683 Capital Management LLC 13D and 13G filings for Mersana Therapeutics, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-05-15 10:25 am Sale | 2026-03-31 | 13G | MERSANA THERAPEUTICS INC N MRSN | 683 Capital Management LLC | 0 0.000% | -351,289 (Position Closed) | Filing |
| 2026-02-17 10:09 am Purchase | 2025-12-31 | 13G | MERSANA THERAPEUTICS INC N MRSN | 683 Capital Management LLC | 351,289 7.030% | 77,869 (+28.48%) | Filing |
| 2025-11-24 5:12 pm Purchase | 2025-11-17 | 13G | MERSANA THERAPEUTICS INC N MRSN | 683 Capital Management LLC | 273,420 5.470% | 273,420 (New Position) | Filing |