Real time insider trading transaction history:
- Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
Common stock purchase or sale:
| Transaction Date | Reported DateTime | Company | Symbol | Insider Relationship | Shares Traded | Average Price | Total Amount | Shares Owned | Filing |
| 2025-10-27 Sale | 2025-10-28 4:10 pm | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 77 | $9.9 | $762 | 2,922 (Direct) | View |
| 2025-09-12 Sale | 2025-09-15 4:26 pm | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 2,012 | $7.31 | $14,708 | 22,912 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:27 pm | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 3,554 | $0.58 | $2,061 | 161,687 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:26 pm | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 8,637 | $0.58 | $5,009 | 480,548 (Indirect Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:25 pm | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 8,048 | $0.58 | $4,668 | 593,090 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:21 pm | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 4,514 | $0.58 | $2,618 | 1,153,763 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:20 pm | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 8,470 | $0.58 | $4,913 | 508,893 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:18 pm | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 5,096 | $0.58 | $2,956 | 413,713 (Direct) | View |
| 2025-01-16 Sale | 2025-01-17 7:18 pm | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 5,939 | $0.58 | $3,445 | 456,372 (Direct) | View |
| 2025-01-15 Sale | 2025-01-16 5:25 pm | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 6,191 | $0.63 | $3,900 | 484,685 (Indirect Direct) | View |
| 2025-01-15 Sale | 2025-01-16 5:25 pm | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 1,791 | $0.63 | $1,128 | 57,171 (Direct) | View |
| 2025-01-15 Sale | 2025-01-16 5:24 pm | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 1,794 | $0.63 | $1,130 | 250,721 (Direct) | View |
| 2025-01-15 Sale | 2025-01-16 5:23 pm | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 2,331 | $0.63 | $1,469 | 115,280 (Direct) | View |
| 2025-01-15 Sale | 2025-01-16 5:23 pm | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 952 | $0.63 | $600 | 73,392 (Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:20 pm | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 11,534 | $0.66 | $7,612 | 519,876 (Indirect Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:19 pm | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 1,007 | $0.66 | $665 | 54,688 (Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:18 pm | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 3,483 | $0.66 | $2,299 | 261,682 (Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:17 pm | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 3,713 | $0.66 | $2,451 | 125,111 (Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:17 pm | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 3,330 | $0.66 | $2,198 | 87,261 (Direct) | View |
| 2025-01-14 Sale | 2025-01-15 9:16 pm | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 3,253 | $0.66 | $2,147 | 77,728 (Direct) | View |
Stock options: Exercise, Award, Grant, Conversion
| Transaction Date | Reported DateTime | Exercisable Expiration | Company | Symnbol | Insider Relationship | Shares Traded | Conversion Price | Shares Owned | Filing |
| 2026-01-06 Equity Swap | 2026-01-06 6:32 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Hack Andrew A. F. Director | 347,123 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:55 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Hege Kristen Director | 578 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:54 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Diaz Allene M. Director | 578 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:52 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Dere Willard H Director | 1,567 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:51 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 3,131 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:49 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development | 2,927 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:48 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Alleva Lawrence M Director | 662 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:47 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 9,573 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:44 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 2,300 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:42 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 19,220 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:40 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 10,466 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:39 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | MOTT DAVID M Director | 23,929 | $0 | 0 (Direct) | View |
| 2026-01-06 Equity Swap | 2026-01-06 4:38 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 5,015 | $0 | 0 (Direct) | View |
| 2025-10-25 Exercise | 2025-10-28 4:10 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 250 | $0 | 2,922 (Direct) | View |
| 2025-09-11 Exercise | 2025-09-15 4:26 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 6,670 | $0 | 22,912 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 5:15 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Alleva Lawrence M Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 5:10 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Hack Andrew A. F. Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 5:02 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Dere Willard H Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 5:00 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Diaz Allene M. Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 4:58 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 4:57 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | Hege Kristen Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-06-12 Option Award | 2025-06-13 4:55 pm | N/A 2035-06-11 | Mersana Therapeutics Inc. | MRSN | MOTT DAVID M Director | 61,500 | $0 | 61,500 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:27 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 91,667 | $0 | 161,687 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:27 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 8,685 | $0 | 161,687 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:26 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 21,250 | $0 | 480,548 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:25 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 297,917 | $0 | 593,090 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:25 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 19,791 | $0 | 593,090 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:21 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 997,700 | $0 | 1,153,763 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:21 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Huber Martin H. Jr. President, CEO | 11,062 | $0 | 1,153,763 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:20 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 343,750 | $0 | 508,893 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:20 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 20,833 | $0 | 508,893 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:18 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 297,917 | $0 | 413,713 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:18 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 12,500 | $0 | 413,713 (Direct) | View |
| 2025-01-15 Option Award | 2025-01-17 7:18 pm | N/A 2035-01-14 | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 343,750 | $0 | 456,372 (Direct) | View |
| 2025-01-15 Exercise | 2025-01-17 7:18 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 14,583 | $0 | 456,372 (Direct) | View |
| 2025-01-14 Exercise | 2025-01-16 5:25 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 16,750 | $0 | 484,685 (Direct) | View |
| 2025-01-14 Exercise | 2025-01-16 5:25 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 4,783 | $0 | 57,171 (Direct) | View |
| 2025-01-14 Exercise | 2025-01-16 5:24 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 4,792 | $0 | 250,721 (Direct) | View |
| 2025-01-14 Exercise | 2025-01-16 5:23 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 6,250 | $0 | 115,280 (Direct) | View |
| 2025-01-14 Exercise | 2025-01-16 5:23 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 2,500 | $0 | 73,392 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:20 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Protopapas Anna Director | 31,250 | $0 | 519,876 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:19 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Mandelia Ashish VP, Chief Accounting Officer | 2,646 | $0 | 54,688 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:18 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Lowinger Timothy B SVP, Chief Sci.&Tech. Officer | 9,375 | $0 | 261,682 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:17 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | DeSchuytner Brian SVP, COO & CFO | 10,000 | $0 | 125,111 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:17 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Carvajal Alejandra SVP, Chief Legal Officer | 8,958 | $0 | 87,261 (Direct) | View |
| 2025-01-13 Exercise | 2025-01-15 9:16 pm | N/A N/A | Mersana Therapeutics Inc. | MRSN | Bala Mohan SVP, Chief Development Officer | 8,750 | $0 | 77,728 (Direct) | View |