Institutional Ownership Mersana Therapeutics, Inc. (MRSN)
This table provides information about the institutional ownership of Mersana Therapeutics, Inc. (MRSN). We have compiled data on the 89 institutions that hold shares in the stock, with a total of 95.6 Million shares, which have been reported (via 13F filing form) to have a value of $580 Million.
| Holding | Report Date | shares Held | Holding Value (Reported) | Last Trade | Trade History |
|---|---|---|---|---|---|
|
Nextech Invest, Ltd.
Zurich, V8 |
Aug 14, 2025 Q2 2025 |
12,067,246
shares
|
$73.2 Million
0.68% of portfolio
|
Q1 2025
New holding
|
|
|
Nextech Invest Ag
|
Feb 14, 2025 Q4 2024 |
12,067,246
shares
|
$73.2 Million
3.22% of portfolio
|
Q3 2024
Added 26.68%
|
|
|
Bain Capital Life Sciences Investors, LLC
Boston, MA |
Aug 14, 2025 Q2 2025 |
8,663,673
shares
|
$52.6 Million
0.78% of portfolio
|
Q2 2022
Added 32.84%
|
|
|
Black Rock Inc.
New York, NY |
Aug 13, 2024 Q2 2024 |
8,383,910
shares
|
$50.9 Million
0.0% of portfolio
|
Q2 2024
Added 3.56%
|
|
|
Vanguard Group Inc
Valley Forge, PA |
Aug 11, 2025 Q2 2025 |
7,678,391
shares
|
$46.6 Million
0.0% of portfolio
|
Q2 2025
Reduced 8.35%
|
|
|
Schonfeld Strategic Advisors LLC
New York, NY |
Aug 14, 2025 Q2 2025 |
5,673,852
shares
|
$34.4 Million
0.01% of portfolio
|
Q2 2025
Reduced 25.48%
|
|
|
Aqr Capital Management LLC
Greenwich, CT |
Aug 14, 2025 Q2 2025 |
5,129,685
shares
|
$31.1 Million
0.0% of portfolio
|
Q2 2025
Reduced 0.27%
|
|
|
Rock Springs Capital Management LP
Baltimore, MD |
Aug 14, 2025 Q2 2025 |
3,814,684
shares
|
$23.2 Million
0.08% of portfolio
|
Q1 2025
Added 11.16%
|
|
|
Silverarc Capital Management, LLC
|
Aug 14, 2025 Q2 2025 |
3,128,421
shares
|
$19 Million
0.23% of portfolio
|
Q2 2025
Added 1.29%
|
|
|
Acadian Asset Management LLC
Boston, MA |
Aug 07, 2025 Q2 2025 |
2,955,280
shares
|
$17.9 Million
0.0% of portfolio
|
Q2 2025
Reduced 1.15%
|
|
|
Jim Simons
Renaissance Technologies LLC | New York, Ny
|
Aug 13, 2025 Q2 2025 |
2,850,194
shares
|
$17.3 Million
0.0% of portfolio
|
Q2 2025
Added 239.34%
|
|
|
Israel Englander
Millennium Management LLC | New York, Ny
|
Aug 14, 2025 Q2 2025 |
2,090,235
shares
|
$12.7 Million
0.0% of portfolio
|
Q2 2025
New holding
|
|
|
683 Capital Management, LLC
New York, NY |
Aug 14, 2025 Q2 2025 |
1,990,000
shares
|
$12.1 Million
0.05% of portfolio
|
Q2 2025
Added 20.61%
|
|
|
Catalio Capital Management, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
1,567,413
shares
|
$9.51 Million
0.1% of portfolio
|
Q2 2025
Reduced 8.07%
|
|
|
Goldman Sachs Group Inc
New York, NY |
Aug 14, 2025 Q2 2025 |
1,433,760
shares
|
$8.7 Million
0.0% of portfolio
|
Q2 2025
Added 144.39%
|
|
|
Jacobs Levy Equity Management, Inc
Florham Park, NJ |
Aug 14, 2025 Q2 2025 |
1,332,945
shares
|
$8.09 Million
0.0% of portfolio
|
Q2 2025
Reduced 0.01%
|
|
|
5 Am Venture Management, LLC
San Francisco, CA |
Aug 14, 2025 Q2 2025 |
1,305,000
shares
|
$7.92 Million
0.26% of portfolio
|
Q2 2023
Added 10.13%
|
|
|
Geode Capital Management, LLC
Boston, MA |
Aug 08, 2025 Q2 2025 |
1,049,205
shares
|
$6.37 Million
0.0% of portfolio
|
Q2 2025
Reduced 57.04%
|
|
|
Luminus Management LLC
Houston, TX |
Aug 14, 2025 Q2 2025 |
1,039,314
shares
|
$6.31 Million
0.31% of portfolio
|
Q2 2025
New holding
|
|
|
David A. Siegel
Two Sigma Advisers, LP | New York, Ny
|
Aug 14, 2025 Q2 2025 |
937,000
shares
|
$5.69 Million
0.0% of portfolio
|
Q2 2025
Added 262.9%
|
|
|
Decheng Capital Management Iii (Cayman), LLC
|
Nov 13, 2023 Q3 2023 |
904,268
shares
|
$5.49 Million
0.64% of portfolio
|
Q1 2022
New holding
|
|
|
Two Sigma Investments, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
823,269
shares
|
$5 Million
0.0% of portfolio
|
Q2 2025
Added 1434.46%
|
|
|
Ubs Group Ag
|
Aug 14, 2025 Q2 2025 |
775,501
shares
|
$4.71 Million
0.0% of portfolio
|
Q2 2025
Added 142.49%
|
|
|
Lion Point Capital, LP
New York, NY |
Aug 14, 2025 Q2 2025 |
644,000
shares
|
$3.91 Million
2.17% of portfolio
|
Q1 2025
New holding
|
|
|
Ieq Capital, LLC
|
Aug 14, 2025 Q2 2025 |
638,452
shares
|
$3.88 Million
0.0% of portfolio
|
Q2 2025
Reduced 9.7%
|