MERRIMACK PHARMACEUTICALS IN's ticker is MACK and the CUSIP is 590328209. A total of 41 filers reported holding MERRIMACK PHARMACEUTICALS IN in Q4 2020. The put-call ratio across all filers is 0.18 and the average weighting 0.3%.
Quarter-by-quarter ownership
| Value | Shares | Weighting | ||||
|---|---|---|---|---|---|---|
| Q3 2020 | $11,000 | +22.2% | 2,700 | -3.6% | 0.00% | – |
| Q2 2020 | $9,000 | -57.1% | 2,800 | -58.2% | 0.00% | -100.0% |
| Q4 2019 | $21,000 | -64.4% | 6,699 | -49.1% | 0.00% | -66.7% |
| Q3 2019 | $59,000 | +1.7% | 13,154 | +37.0% | 0.00% | 0.0% |
| Q2 2019 | $58,000 | +65.7% | 9,600 | +92.0% | 0.00% | +50.0% |
| Q1 2019 | $35,000 | -5.4% | 5,000 | +8.7% | 0.00% | -33.3% |
| Q1 2018 | $37,000 | – | 4,600 | – | 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% |