| 2024 | The George H and Elta Spencer | 990PF | President | 1 | $1,800 | $0 | View return |
| 2024 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2023 | The George H and Elta Spencer | 990PF | President | 1 | $1,800 | $0 | View return |
| 2023 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2023 | Ground Water Protection | 990 | Director | - | $0 | $0 | View return |
| 2023 | Ground Water Research & Education | 990 | Board Presid | - | $0 | $0 | View return |
| 2023 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2022 | The George H and Elta Spencer | 990PF | President | 1 | $1,500 | $0 | View return |
| 2022 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2022 | Ground Water Research & Education | 990 | Board Presid | 1 | $0 | $0 | View return |
| 2022 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2021 | The George H and Elta Spencer | 990PF | President | 1 | $1,500 | $0 | View return |
| 2021 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2021 | Ground Water Protection | 990 | Ex-Officio | 1 | $0 | $0 | View return |
| 2021 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2021 | Ground Water Research & Education | 990 | President | 1 | $0 | $0 | View return |
| 2020 | The George H and Elta Spencer | 990PF | President | 1 | $1,500 | $0 | View return |
| 2020 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2020 | Ground Water Protection | 990 | Ex-Officio | 1 | $0 | $0 | View return |
| 2020 | Ground Water Research & Education | 990 | President | 1 | $0 | $0 | View return |
| 2020 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2019 | The George H and Elta Spencer | 990PF | Secretary | 1 | $1,500 | $0 | View return |
| 2019 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2019 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2018 | The George H and Elta Spencer | 990PF | Secretary | 1 | $1,500 | $0 | View return |
| 2018 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2018 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2017 | The George H and Elta Spencer | 990PF | Secretary | 1 | $1,500 | $0 | View return |
| 2017 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2017 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2016 | The George H and Elta Spencer | 990PF | Secretary | 1 | $1,500 | $0 | View return |
| 2016 | Ground Water Research & Education | 990 | President | 2 | $0 | $0 | View return |
| 2016 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2016 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2016 | Ground Water Protection | 990 | Ex-Officio | 1 | $0 | $0 | View return |
| 2015 | The George H and Elta Spencer | 990PF | Secretary | 1 | $1,500 | $0 | View return |
| 2015 | Cheyenne County Hospital | 990 | Member | 4 | $0 | $0 | View return |
| 2015 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2014 | The George H and Elta Spencer | 990PF | Secretary | 5 | $1,200 | $0 | View return |
| 2014 | Cheyenne County Hospital | 990 | Member | 1 | $0 | $0 | View return |
| 2014 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2013 | The George H and Elta Spencer | 990PF | Secretary | 5 | $1,200 | $0 | View return |
| 2013 | Cheyenne County Hospital | 990 | Member | 1 | $0 | $0 | View return |
| 2013 | Cheyenne County Hospital & Health Center | 990 | Member | 1 | $0 | $0 | View return |
| 2012 | The George H and Elta Spencer | 990PF | Secretary | 5 | $1,000 | $0 | View return |
| 2011 | The George H and Elta Spencer | 990PF | Secretary | 5 | $1,200 | $0 | View return |
| 2010 | The George H and Elta Spencer | 990PF | Secretary | 5 | $1,200 | $0 | View return |