5VM
MRSN

5AM Venture Management’s Mersana Therapeutics MRSN Stock Holding History

5AM Venture Management’s Portfolio MRSN Stock Details MRSN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q4 		– Sell
-52,200
Closed -$405K – 25
2025
Q3 		$405K Hold
52,200
– – 0.15% 25
2025
Q2 		$386K Hold
52,200
– – 0.15% 29
2025
Q1 		$449K Hold
52,200
– – 0.17% 31
2024
Q4 		$1.87M Hold
52,200
– – 0.45% 29
2024
Q3 		$2.47M Hold
52,200
– – 0.51% 26
2024
Q2 		$2.62M Hold
52,200
– – 0.59% 25
2024
Q1 		$5.85M Hold
52,200
– – 1.31% 23
2023
Q4 		$3.03M Hold
52,200
– – 0.8% 22
2023
Q3 		$1.66M Hold
52,200
– – 0.48% 24
2023
Q2 		$4.29M Buy
52,200
+4,800
+10% +$702K 1.07% 20
2023
Q1 		$4.87M Buy
+47,400
New +$6.65M 1.25% 18

Other funds holding MRSN

NI
Nextech Invest Zurich, Switzerland $1.42B AUM 304.47% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
RSCM
Rock Springs Capital Management Baltimore, Maryland $1.7B AUM 93.03% 1-Year Est. Return
AV
Alamea Verwaltungs Edison, New Jersey $135M AUM 36.32% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
AAA
Affinity Asset Advisors New York $1.71B AUM 374.45% 1-Year Est. Return
BlackRock
BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
Millennium Management
Millennium Management New York $134B AUM 35.51% 1-Year Est. Return