Western Standard LLC 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 |
| 2023-12-13 4:05 pm Purchase | 2023-12-07 | 13D | Merrimack Pharmaceuticals, Inc. MACK | Western Standard LLC | 2,220,058 15.500% | 228,950 (+11.50%) | Filing |
| 2023-08-14 4:05 pm Purchase | 2022-12-29 | 13D | Merrimack Pharmaceuticals, Inc. MACK | Western Standard LLC | 1,991,108 13.900% | 802,263 (+67.48%) | Filing |
| 2020-12-02 7:21 pm Purchase | 2020-11-24 | 13D | Merrimack Pharmaceuticals, Inc. MACK | Western Standard LLC | 1,188,845 8.900% | 142,217 (+13.59%) | Filing |
| 2020-07-23 8:44 pm Purchase | 2020-07-22 | 13D | Merrimack Pharmaceuticals, Inc. MACK | Western Standard LLC | 1,046,628 7.800% | 203,715 (+24.17%) | Filing |