Mersana Therapeutics, Inc. - 59045L106
All tracked SEC files for this issuer. Showing up to 200 latest records.
Need parsed ownership details (13D/13G with shares/percent)?
Open ownership details
Form 4 = insider transactions report. Form 144 = notice of proposed sale (not a completed trade confirmation).
Files summary
Total files loaded: 20
Latest filed: May 15, 2026
| Form | Count |
|---|---|
| 4 | 13 |
| SCHEDULE 13G/A | 5 |
| SCHEDULE 13D/A | 1 |
| 8-K | 1 |
Latest files
| Filed | Form | Report period | Accession | SEC |
|---|---|---|---|---|
| May 15, 2026 | SCHEDULE 13G/A | — | 0001404574-26-000016 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | — | 0001404574-26-000005 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | — | 0001193805-26-000140 | View |
| Jan 30, 2026 | SCHEDULE 13G/A | — | 0000102909-26-000157 | View |
| Jan 09, 2026 | SCHEDULE 13G/A | — | 0001916761-26-000002 | View |
| Jan 08, 2026 | SCHEDULE 13D/A | — | 0001193125-26-007752 | View |
| Jan 06, 2026 | 8-K | Jan 05, 2026 | 0001104659-26-001125 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001365 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001368 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001371 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001374 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001375 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001376 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001377 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001379 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001380 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001382 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001385 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001104659-26-001389 | View |
| Jan 06, 2026 | 4 | Jan 06, 2026 | 0001193125-26-004925 | View |