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YMAB

Y-mAbs Therapeutics
YMAB

Delisted

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

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65 hedge funds and large institutions have $342M invested in Y-mAbs Therapeutics in 2019 Q3 according to their latest regulatory filings, with 11 funds opening new positions, 28 increasing their positions, 14 reducing their positions, and 5 closing their positions.

New
Increased
Maintained
Reduced
Closed

120% more first-time investments, than exits

New positions opened: 11 | Existing positions closed: 5

100% more repeat investments, than reductions

Existing positions increased: 28 | Existing positions reduced: 14

36% more capital invested

Capital invested by funds: $251M → $342M (+$91.5M)

10% more funds holding

Funds holding: 59 → 65 (+6)

6.34% more ownership

Funds ownership: 32.09% → 38.43% (+6.3%)

0% more funds holding in top 10

Funds holding in top 10: 1 → 1 (0)

Holders
65
Holders Change
+6
Holders Change %
+10.17%
% of All Funds
1.43%
Holding in Top 10
1
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
0.02%
New
11
Increased
28
Reduced
14
Closed
5
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

Rank Fund Capital Flow
1
PA
Perceptive Advisors
New York
+$21.8M
2
Wellington Management Group
Wellington Management Group
Massachusetts
+$10.5M
3
Vanguard Group
Vanguard Group
Pennsylvania
+$6.47M
4
BlackRock
BlackRock
New York
+$4.36M
5
Northern Trust
Northern Trust
Illinois
+$3.41M

Top Sellers

Rank Fund Capital Flow
1
Millennium Management
Millennium Management
New York
-$5.56M
2
CAM
Cormorant Asset Management
Massachusetts
-$2.97M
3
Point72 Asset Management
Point72 Asset Management
Connecticut
-$686K
4
Deutsche Bank
Deutsche Bank
Germany
-$253K
5
Citigroup
Citigroup
New York
-$134K
Name Holding Trade Value Shares
Change 		Change in
Stake
AA
26
ALPS Advisors
Colorado
$1.78M -$86.9K -3,400 -5%
VIA
27
Vident Investment Advisory
Georgia
$1.68M -$47.1K -1,845 -3%
Bank of New York Mellon
28
Bank of New York Mellon
New York
$1.54M +$29.9K +1,172 +2%
Bank of America
29
Bank of America
North Carolina
$1.53M +$1.01M +39,586 +206%
Squarepoint
30
Squarepoint
New York
$1.28M +$757K +29,614 +150%
JP Morgan Chase
31
JP Morgan Chase
New York
$917K +$51.3K +2,007 +6%
California State Teachers Retirement System (CalSTRS)
32
California State Teachers Retirement System (CalSTRS)
California
$826K +$9.68K +379 +1%
State of Wisconsin Investment Board
33
State of Wisconsin Investment Board
Wisconsin
$797K +$524K +20,500 +203%
TD Asset Management
34
TD Asset Management
Ontario, Canada
$697K +$33.2K +1,300 +5%
Wells Fargo
35
Wells Fargo
California
$695K +$191K +7,469 +39%
RhumbLine Advisers
36
RhumbLine Advisers
Massachusetts
$575K +$15.7K +616 +3%
SO
37
STRS Ohio
Ohio
$575K +$516K +20,200 +1,063%
New York State Common Retirement Fund
38
New York State Common Retirement Fund
New York
$542K – – –
UBS Group
39
UBS Group
Switzerland
$411K +$343K +13,423 +569%
PC
40
Polar Capital
United Kingdom
$404K +$396K +15,502 New
Manulife (Manufacturers Life Insurance)
41
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$347K +$9.66K +378 +3%
AIG
42
American International Group
New York
$335K -$2.27K -89 -0.7%
Barclays
43
Barclays
United Kingdom
$331K -$10.7K -418 -3%
Swiss National Bank
44
Swiss National Bank
Switzerland
$331K – – –
TCM
45
Tuttle Capital Management
Connecticut
$309K +$297K +11,618 New
Two Sigma Investments
46
Two Sigma Investments
New York
$307K +$301K +11,775 New
MIM
47
MetLife Investment Management
New Jersey
$262K – – –
California Public Employees Retirement System
48
California Public Employees Retirement System
California
$254K +$249K +9,763 New
CS
49
Credit Suisse
Switzerland
$246K +$241K +9,415 New
Susquehanna International Group
50
Susquehanna International Group
Pennsylvania
$234K +$229K +8,974 New
1
2
3

YMAB Hedge Fund Activity: Q3 2019 in Review

65 of the 4,561 institutional investors tracked by Wall St. Rank reported a position in Y-mAbs Therapeutics (YMAB) for Q3 2019, worth a combined $342M — up 36% from $251M a quarter earlier.

Buyers outnumbered sellers: 11 funds opened new YMAB positions and 5 closed out — a net gain of 6 holders — while 28 added to existing stakes and 14 trimmed.

The largest buyer was Perceptive Advisors, opening a new position worth an estimated $21.8M. The largest seller was Millennium Management, cutting an estimated $5.56M.

  • 65 institutional investors held Y-mAbs Therapeutics (YMAB) as of Q3 2019, up from 59 in Q2 2019.
  • Funds reported $342M of Y-mAbs Therapeutics stock for Q3 2019, up 36% quarter-over-quarter.
  • 11 funds opened new Y-mAbs Therapeutics positions in Q3 2019 and 5 closed out, a net change of +6 holders.
  • The largest Y-mAbs Therapeutics buyer in Q3 2019 was Perceptive Advisors, an estimated $21.8M added.
  • The largest Y-mAbs Therapeutics seller in Q3 2019 was Millennium Management, an estimated $5.56M sold.

Based on aggregated 13F filings for Q3 2019.