Free Trial
→ $100 Trillion “AI Metal” Found in American Ghost Town (From Brownstone Research) (Ad)tc pixel Free MRSN Stock Alerts

Mersana Therapeutics (MRSN) Stock Chart & Stock Price History

Mersana Therapeutics logo
$7.14 -0.33 (-4.42%)
Closing price 09/12/2025 04:00 PM Eastern
Extended Trading
$7.20 +0.06 (+0.77%)
As of 09/12/2025 07:38 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Polygon.io. Learn more.
Compare

Mersana Therapeutics Stock Price Performance

The Mersana Therapeutics (MRSN) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 86.46%, with a year-to-date return of -80.03%. In the past month, the stock has increased 4.85%, reflecting recent market activity.

As of the latest close, Mersana Therapeutics traded at $7.14 with a market cap of $35.64 million and volume of 27,266 shares. Five years ago, the stock traded at a split-adjusted price of $466.25, representing a 98.47% decrease over that period. At the time, it had a market cap of $1.25 billion and a volume of 22,356 shares.

Receive MRSN Stock News and Ratings via Email

Sign-up to receive the latest news and ratings for Mersana Therapeutics and its competitors with MarketBeat's FREE daily newsletter.

Subscribe Now
By entering your phone number and clicking the sign-up button, you agree to receive periodic text messages from MarketBeat at the phone number you submitted, including texts that may be sent using an automatic telephone dialing system. Message and data rates may apply. Message frequency will vary. Messages will consist of stock alerts, news stories, and partner advertisements/offers. Consent is not a condition of the purchase of any goods or services. Text HELP for help/customer support. Unsubscribe at any time by replying "STOP" to any text message that you receive from MarketBeat or by visiting our mailing preferences page. Read our full terms of service and privacy policy.
5 Day
Performance
+1.42%
1 Month
Performance
+4.85%
3 Month
Performance
-22.22%
Year-To-Date
Performance
-80.03%
1 Year
Performance
-86.46%
5 Year
Performance
-98.47%

MRSN Stock Chart for Saturday, September, 13, 2025

MRSN Chart by TradingView

Mersana Therapeutics Stock Price History

Export to Excel
DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization
09/12/2025$7.47$7.14
-4.42%		$7.46$7.1327,266 shs$35.64 million
09/11/2025$7.35$7.47
+1.63%		$7.53$7.2630,561 shs$37.28 million
09/10/2025$7.66$7.35
-4.05%		$7.70$7.3350,337 shs$36.68 million
09/09/2025$7.04$7.66
+8.81%		$7.66$6.9065,974 shs$38.23 million
09/08/2025$6.82$7.04
+3.23%		$7.10$6.6359,781 shs$35.13 million
09/05/2025$7.12$6.82
-4.21%		$7.25$6.7988,382 shs$34.03 million
09/04/2025$6.98$7.12
+2.01%		$7.16$6.8045,956 shs$35.53 million
09/03/2025$7.02$6.98
-0.57%		$7.55$6.9747,664 shs$34.84 million
09/02/2025$7.32$7.02
-4.10%		$7.53$6.9751,812 shs$35.03 million
09/01/2025$7.32$7.32$7.85$7.3240,654 shs$36.53 million
08/29/2025$7.66$7.32
-4.44%		$7.85$7.3240,654 shs$36.53 million
08/28/2025$7.63$7.66
+0.39%		$8.05$7.5453,503 shs$38.23 million
08/27/2025$7.65$7.63
-0.26%		$7.74$7.5531,886 shs$38.07 million
08/26/2025$7.65$7.65$7.71$7.4152,342 shs$38.17 million
08/25/2025$7.75$7.65
-1.29%		$8.09$7.5190,518 shs$38.18 million
08/22/2025$8.11$7.75
-4.44%		$8.19$7.7171,731 shs$38.68 million
08/21/2025$7.29$8.11
+11.25%		$8.13$7.10308,536 shs$40.47 million
08/20/2025$7.24$7.29
+0.69%		$7.39$6.9636,837 shs$36.38 million
08/19/2025$7.38$7.24
-1.90%		$7.42$7.0377,280 shs$36.14 million
08/18/2025$7.16$7.38
+3.07%		$7.68$7.0799,147 shs$36.83 million
08/15/2025$7.42$7.16
-3.50%		$7.44$7.0079,994 shs$35.73 million
08/14/2025$6.81$7.42
+8.96%		$7.72$6.82226,499 shs$37.03 million
08/13/2025$6.07$6.81
+12.19%		$6.82$5.21253,830 shs$33.95 million
08/12/2025$5.97$6.07
+1.68%		$6.31$5.9752,767 shs$30.29 million
Related Companies

This page (NASDAQ:MRSN) was last updated on 9/13/2025 by MarketBeat.com Staff
From Our Partners
He Called Nvidia at $1.10. Now, He Says THIS Stock Will…
The original Magnificent Seven returned 16,894%—turning $7K into $1.18 million. Now, the man who called Nvi...
The Oxford Club | Sponsoredtc pixel
Why Trump’s “Smart Dollar” could rewrite the rules
MUST SEE: Donald Trump's Radical Overhaul of the U.S. Dollar Congress just approved President Trump's lates...
Stansberry Research | Sponsoredtc pixel
Trump's Law S.1582: $21T Dollar Revolution Coming
Do you have money in any of these banks? Chase. Bank of America. Citigroup. Wells Fargo. U.S. Bancorp. I...
Brownstone Research | Sponsoredtc pixel
Retire Comfortably with These New Monthly Income ETFs?
Too many retirees lie awake at night, worried their savings won’t last. Traditional advice and tiny returns ju...
Investors Alley | Sponsoredtc pixel
Forget Tesla — This Tiny AI Stock Is Musk’s Real Play
While Wall Street focused on Tesla’s earnings, Elon Musk was quietly building a supercomputer so powerful it c...
Behind the Markets | Sponsoredtc pixel
INVESTOR ALERT: Tiny “$3 AI Wonder Stock” on the Verge of Blasting Off
Right now, we’re witnessing a monumental shift in the world.
Traders Agency | Sponsoredtc pixel
“Sell Nvidia before earnings”
Eric Fry just went live with one of his most controversial calls yet: “Sell Nvidia.” While Wall Street has bee...
InvestorPlace | Sponsoredtc pixel
Nvidia Times 1,000,000
Nvidia’s latest AI chip is a $25,000 powerhouse — with 80 billion transistors and the ability to perform 60 tr...
Paradigm Press | Sponsoredtc pixel