| Amount | Holding |
|---|---|
| 12.37% | Williams |
| 10.77% | ONEOK Inc |
| 9.47% | Plains GP Holdings LP Class A |
| 8.70% | Kinder Morgan, Inc. (OLD) |
| 8.23% | TC Energy Corp |
| 7.55% | Enterprise Products Partners LP |
| 7.26% | Enbridge Inc |
| 6.80% | Pembina Pipeline Corp |
| 6.18% | Targa Resources Corp |
| 6.17% | KNOT Offshore Partners LP |