LIVE FROM THE DATABASETRANSACTIONS 362,430COMPANIES 5,763LATEST TRADE Oct 16UPDATED Oct 17, 12:31 AM
MRSNCIK 0001442836

Mersana Therapeutics, Inc.

216 transactions by 13 insiders, from October 25, 2025 to January 6, 2026.

Transactions
21613 insiders
Bought · P
Nonenobody bought on the open market
Sold · S
$762open market
Net
−$762net selling

Officers and directors

People inside the company. What they do with their own shares is the reason this data exists.

InsiderTradesPlannedBoughtSold
Lawrence M. AllevaDir24———
Timothy B. LowingerChief22———
Anna ProtopapasDir20———
Brian DeSchuytnerCFO19———
Martin H. Huber Jr.CEO19———
Ashish MandeliaCAO18———
Kristen HegeDir18———
Mohan BalaChief153/15—$762
David M. MottDir15———
Alejandra CarvajalGC13———
Willard H. DereDir13———
Andrew A. F. HackDir13———
Allene M. DiazDir7———

All transactions

216 in total, newest filings first.

InsiderDateCodeSharesPriceValue
Anna ProtopapasDirDERIVJan 6D166——
Anna ProtopapasDirDERIVJan 6D5,227——
Anna ProtopapasDirDERIVJan 6D1,131——
Anna ProtopapasDirDERIVJan 6D2,200——
Anna ProtopapasDirDERIVJan 6D11,250——
Anna ProtopapasDirDERIVJan 6D9,043——
Anna ProtopapasDirDERIVJan 6D665——
Anna ProtopapasDirDERIVJan 6D11,761——
Anna ProtopapasDirDERIVJan 6D988——
Anna ProtopapasDirDERIVJan 6D18——
Anna ProtopapasDirDERIVJan 6D1——
Anna ProtopapasDirDERIVJan 6D8,137——
Anna ProtopapasDirDERIVJan 6D542——
Anna ProtopapasDirDERIVJan 6D7,519——
Anna ProtopapasDirDERIVJan 6D480——
Anna ProtopapasDirDERIVJan 6D2,500——
Anna ProtopapasDirDERIVJan 6D2,460——
Anna ProtopapasDirJan 6U9,609——
Anna ProtopapasDirJan 6U2,890——
Anna ProtopapasDirJan 6U6,721——
Ashish MandeliaCAODERIVJan 6D666——
Ashish MandeliaCAODERIVJan 6D500——
Ashish MandeliaCAODERIVJan 6D212——
Ashish MandeliaCAODERIVJan 6D192——
Ashish MandeliaCAODERIVJan 6D1,842——
Ashish MandeliaCAODERIVJan 6D1,157——
Ashish MandeliaCAODERIVJan 6D1,183——
Ashish MandeliaCAODERIVJan 6D722——
Ashish MandeliaCAODERIVJan 6D788——
Ashish MandeliaCAODERIVJan 6D359——
Ashish MandeliaCAODERIVJan 6D773——
Ashish MandeliaCAODERIVJan 6D310——
Ashish MandeliaCAODERIVJan 6D44——
Ashish MandeliaCAODERIVJan 6D555——
Ashish MandeliaCAODERIVJan 6D2,870——
Ashish MandeliaCAODERIVJan 6D1,312——
Ashish MandeliaCAODERIVJan 6D1,687——
Ashish MandeliaCAOJan 6U2,300——
David M. MottDirDERIVJan 6D2,200——
David M. MottDirDERIVJan 6D734——
David M. MottDirDERIVJan 6D1,800——
David M. MottDirDERIVJan 6D740——
David M. MottDirDERIVJan 6D1,002——
David M. MottDirDERIVJan 6D181——
David M. MottDirDERIVJan 6D368——
David M. MottDirDERIVJan 6D788——
David M. MottDirDERIVJan 6D1,000——
David M. MottDirDERIVJan 6D1,011——
David M. MottDirDERIVJan 6D400——
David M. MottDirDERIVJan 6D264——
David M. MottDirDERIVJan 6D2,460——
David M. MottDirJan 6U383——
David M. MottDirJan 6U23,546——
