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MRSN
Mersana Therapeutics, Inc. Common Stock
stock NASDAQ

At Close
Dec 19, 2025 3:59:30 PM EST
29.02USD-0.275%(-0.08)85,204
0.00Bid   0.00Ask   0.00Spread
Pre-market
0.00USD-100.000%(-29.10)0
After-hours
Dec 19, 2025 4:00:30 PM EST
28.94USD-0.276%(-0.08)238
OverviewOption ChainMax PainOptionsPrice & VolumeSplitsHistoricalExchange VolumeDark Pool LevelsDark Pool PrintsExchangesShort VolumeShort Interest - DailyShort InterestBorrow Fee (CTB)Failure to Deliver (FTD)ShortsTrendsNewsMore
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Market Cap
144.21M
CEO
Anna Protopapas
Headquarters
Cambridge, Massachusetts, USA
Industry
Biotechnology
Last Split
Jul 28, 20251for25reverse
Related
PDLIPIRSXLV
MRSN Stats
Avg. Vol. 10 Day
56,030
Avg. Vol. 30 Day
176,412
Employees
78
Market Cap
144,213,938
Shares Out.
4,998,750
On/Off Exchange
66%/34%
6 Month Beta
-4.61
1 Year Beta
0.67
2 Year Beta
1.29
3 Year Beta
1.30
52 Week Low
5.21
52 Week High
45.63
SMA50
18.68
SMA200
11.06
1 Week
+1.73%
1 Month
+4.49%
3 Month
+297.93%
6 Month
+215.39%
1 Year
-33.68%
2 Year
-43.15%
5 Year
-95.51%
Profile
mersana is rewriting the rules for immunoconjugate therapies by leveraging our fleximer platform to create precisely targeted and highly tailored drugs that radically improve patients' lives. our fleximer platform allows us to custom design an adc with specific properties to overcome limitations of current adc approaches and increase the drug's chances of effectively attacking a particular cancer. we engineer immunoconjugates to deliver industry-leading payloads of an array of anti-tumor agents directly to cancerous cells, controlling when, where and how those agents are released. because we can safely deliver higher quantities of therapeutic payloads directly to a tumor, mersana's adc therapies have the potential to more effectively treat broader populations of cancer patients while significantly reducing the side effects associated with many of today's cancer treatments.

MRSN Stock Summary

Mersana Therapeutics, Inc. Common Stock (NASDAQ:MRSN) stock price today is $29.02, and today's volume is 85,204. MRSN is down -0.275% today. The 30 day average volume is 176,412. MRSN market cap is 144.21M with 4,998,750 shares outstanding.



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