +4%
Ameriprise
42
Ameriprise
Minnesota
$228K +$61.7K +10,600 +34%
SFI
43
Susquehanna Fundamental Investments
Pennsylvania
$223K – – –
VOYA Investment Management
44
VOYA Investment Management
Georgia
$209K +$23.4K +4,024 +12%
CSS
45
Cubist Systematic Strategies
Connecticut
$199K -$594K -101,995 -74%
Fidelity Investments
46
Fidelity Investments
Massachusetts
$197K -$5.22K -897 -2%
Bank of America
47
Bank of America
North Carolina
$188K -$7.45K -1,280 -4%
JP Morgan Chase
48
JP Morgan Chase
New York
$177K -$34.9K -6,000 -16%
XT
49
XTX Topco
Cayman Islands
$173K -$79K -13,571 -30%
Russell Investments Group
50
Russell Investments Group
United Kingdom
$145K -$9.16K -1,573 -6%
1
2
3 4 5

YMAB Hedge Fund Activity: Q3 2023 in Review

98 of the 6,302 institutional investors tracked by Wall St. Rank reported a position in Y-mAbs Therapeutics (YMAB) for Q3 2023, worth a combined $107M — down 19% from $132M a quarter earlier.

Buyers outnumbered sellers: 9 funds opened new YMAB positions and 6 closed out — a net gain of 3 holders — while 31 added to existing stakes and 36 trimmed.

The largest buyer was Citadel Advisors, adding an estimated $2.23M. The largest seller was Point72 Asset Management, cutting an estimated $1.77M.

  • 98 institutional investors held Y-mAbs Therapeutics (YMAB) as of Q3 2023, up from 95 in Q2 2023.
  • Funds reported $107M of Y-mAbs Therapeutics stock for Q3 2023, down 19% quarter-over-quarter.
  • 9 funds opened new Y-mAbs Therapeutics positions in Q3 2023 and 6 closed out, a net change of +3 holders.
  • The largest Y-mAbs Therapeutics buyer in Q3 2023 was Citadel Advisors, an estimated $2.23M added.
  • The largest Y-mAbs Therapeutics seller in Q3 2023 was Point72 Asset Management, an estimated $1.77M sold.

Based on aggregated 13F filings for Q3 2023.