Timothy B. LowingerChiefDERIVJan 6D2,166——
Timothy B. LowingerChiefDERIVJan 6D1,500——
Timothy B. LowingerChiefDERIVJan 6D750——
Timothy B. LowingerChiefDERIVJan 6D192——
Timothy B. LowingerChiefDERIVJan 6D1,834——
Timothy B. LowingerChiefDERIVJan 6D7,959——
Timothy B. LowingerChiefDERIVJan 6D1,040——
Timothy B. LowingerChiefDERIVJan 6D5,891——
Timothy B. LowingerChiefDERIVJan 6D858——
Timothy B. LowingerChiefDERIVJan 6D3,234——
Timothy B. LowingerChiefDERIVJan 6D215——
Timothy B. LowingerChiefDERIVJan 6D4,974——
Timothy B. LowingerChiefDERIVJan 6D275——
Timothy B. LowingerChiefDERIVJan 6D3,090——
Timothy B. LowingerChiefDERIVJan 6D920——
Timothy B. LowingerChiefDERIVJan 6D419——
Timothy B. LowingerChiefDERIVJan 6D713——
Timothy B. LowingerChiefDERIVJan 6D1,578——
Timothy B. LowingerChiefDERIVJan 6D696——
Timothy B. LowingerChiefDERIVJan 6D6,702——
Timothy B. LowingerChiefDERIVJan 6D3,047——
Timothy B. LowingerChiefJan 6U10,466——
Martin H. Huber Jr.CEODERIVJan 6D7,256——
Martin H. Huber Jr.CEODERIVJan 6D1,328——
Martin H. Huber Jr.CEODERIVJan 6D13,340——
Martin H. Huber Jr.CEODERIVJan 6D7,467——
Martin H. Huber Jr.CEODERIVJan 6D497——
Martin H. Huber Jr.CEODERIVJan 6D364——
Martin H. Huber Jr.CEODERIVJan 6D27,878——
Martin H. Huber Jr.CEODERIVJan 6D12,121——
Martin H. Huber Jr.CEODERIVJan 6D179——
Martin H. Huber Jr.CEODERIVJan 6D734——
Martin H. Huber Jr.CEODERIVJan 6D135——
Martin H. Huber Jr.CEODERIVJan 6D1,800——
Martin H. Huber Jr.CEODERIVJan 6D407——
Martin H. Huber Jr.CEODERIVJan 6D1,002——
Martin H. Huber Jr.CEODERIVJan 6D99——
Martin H. Huber Jr.CEODERIVJan 6D1,923——
Martin H. Huber Jr.CEODERIVJan 6D26,713——
Martin H. Huber Jr.CEODERIVJan 6D5,938——
Martin H. Huber Jr.CEOJan 6U9,573——
Kristen HegeDirDERIVJan 6D2,088——
Kristen HegeDirDERIVJan 6D2,200——
Kristen HegeDirDERIVJan 6D257——
Kristen HegeDirDERIVJan 6D380——
Kristen HegeDirDERIVJan 6D146——
Kristen HegeDirDERIVJan 6D734——
Kristen HegeDirDERIVJan 6D138——
Kristen HegeDirDERIVJan 6D1,800——
Kristen HegeDirDERIVJan 6D416——
Kristen HegeDirDERIVJan 6D1,002——
Kristen HegeDirDERIVJan 6D101——
Kristen HegeDirDERIVJan 6D368——
Kristen HegeDirDERIVJan 6D450——
Kristen HegeDirDERIVJan 6D1,000——
Kristen HegeDirDERIVJan 6D400——
Kristen HegeDirDERIVJan 6D142——
Kristen HegeDirDERIVJan 6D2,460——
Kristen HegeDirJan 6U578——
Andrew A. F. HackDirDERIVJan 6D2,200——
Andrew A. F. HackDirDERIVJan 6D734——
Andrew A. F. HackDirDERIVJan 6D1,800——
Andrew A. F. HackDirDERIVJan 6D439——
Andrew A. F. HackDirDERIVJan 6D1,002——
Andrew A. F. HackDirDERIVJan 6D118——
Andrew A. F. HackDirDERIVJan 6D368——
Andrew A. F. HackDirDERIVJan 6D1,000——
Andrew A. F. HackDirDERIVJan 6D400——
Andrew A. F. HackDirDERIVJan 6D2,088——
Andrew A. F. HackDirDERIVJan 6D2,460——
Andrew A. F. HackDirJan 6U346,545——
Andrew A. F. HackDirJan 6U578——
