| 2019-11-12 | Sale | Antero Midstream Corporation AM | director | 2.36M 0.2652% | $3.26 | $7.69M | +6.73% | |
| 2019-05-21 | Sale | Antero Midstream Corporation AM | 2.37M 0.4438% | $12.61 | $29.85M | -45.18% | ||
| 2008-07-21 | Hallador Energy Company HNRG | 10 percent owner | 6.56M 36.214% | $4.00 | $26.25M | +18.57% |