| Siegel Long Public Affairs, LLC | 350 Colorado | Opposing | 2021-2022 |
| Siegel Public Affairs, LLC | 350 Colorado | Opposing | 2021-2022 |
| Siegel Long Public Affairs, LLC | AMERICA VOTES | Opposing | 2021-2022 |
| Siegel Public Affairs, LLC | America Votes | Opposing | 2021-2022 |
| American Property Casualty Insurance Association | American Property Casualty Insurance Association | Opposing | 2021-2022 |
| Fulcrum Solutions, LLC | American Property Casualty Insurance Association | Opposing | 2021-2022 |
| Markuson, Chris | BlueGreen Alliance | Opposing | 2021-2022 |
| Copeland, Cindy | Boulder County | Opposing | 2021-2022 |
| OnTheBallot Consulting | Colorado Alliance of Mineral and Royalty Owners | Supporting | 2021-2022 |
| Colorado Common Cause | Colorado Common Cause | Monitoring | 2021-2022 |
| Political Advocacy, Inc | Colorado Communities for Climate Action | Opposing | 2021-2022 |
| Adam, Fox Bennett | Colorado Consumer Health Initiative | Opposing | 2021-2022 |
| Cruz, Isabel Ariel | Colorado Consumer Health Initiative | Opposing | 2021-2022 |
| Stonner, Hope Alina | Colorado Consumer Health Initiative | Opposing | 2021-2022 |
| Angie Binder | Colorado Petroleum Association | Monitoring | 2021-2022 |
| Siegel Long Public Affairs, LLC | Conservation Colorado | Opposing | 2021-2022 |
| Siegel Public Affairs, LLC | Conservation Colorado | Opposing | 2021-2022 |
| Weist Capitol Group, Inc. | Energy Outreach Colorado | Opposing | 2021-2022 |
| Kuhns, Suzann Ellen | International Brotherhood of Electrical Workers local union 111 | Monitoring | 2021-2022 |
| OnTheBallot Consulting | Interwest Energy Alliance | Opposing | 2021-2022 |
| Gilchrist, Sam | Natural Resources Defense Council | Opposing | 2021-2022 |
| Miller, Alana | Natural Resources Defense Council | Opposing | 2021-2022 |
| Skewes Government Affairs, LLC | State Farm Insurance Companies | Monitoring | 2021-2022 |
| Gelay, Jessica | Western Resource Advocates | Opposing | 2021-2022 |