Allene M. DiazDirDERIVJan 6D2,200——
Allene M. DiazDirDERIVJan 6D734——
Allene M. DiazDirDERIVJan 6D1,800——
Allene M. DiazDirDERIVJan 6D416——
Allene M. DiazDirDERIVJan 6D1,571——
Allene M. DiazDirDERIVJan 6D2,460——
Allene M. DiazDirJan 6U578——
Willard H. DereDirDERIVJan 6D2,200——
Willard H. DereDirDERIVJan 6D734——
Willard H. DereDirDERIVJan 6D1,800——
Willard H. DereDirDERIVJan 6D513——
Willard H. DereDirDERIVJan 6D1,002——
Willard H. DereDirDERIVJan 6D125——
Willard H. DereDirDERIVJan 6D368——
Willard H. DereDirDERIVJan 6D450——
Willard H. DereDirDERIVJan 6D1,000——
Willard H. DereDirDERIVJan 6D544——
Willard H. DereDirDERIVJan 6D800——
Willard H. DereDirDERIVJan 6D2,460——
Willard H. DereDirJan 6U1,567——
Brian DeSchuytnerCFODERIVJan 6D2,500——
Brian DeSchuytnerCFODERIVJan 6D1,750——
Brian DeSchuytnerCFODERIVJan 6D800——
Brian DeSchuytnerCFODERIVJan 6D250——
Brian DeSchuytnerCFODERIVJan 6D9,422——
Brian DeSchuytnerCFODERIVJan 6D1,077——
Brian DeSchuytnerCFODERIVJan 6D6,381——
Brian DeSchuytnerCFODERIVJan 6D818——
Brian DeSchuytnerCFODERIVJan 6D4,218——
Brian DeSchuytnerCFODERIVJan 6D281——
Brian DeSchuytnerCFODERIVJan 6D4,172——
Brian DeSchuytnerCFODERIVJan 6D327——
Brian DeSchuytnerCFODERIVJan 6D2,671——
Brian DeSchuytnerCFODERIVJan 6D178——
Brian DeSchuytnerCFODERIVJan 6D5,590——
Brian DeSchuytnerCFODERIVJan 6D4,009——
Brian DeSchuytnerCFODERIVJan 6D7,734——
Brian DeSchuytnerCFODERIVJan 6D3,515——
Brian DeSchuytnerCFOJan 6U5,015——
Alejandra CarvajalGCDERIVJan 6D2,166——
Alejandra CarvajalGCDERIVJan 6D1,500——
Alejandra CarvajalGCDERIVJan 6D717——
Alejandra CarvajalGCDERIVJan 6D100——
Alejandra CarvajalGCDERIVJan 6D7,921——
Alejandra CarvajalGCDERIVJan 6D1,078——
Alejandra CarvajalGCDERIVJan 6D4,922——
Alejandra CarvajalGCDERIVJan 6D1,527——
Alejandra CarvajalGCDERIVJan 6D1,800——
Alejandra CarvajalGCDERIVJan 6D4,500——
Alejandra CarvajalGCDERIVJan 6D6,702——
Alejandra CarvajalGCDERIVJan 6D3,047——
Alejandra CarvajalGCJan 6U3,131——
Mohan BalaChiefDERIVJan 6D2,500——
Mohan BalaChiefDERIVJan 6D1,750——
Mohan BalaChiefDERIVJan 6D700——
Mohan BalaChiefDERIVJan 6D9,309——
Mohan BalaChiefDERIVJan 6D1,190——
Mohan BalaChiefDERIVJan 6D5,246——
Mohan BalaChiefDERIVJan 6D1,053——
Mohan BalaChiefDERIVJan 6D2,646——
Mohan BalaChiefDERIVJan 6D1,853——
Mohan BalaChiefDERIVJan 6D7,734——
Mohan BalaChiefDERIVJan 6D3,515——
Mohan BalaChiefJan 6U2,927——
Lawrence M. AllevaDirDERIVJan 6D500——
Lawrence M. AllevaDirDERIVJan 6D384——
Lawrence M. AllevaDirDERIVJan 6D358——
Lawrence M. AllevaDirDERIVJan 6D2,200——
Lawrence M. AllevaDirDERIVJan 6D159——
Lawrence M. AllevaDirDERIVJan 6D310——
Lawrence M. AllevaDirDERIVJan 6D561——
Lawrence M. AllevaDirDERIVJan 6D215——
Lawrence M. AllevaDirDERIVJan 6D734——
Lawrence M. AllevaDirDERIVJan 6D181——
Lawrence M. AllevaDirDERIVJan 6D1,800——