22NW LP 13D and 13G filings for Merrimack Pharmaceuticals, 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 |
| 2022-02-14 12:50 pm Unchanged | 2021-12-31 | 13G | Merrimack Pharmaceuticals, Inc. MACK | 22NW LP | 1,241,896 9.300% | 0 (Unchanged) | Filing |
| 2021-02-12 4:01 pm Purchase | 2020-12-31 | 13G | Merrimack Pharmaceuticals, Inc. MACK | 22NW LP | 1,241,896 9.280% | 289,533 (+30.40%) | Filing |