MERRIMACK PHARMACEUTICALS IN's ticker is MACK and the CUSIP is 590328209. A total of 52 filers reported holding MERRIMACK PHARMACEUTICALS IN in Q1 2023. The put-call ratio across all filers is 0.61 and the average weighting 0.5%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2023 | $23 | -66.7% | 1,845 | -67.2% | 0.00% | – |
| Q2 2023 | $69 | +3.0% | 5,617 | +3.3% | 0.00% | – |
| Q1 2023 | $67 | +3250.0% | 5,438 | +3928.1% | 0.00% | – |
| Q4 2022 | $2 | -99.9% | 135 | -57.8% | 0.00% | – |
| Q1 2021 | $2,000 | – | 320 | +3900.0% | 0.00% | – |
| Q4 2019 | $0 | – | 8 | -84.0% | 0.00% | – |
| Q3 2019 | $0 | – | 50 | 0.0% | 0.00% | – |
| Q2 2019 | $0 | – | 50 | 0.0% | 0.00% | – |
| Q1 2019 | $0 | – | 50 | 0.0% | 0.00% | – |
| Q4 2018 | $0 | -100.0% | 50 | -93.3% | 0.00% | – |
| Q3 2018 | $4,000 | -95.7% | 750 | -96.0% | 0.00% | – |
| Q2 2018 | $92,000 | +338.1% | 18,714 | +599.6% | 0.00% | – |
| Q1 2018 | $21,000 | -16.0% | 2,675 | +9.4% | 0.00% | – |
| Q4 2017 | $25,000 | +525.0% | 2,445 | +720.5% | 0.00% | – |
| Q3 2017 | $4,000 | – | 298 | – | 0.00% | – |
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Other shareholders
| Name | Shares | Value | Weighting ↓ |
|---|---|---|---|
| Western Standard LLC | 1,894,013 | $23,353,180 | 21.09% |
| Newtyn Management, LLC | 1,873,694 | $23,102,647 | 5.70% |
| Sio Capital Management, LLC | 288,466 | $3,556,786 | 1.10% |
| Madison Avenue Partners, LP | 553,085 | $6,819,538 | 0.97% |
| WITTENBERG INVESTMENT MANAGEMENT, INC. | 209,739 | $2,586 | 0.95% |
| Indaba Capital Management, L.P. | 136,802 | $1,686,769 | 0.50% |
| Sepio Capital, LP | 306,680 | $3,781,364 | 0.33% |
| Yakira Capital Management, Inc. | 54,118 | $667,275 | 0.18% |
| Centiva Capital, LP | 187,803 | $2,315,611 | 0.05% |
| FIFTH LANE CAPITAL, LP | 10,929 | $134,427 | 0.05% |