| Bentley, Tracee M | American Petroleum Institute | Monitoring | 2018-2019 |
| Bentley, Tracee M | American Petroleum Institute | Amending | 2018-2019 |
| Capitol Focus, LLC | American Petroleum Institute | Opposing | 2018-2019 |
| Capitol Focus, LLC | American Petroleum Institute | Monitoring | 2018-2019 |
| HB Strategies | American Petroleum Institute | Monitoring | 2018-2019 |
| J. Andrew Green & Assoc., Inc. | Animas La Plata Operation Maintenance & Replacement Association | Monitoring | 2018-2019 |
| Treese, Chris | COLO RIVER WATER CONSERVATION DIST | Supporting | 2018-2019 |
| Colorado Legislative Strategies | COLORADO OIL & GAS ASSOCIATION | Supporting | 2018-2019 |
| Deborah A. Wagner, LLC | City of Trinidad | Monitoring | 2018-2019 |
| Votoupal Government Affairs LLC | Colorado River Water Conservation District | Supporting | 2018-2019 |
| Belgard, Katie A | Conservation Colorado | Supporting | 2018-2019 |
| Siegel Long Public Affairs, LLC | Conservation Colorado | Supporting | 2018-2019 |
| Siegel Public Affairs, LLC | Conservation Colorado | Supporting | 2018-2019 |
| PIPER, CHRISTOPHER N | DENVER WATER | Monitoring | 2018-2019 |
| Stauffer, Heather LaVon | Denver Water | Monitoring | 2018-2019 |
| Colorado Legislative Strategies | PDC Energy | Supporting | 2018-2019 |
| G BERRY CORP | PEABODY | Monitoring | 2018-2019 |
| G Berry Corp | Peabody Energy | Monitoring | 2018-2019 |
| Kessler, Zane | The Colorado River Water Conservation District | Supporting | 2018-2019 |
| J. Andrew Green & Assoc., Inc. | The Water Rights Association of the South Platte | Monitoring | 2018-2019 |
| J. Andrew Green & Assoc., Inc. | Widefield Water and Sanitation District | Monitoring | 2018-2019 |