14 insiders reported 62 Form 4 transactions for Mersana Therapeutics, Inc. (MRSN) over the past 18 months (most recent 2026-01-06). Recent activity: Protopapas Anna (Director) Sell 6,721 shares, Alleva Lawrence M (Director) Sell 84 shares, Protopapas Anna (Director) Sell 9,609 shares, Mandelia Ashish (VP, Chief Accounting Officer) Sell 2,300 shares, Hege Kristen (Director) Sell 578 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-06 | Protopapas Anna | Director | Sell | 6,721 | $0 |
| 2026-01-06 | Alleva Lawrence M | Director | Sell | 84 | $0 |
| 2026-01-06 | Protopapas Anna | Director | Sell | 9,609 | $0 |
| 2026-01-06 | Mandelia Ashish | VP, Chief Accounting Officer | Sell | 2,300 | $0 |
| 2026-01-06 | Hege Kristen | Director | Sell | 578 | $0 |
| 2026-01-06 | MOTT DAVID M | Director | Sell | 23,546 | $0 |
| 2026-01-06 | MOTT DAVID M | Director | Sell | 383 | $0 |
| 2026-01-06 | Protopapas Anna | Director | Sell | 2,890 | $0 |
| 2026-01-06 | Hack Andrew A. F. | Director | Sell | 578 | $0 |
| 2026-01-06 | Hack Andrew A. F. | Director | Sell | 346,545 | $0 |
| 2026-01-06 | Carvajal Alejandra | SVP, Chief Legal Officer | Sell | 3,131 | $0 |
| 2026-01-06 | Lowinger Timothy B | SVP, Chief Sci.&Tech. Officer | Sell | 10,466 | $0 |
| 2026-01-06 | Bala Mohan | SVP, Chief Development | Sell | 2,927 | $0 |
| 2026-01-06 | Dere Willard H | Director | Sell | 1,567 | $0 |
| 2026-01-06 | Diaz Allene M. | Director | Sell | 578 | $0 |
| 2026-01-06 | DeSchuytner Brian | SVP, COO & CFO | Sell | 5,015 | $0 |
| 2026-01-06 | Alleva Lawrence M | Director | Sell | 578 | $0 |
| 2026-01-06 | Huber Martin H. Jr. | President, CEO | Sell | 9,573 | $0 |
| 2025-10-28 | Bala Mohan | SVP, Chief Development Officer | Buy | 250 | $0 |
| 2025-10-28 | Bala Mohan | SVP, Chief Development Officer | Sell | 77 | $762 |
| 2025-09-15 | Huber Martin H. Jr. | President, CEO | Buy | 6,670 | $0 |
| 2025-09-15 | Huber Martin H. Jr. | President, CEO | Sell | 2,012 | $14,708 |
| 2025-01-17 | Mandelia Ashish | VP, Chief Accounting Officer | Sell | 3,554 | $2,061 |
| 2025-01-17 | Mandelia Ashish | VP, Chief Accounting Officer | Buy | 4,519 | $0 |
| 2025-01-17 | Mandelia Ashish | VP, Chief Accounting Officer | Buy | 4,166 | $0 |
Source: SEC Form 4 filings · as of 2026-01-06
