WallStreetZenWallStreetZen

NASDAQ: MRSN
Mersana Therapeutics Inc Stock Ownership - Who owns Mersana Therapeutics?

OverviewForecastEarningsRevenueDividendOwnership

Insider buying vs selling

Have Mersana Therapeutics Inc insiders been buying or selling?

Buy
Sell
NameRoleDateSharesPriceValue
Martin H. Huber Jr.President CEO2025-09-122,012$7.31
$14.71kSell
Anna ProtopapasDirector2025-01-168,637$0.58
$5.01kSell
Mohan BalaSVP Chief Development Officer2025-01-165,939$0.58
$3.44kSell
Alejandra CarvajalSVP Chief Legal Officer2025-01-165,096$0.58
$2.96kSell
Brian DeschuytnerSVP COO CFO2025-01-168,470$0.58
$4.91kSell
Martin H. Huber Jr.President CEO2025-01-164,514$0.58
$2.62kSell
Timothy B. LowingerSVP Chief Sci.Tech. Officer2025-01-168,048$0.58
$4.67kSell
Ashish MandeliaVP Chief Accounting Officer2025-01-163,554$0.58
$2.06kSell
Brian DeschuytnerSVP COO CFO2025-01-152,331$0.63
$1.47kSell
Timothy B. LowingerSVP Chief Sci.Tech. Officer2025-01-151,794$0.63
$1.13kSell

1 of 3

MRSN insiders have sold more... subscribe to Premium to read more.
Net Insider Buy/Sell (L12M) Ownership

Be the first to know when MRSN insiders and whales buy or sell their stock.

MRSN Shareholders

What type of owners hold Mersana Therapeutics Inc stock?

Institutional
Insider
Retail
NameHoldSharesValueType
Ecor1 Capital LLC615.00%30,692,688$221.29MInsider
Anthony A. Florence Jr.282.79%14,113,128$101.76MInsider
Patrick J. Kerins282.59%14,103,252$101.68MInsider
Forest Baskett279.20%13,934,092$100.46MInsider
Scott D. Sandell279.17%13,932,603$100.45MInsider
Peter W. Sonsini278.95%13,921,527$100.37MInsider
David M. Mott250.43%12,498,022$90.11MInsider
Nextech Invest Ltd241.80%12,067,246$87.00MInstitution
Crossover I. Scsp Nextech241.80%12,067,246$87.00MInsider
Andrew A. F. Hack173.89%8,678,140$62.57MInsider

1 of 3

MRSN vs Biotech Stocks

TickerInst. %Insider %Net Insider (L12M)Net Insider (L3M)
MRSN30.77%69.23%Net SellingNet Selling
SNTI20.78%79.22%Net Buying
MURA47.52%13.44%Net SellingNet Selling
ANTX27.41%72.59%Net Selling
DYAI8.67%91.33%Net BuyingNet Buying
View Top Biotech Stocks

Mersana Therapeutics Stock Ownership FAQ

Who owns Mersana Therapeutics?

Mersana Therapeutics (NASDAQ: MRSN) is owned by 1,551.47% institutional shareholders, 3,491.41% Mersana Therapeutics insiders, and 0.00% retail investors. Ecor1 Capital LLC is the largest individual Mersana Therapeutics shareholder, owning 30.69M shares representing 615.00% of the company. Ecor1 Capital LLC's Mersana Therapeutics shares are currently valued at $219.45M.

If you're new to stock investing, here's how to buy Mersana Therapeutics stock.
©2025 WallStreetZen
Company
AboutNewsBlogStock Investing FAQPlansPrivacy PolicyTerms of ServiceCancellation & RefundsPerformanceHelp GuidesContactTwitterYouTubeNewsletter
Stock Tools
Top Performing AnalystsStock ScreenerStock ForecastTrending StocksStrong Buy StocksHighest Earnings StocksBest Dividend Paying StocksStatisticsStock Market SectorsStock Market IndustriesHow to Buy Stocks Online
Stock Ideas
Buy The DipBiggest Stock Gainers TodayBiggest Stock Losers Today52 Week High Stocks52 Week Low StocksMost Active Stocks TodayMost Undervalued StocksBest Penny Stocks to Buy NowBest Stocks Under $5Best Stocks Under $10
WallStreetZen does not provide financial advice and does not issue recommendations or offers to buy stock or sell any security.

Information is provided 'as-is' and solely for informational purposes and is not advice. WallStreetZen does not bear any responsibility for any losses or damage that may occur as a result of reliance on this data.