| 2019-09-05 | Sale | Antero Midstream Corporation AM | 2.93M 0.5504% | $6.81 | $19.93M | -10% | ||
| 2019-05-21 | Sale | Antero Midstream Corporation AM | 1.02M 0.1903% | $12.61 | $12.8M | -45.18% | ||
| 2006-02-22 | Hallador Energy Company HNRG | 10 percent owner | 5.45M 36.302% | $2.20 | $12M | +25% |