Pfizer 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 |
| 2021-02-12 4:17 pm Sale | 2020-12-31 | 13G | Mersana Therapeutics, Inc. MRSN | PFIZER INC PFE | 0 0.000% | -2,209,631 (Position Closed) | Filing |