| XTE | | ANR SE (Louisiana) Physical Basis LD1 | Natural Gas | IEPA | |
| XTB | | ANR SE (Louisiana) Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XTA | | ANR SE (Louisiana) Physical Fixed Price Spot | Natural Gas | IEPA | |
| XTD | | ANR SE (Louisiana) Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XTC | | ANR SE (Louisiana) Physical Gas Daily Spot | Natural Gas | IEPA | |
| XTF | | ANR SE (Louisiana) Physical Inside FERC | Natural Gas | IEPA | |
| XZM | | ANR SW (Oklahoma) Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XZL | | ANR SW (Oklahoma) Physical Fixed Price Spot | Natural Gas | IEPA | |
| XZO | | ANR SW (Oklahoma) Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XZN | | ANR SW (Oklahoma) Physical Gas Daily Spot | Natural Gas | IEPA | |
| XZQ | | ANR SW Physical Inside FERC | Natural Gas | IEPA | |
| XZP | | ANR-SW Physical Basis LD1 | Natural Gas | IEPA | |
| XX0 | | APC ACE Physical Basis LD1 | Natural Gas | IEPA | |
| XW9 | | APC ACE Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XW8 | | APC ACE Physical Fixed Price Spot | Natural Gas | IEPA | |
| XX2 | | APC ACE Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XX1 | | APC ACE Physical Gas Daily Spot | Natural Gas | IEPA | |
| XX4 | | APC ACE Physical Natural Gas Intelligence | Natural Gas | IEPA | |
| XLE | | CG Mainline Physical Basis LD1 | Natural Gas | IEPA | |
| XLB | | CG Mainline Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XLA | | CG Mainline Physical Fixed Price Spot | Natural Gas | IEPA | |
| XLD | | CG Mainline Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XLC | | CG Mainline Physical Gas Daily Spot | Natural Gas | IEPA | |
| XLF | | CG Mainline Physical Inside FERC | Natural Gas | IEPA | |
| XLK | | CG Onshore Physical Basis LD1 | Natural Gas | IEPA | |
| XLH | | CG Onshore Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XLG | | CG Onshore Physical Fixed Price Spot | Natural Gas | IEPA | |
| XLJ | | CG Onshore Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XLI | | CG Onshore Physical Gas Daily Spot | Natural Gas | IEPA | |
| XLL | | CG Onshore Physical Inside FERC | Natural Gas | IEPA | |
| XNX | | Cheyenne Physical Basis LD1 | Natural Gas | IEPA | |
| XNT | | Cheyenne Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XNS | | Cheyenne Physical Fixed Price Spot | Natural Gas | IEPA | |
| XNV | | Cheyenne Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XNU | | Cheyenne Physical Gas Daily Spot | Natural Gas | IEPA | |
| XNW | | Cheyenne Physical Inside FERC | Natural Gas | IEPA | |
| XNQ | | Consumers Physical Basis LD1 | Natural Gas | IEPA | |
| XNM | | Consumers Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XNL | | Consumers Physical Fixed Price Spot | Natural Gas | IEPA | |
| XNO | | Consumers Physical Gas Daily Monthly | Natural Gas | IEPA | |
| XNN | | Consumers Physical Gas Daily Spot | Natural Gas | IEPA | |
| XNP | | Consumers Physical Inside FERC | Natural Gas | IEPA | |
| YD9 | | Cove Point Physical Basis LD1 | Natural Gas | IEPA | |
| YD7 | | Cove Point Physical Fixed Price Daily | Natural Gas | IEPA | |
| YD8 | | Cove Point Physical Fixed Price Monthly | Natural Gas | IEPA | |
| YD6 | | Cove Point Physical Gas Daily Monthly | Natural Gas | IEPA | |
| YD5 | | Cove Point Physical Gas Daily Spot | Natural Gas | IEPA | |
| XX3 | | Eastern Gas-North Physical Basis LD1 | Natural Gas | IEPA | |
| XBI | | Eastern Gas-North Physical Fixed Price Monthly | Natural Gas | IEPA | |
| XAX | | Eastern Gas-North Physical Fixed Price Spot | Natural Gas | IEPA | |