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Mersana Therapeutics Inc
MRSNAdd to Watchlist
29.080USD
0.0000.00%
Close 07/02, 13:00（ET）Quotes delayed by 15 min
145.36MMarket Cap
LossP/E TTM
Shareholding Stats
Updated: Thu, May 14
Updated: Thu, May 14
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Rock Springs Capital Management LP
3.05%
Acadian Asset Management LLC
2.22%
Affinity Asset Advisors LLC
2.00%
BlackRock Institutional Trust Company, N.A.
1.38%
BofA Global Research (US)
1.32%
Other
90.03%
Shareholders
Shareholders
Proportion
Rock Springs Capital Management LP
3.05%
Acadian Asset Management LLC
2.22%
Affinity Asset Advisors LLC
2.00%
BlackRock Institutional Trust Company, N.A.
1.38%
BofA Global Research (US)
1.32%
Other
90.03%
Shareholder Types
Shareholders
Proportion
Hedge Fund
8.33%
Investment Advisor/Hedge Fund
6.23%
Investment Advisor
3.92%
Research Firm
1.73%
Individual Investor
0.67%
Family Office
0.26%
Venture Capital
0.24%
Pension Fund
0.16%
Other
78.46%
Institutional Shareholding
Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
263
1.24M
24.80%
-4.13M
2025Q4
270
3.37M
67.46%
-1.47M
2025Q3
299
3.05M
61.05%
-2.62M
2025Q2
344
3.57M
71.71%
-3.19M
2025Q1
381
91.14M
73.20%
-85.10M
2024Q4
376
108.41M
87.04%
-80.71M
2024Q3
381
121.20M
99.04%
-61.95M
2024Q2
378
118.97M
97.46%
-69.30M
2024Q1
377
122.29M
100.13%
-59.89M
2023Q4
366
116.96M
97.07%
-50.97M
View more
Shareholder Activity
Name
Shares Held
Proportion
Change
Chg %
Date
Rock Springs Capital Management LP
152.59K
3.05%
--
--
Dec 31, 2025
Acadian Asset Management LLC
110.88K
2.22%
-31.48K
-22.11%
Dec 31, 2025
Affinity Asset Advisors LLC
100.00K
2%
+100.00K
--
Dec 31, 2025
BlackRock Institutional Trust Company, N.A.
69.14K
1.38%
-24.30K
-26.01%
Dec 31, 2025
BofA Global Research (US)
65.75K
1.32%
-648.00
-0.98%
Dec 31, 2025
Millennium Management LLC
63.30K
1.27%
-14.68K
-18.83%
Dec 31, 2025
La Française AM
61.49K
1.23%
+61.49K
--
Dec 31, 2025
Gabelli Funds, LLC
57.30K
1.15%
+55.30K
+2765.00%
Dec 31, 2025
Rangeley Capital LLC
57.10K
1.14%
+57.10K
--
Dec 31, 2025
Geode Capital Management, L.L.C.
43.92K
0.88%
+2.27K
+5.46%
Dec 31, 2025
View more
Related ETFs
Updated: Tue, Dec 2
Updated: Tue, Dec 2
Name
Proportion
State Street SPDR S&P Biotech ETF
0%
Direxion Daily S&P Biotech Bull 3X Shares
0%
Invesco Nasdaq Biotechnology ETF
0%
ProShares Hedge Replication ETF
0%
Pacer WealthShield ETF
0%
ProShares Ultra Nasdaq Biotechnology
0%
Global X Russell 2000 Covered Call ETF
0%
Avantis US Equity ETF
0%
iShares Micro-Cap ETF
0%
Global X Russell 2000 ETF
0%
View more
State Street SPDR S&P Biotech ETF
Proportion0%
Direxion Daily S&P Biotech Bull 3X Shares
Proportion0%
Invesco Nasdaq Biotechnology ETF
Proportion0%
ProShares Hedge Replication ETF
Proportion0%
Pacer WealthShield ETF
Proportion0%
ProShares Ultra Nasdaq Biotechnology
Proportion0%
Global X Russell 2000 Covered Call ETF
Proportion0%
Avantis US Equity ETF
Proportion0%
iShares Micro-Cap ETF
Proportion0%
Global X Russell 2000 ETF
Proportion0%