Insider Transactions Reported by 18 Insiders of Mersana Therapeutics, Inc.

Location
Cambridge, MA

Insiders trading volume in the past year

Mersana Therapeutics, Inc. executives and other stock owners filed with the SEC include:

Name Relationship Holdings Value Past Year Net Change Change % Report Date
Crossover I. Scsp Nextech 10%+ Owner $22,927,767 20 Dec 2024
EcoR1 Capital, LLC 10%+ Owner $21,523,200 19 Dec 2024
Brian DeSchuytner Svp, Coo & Cfo $194,332 06 Jan 2026
Timothy B. Lowinger SVP, Chief Sci.&Tech. Officer $166,917 06 Jan 2026
Alejandra Carvajal SVP, Chief Legal Officer $166,917 06 Jan 2026
Tushar Misra SVP, Chief Manuf. Officer $161,606 13 Jan 2024
Arvin Yang SVP, Chief Medical Officer $141,110 13 Jan 2023
Martin H. Huber Jr. President, CEO, Director $105,212 -$14,708 -12% 06 Jan 2026
Michael J. Kaufman Chief Manufacturing Officer $88,406 15 Jul 2021
Ashish Mandelia VP, Chief Accounting Officer $54,835 06 Jan 2026
Mohan Bala SVP, Chief Development $39,375 -$762 -1.9% 06 Jan 2026
Allene M. Diaz Director $0 06 Jan 2026
Kristen Hege Director $0 06 Jan 2026
Anna Protopapas Director $0 06 Jan 2026
David M. Mott Director $0 06 Jan 2026
Lawrence M. Alleva Director $0 06 Jan 2026
Willard H. Dere Director $0 06 Jan 2026
Andrew A. F. Hack Director $0 06 Jan 2026

Recent Insider Transactions by Companies or Individuals for Mersana Therapeutics, Inc.

Showing up to 300 most recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % Value $ * Price $ Shares Shares Owned Date Ownership
Andrew A. F. Hack MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -346,545 0 06 Jan 2026 See Footnote
Andrew A. F. Hack MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -578 0 06 Jan 2026 Direct
Andrew A. F. Hack MRSN Stock Option (right to buy) Disposed to Issuer -100% -12,609 0 06 Jan 2026 Direct
Kristen Hege MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -578 0 06 Jan 2026 Direct
Kristen Hege MRSN Stock Option (right to buy) Disposed to Issuer -100% -14,082 0 06 Jan 2026 Direct
Allene M. Diaz MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -578 0 06 Jan 2026 Direct
Allene M. Diaz MRSN Stock Option (right to buy) Disposed to Issuer -100% -9,181 0 06 Jan 2026 Direct
Willard H. Dere MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -1,567 0 06 Jan 2026 Direct
Willard H. Dere MRSN Stock Option (right to buy) Disposed to Issuer -100% -11,996 0 06 Jan 2026 Direct
Alejandra Carvajal MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -3,131 0 06 Jan 2026 Direct
Alejandra Carvajal MRSN Restricted Stock Units Disposed to Issuer -100% -4,483 0 06 Jan 2026 Direct
Alejandra Carvajal MRSN Stock Option (right to buy) Disposed to Issuer -100% -31,497 0 06 Jan 2026 Direct
Mohan Bala MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -2,927 0 06 Jan 2026 Direct
Mohan Bala MRSN Restricted Stock Units Disposed to Issuer -100% -4,950 0 06 Jan 2026 Direct
Mohan Bala MRSN Stock Option (right to buy) Disposed to Issuer -100% -32,546 0 06 Jan 2026 Direct
Lawrence M. Alleva MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -84 0 06 Jan 2026 See Footnote
Lawrence M. Alleva MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -578 0 06 Jan 2026 Direct
Lawrence M. Alleva MRSN Stock Option (right to buy) Disposed to Issuer -100% -15,247 0 06 Jan 2026 Direct
Martin H. Huber Jr. MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -9,573 0 06 Jan 2026 Direct
Martin H. Huber Jr. MRSN Restricted Stock Units Disposed to Issuer -100% -21,924 0 06 Jan 2026 Direct
Martin H. Huber Jr. MRSN Stock Option (right to buy) Disposed to Issuer -100% -87,257 0 06 Jan 2026 Direct
Ashish Mandelia MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -2,300 0 06 Jan 2026 Direct
Ashish Mandelia MRSN Restricted Stock Units Disposed to Issuer -100% -1,570 0 06 Jan 2026 Direct
Ashish Mandelia MRSN Stock Option (right to buy) Disposed to Issuer -100% -13,602 0 06 Jan 2026 Direct
Anna Protopapas MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -12,499 0 06 Jan 2026 See footnote
Anna Protopapas MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -6,721 0 06 Jan 2026 Direct
Anna Protopapas MRSN Stock Option (right to buy) Disposed to Issuer -100% -64,088 0 06 Jan 2026 Direct
Timothy B. Lowinger MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -10,466 0 06 Jan 2026 Direct
Timothy B. Lowinger MRSN Restricted Stock Units Disposed to Issuer -100% -4,608 0 06 Jan 2026 Direct
Timothy B. Lowinger MRSN Stock Option (right to buy) Disposed to Issuer -100% -43,445 0 06 Jan 2026 Direct
David M. Mott MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -383 0 06 Jan 2026 See Footnote
David M. Mott MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -23,546 0 06 Jan 2026 Direct
David M. Mott MRSN Stock Option (right to buy) Disposed to Issuer -100% -12,948 0 06 Jan 2026 Direct
Brian DeSchuytner MRSN Common Stock Disposition pursuant to a tender of shares in a change of control transaction -100% -5,015 0 06 Jan 2026 Direct
Brian DeSchuytner MRSN Restricted Stock Units Disposed to Issuer -100% -5,300 0 06 Jan 2026 Direct
Brian DeSchuytner MRSN Stock Option (right to buy) Disposed to Issuer -100% -50,393 0 06 Jan 2026 Direct
Mohan Bala MRSN Common Stock Sale -2.57% $762 $9.90 -77 2,922 27 Oct 2025 Direct
Mohan Bala MRSN Common Stock Options Exercise 9.09% 250 2,999 25 Oct 2025 Direct
Mohan Bala MRSN Restricted Stock Unit Options Exercise -100% -250 0 25 Oct 2025 Direct
Martin H. Huber Jr. MRSN Common Stock Sale -17.4% $14,708 $7.31 -2,012 9,572 12 Sep 2025 Direct
Martin H. Huber Jr. MRSN Common Stock Options Exercise 135.7% 6,670 11,584 11 Sep 2025 Direct
Martin H. Huber Jr. MRSN Restricted Stock Unit Options Exercise -33.3% -6,670 13,340 11 Sep 2025 Direct
Lawrence M. Alleva MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
Andrew A. F. Hack MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
Willard H. Dere MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
Allene M. Diaz MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
Anna Protopapas MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
Kristen Hege MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
David M. Mott MRSN Stock Option (right to buy) Award 61,500 61,500 12 Jun 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.