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MRSN

Mersana Therapeutics

Delisted

MRSN was delisted on the 5th of January, 2026.

120 hedge funds and large institutions have $230M invested in Mersana Therapeutics in 2024 Q2 according to their latest regulatory filings, with 20 funds opening new positions, 44 increasing their positions, 36 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed

22% more repeat investments, than reductions

Existing positions increased: 44 | Existing positions reduced: 36

19% more call options, than puts

Call options by funds: $1.5M | Put options by funds: $1.26M

0.14% less ownership

Funds ownership: 3.87%3.73% (-0.14%)

9% less first-time investments, than exits

New positions opened: 20 | Existing positions closed: 22

2% less funds holding

Funds holding: 122120 (-2)

50% less funds holding in top 10

Funds holding in top 10: 21 (-1)

56% less capital invested

Capital invested by funds: $526M → $230M (-$297M)

Holders
120
Holders Change
-2
Holders Change %
-1.64%
% of All Funds
1.73%
Holding in Top 10
1
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-50%
% of All Funds
0.01%
New
20
Increased
44
Reduced
36
Closed
22
Calls
$1.5M
Puts
$1.26M
Net Calls
+$244K
Net Calls Change
+$2.23M
Name Holding Trade Value Shares
Change
Change in
Stake
Northern Trust
26
Northern Trust
Illinois
$1.81M -$129K -1,782 -5%
AAA
27
Affinity Asset Advisors
New York
$1.54M -$674K -9,320 -23%
Two Sigma Investments
28
Two Sigma Investments
New York
$1.5M +$1.53M +21,230 +244%
Two Sigma Advisers
29
Two Sigma Advisers
New York
$1.45M +$1.63M +22,540 +362%
Millennium Management
30
Millennium Management
New York
$1.39M -$2.36M -32,632 -54%
UOC
31
UBS O'Connor
Illinois
$1.09M +$318K +4,400 +25%
Wellington Management Group
32
Wellington Management Group
Massachusetts
$1.07M -$5.06K -70 -0.3%
CAM
33
ClariVest Asset Management
California
$1.01M +$82.9K +1,146 +6%
Jacobs Levy Equity Management
34
Jacobs Levy Equity Management
New Jersey
$976K -$938K -12,971 -40%
BCM
35
Bridgeway Capital Management
Texas
$956K +$703K +9,728 +105%
Bank of New York Mellon
36
Bank of New York Mellon
New York
$910K +$214K +2,964 +20%
Barclays
37
Barclays
United Kingdom
$749K -$106K -1,460 -9%
AI
38
Atom Investors
Texas
$735K -$213K -2,952 -17%
BNP Paribas Financial Markets
39
BNP Paribas Financial Markets
France
$676K +$738K +10,214 +316%
Jane Street
40
Jane Street
New York
$638K -$154K -2,132 -14%
Charles Schwab
41
Charles Schwab
California
$628K +$48.4K +670 +6%
SFI
42
Susquehanna Fundamental Investments
Pennsylvania
$620K +$216K +2,983 +32%
HF
43
HRT Financial
New York
$521K +$751K +10,388 New
Squarepoint
44
Squarepoint
New York
$508K +$731K +10,112 New
Fidelity Investments
45
Fidelity Investments
Massachusetts
$493K -$232K -3,208 -25%
PAM
46
Panagora Asset Management
Massachusetts
$475K +$506 +7 +0.1%
AllianceBernstein
47
AllianceBernstein
Tennessee
$374K +$49.9K +690 +10%
Federated Hermes
48
Federated Hermes
Pennsylvania
$373K +$536K +7,413 +105,900%
HP
49
HealthInvest Partners
Sweden
$372K +$246K +3,396 +85%
RhumbLine Advisers
50
RhumbLine Advisers
Massachusetts
$354K -$8.31K -115 -2%