VANGUARD GROUP INC 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 |
| 2024-02-13 5:09 pm Purchase |
2023-12-29 | 13G | Mersana Therapeutics, Inc. MRSN |
VANGUARD GROUP INC | 6,237,588 5.170% |
1,788,548 (+40.20%) |
Filing |
| 2023-02-09 11:27 am Purchase |
2022-12-30 | 13G | Mersana Therapeutics, Inc. MRSN |
VANGUARD GROUP INC | 4,449,040 4.460% |
841,609 (+23.33%) |
Filing |
| 2022-02-10 08:27 am Purchase |
2021-12-31 | 13G | Mersana Therapeutics, Inc. MRSN |
VANGUARD GROUP INC | 3,607,431 5.020% |
3,607,431 (New Position) |
Filing |