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MRSN

Mersana Therapeutics

Delisted

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

1 hedge funds and large institutions have $87 invested in Mersana Therapeutics in 2026 Q1 according to their latest regulatory filings, with 0 funds opening new positions, 0 increasing their positions, 0 reducing their positions, and 49 closing their positions.

New
Increased
Maintained
Reduced
Closed

44.91% less ownership

Funds ownership: 44.91%0% (-45%)

98% less funds holding

Funds holding: 511 (-50)

100% less funds holding in top 10

Funds holding in top 10: 20 (-2)

100% less capital invested

Capital invested by funds: $64.8M → $87 (-$64.8M)

100% less first-time investments, than exits

New positions opened: 0 | Existing positions closed: 49

Holders
1
Holders Change
-50
Holders Change %
-98.04%
% of All Funds
0.01%
Holding in Top 10
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-100%
% of All Funds
New
Increased
Reduced
Closed
49
Calls
Puts
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
IA
1
IFP Advisors
Florida
$87
NI
2
Nextech Invest
Switzerland
-$14M -482,689 Closed
BCLSI
3
Bain Capital Life Sciences Investors
Massachusetts
-$10M -346,545 Closed
RSCM
4
Rock Springs Capital Management
Maryland
-$4.41M -152,586 Closed
DMKJ
5
David M. Knott Jr
-$438K -111,686 Closed
Acadian Asset Management
6
Acadian Asset Management
Massachusetts
-$3.21M -110,882 Closed
AAA
7
Affinity Asset Advisors
New York
-$2.89M -100,000 Closed
BlackRock
8
BlackRock
New York
-$2M -69,210 Closed
Bank of America
9
Bank of America
North Carolina
-$1.9M -65,749 Closed
Millennium Management
10
Millennium Management
New York
-$1.83M -63,305 Closed
GLF
11
Groupe la Francaise
France
-$1.78M -61,488 Closed
RC
12
Rangeley Capital
Connecticut
-$1.65M -57,098 Closed
GF
13
Gabelli Funds
New York
-$1.37M -47,300 Closed
Geode Capital Management
14
Geode Capital Management
Massachusetts
-$1.27M -43,920 Closed
CIEC
15
Crédit Industriel et Commercial
France
-$1.2M -41,392 Closed
AQR Capital Management
16
AQR Capital Management
Connecticut
-$1.08M -37,264 Closed
Mackenzie Financial
17
Mackenzie Financial
Ontario, Canada
-$967K -33,834 Closed
YCM
18
Yakira Capital Management
Connecticut
-$945K -32,663 Closed
AV
19
Alamea Verwaltungs
New Jersey
-$3.34M -24,165 Closed
Citadel Advisors
20
Citadel Advisors
Florida
-$651K -22,493 Closed
State Street
21
State Street
Massachusetts
-$565K -19,543 Closed
Morgan Stanley
22
Morgan Stanley
New York
-$535K -18,496 Closed
DAM
23
Deltec Asset Management
New York
-$521K -18,000 Closed
IC
24
IEQ Capital
California
-$375K -12,955 Closed
XT
25
XTX Topco
Cayman Islands
-$346K -11,948 Closed