| 2025 | Water for Life Institute | 990EZ | President | 5 | $0 | $0 | View return |
| 2025 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2025 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2025 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2024 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2024 | Water for Life Institute | 990EZ | Chairperson | 5 | $0 | $0 | View return |
| 2024 | Amador County Arts Council | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2023 | Water for Life Institute | 990EZ | Chairperson | 1 | $0 | $0 | View return |
| 2023 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2023 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2022 | Water for Life Institute | 990EZ | Chairperson | 1 | $0 | $0 | View return |
| 2022 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2022 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2021 | Water for Life Institute | 990 | Chairperson Of Board Of Trust | 0 | $0 | $0 | View return |
| 2021 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2020 | Montgomery County Farm Bureau | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2020 | Doddridge Chapel Cemetery Association Ltd. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2020 | Water for Life Institute | 990 | Chairperson Of Board Of Trust | 0 | $0 | $0 | View return |
| 2019 | Water for Life Institute | 990EZ | Chairman | 0 | $0 | $0 | View return |
| 2019 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2018 | Water for Life Institute | 990EZ | President | 0 | $0 | $0 | View return |
| 2018 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2017 | Water for Life Institute | 990EZ | Member | 1 | $0 | $0 | View return |
| 2017 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2016 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2016 | Water for Life Institute | 990EZ | Member | 1 | $0 | $0 | View return |
| 2015 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2015 | Water for Life Institute | 990EZ | Member | 1 | $0 | $0 | View return |
| 2014 | Hospice of Southwest Ohio Foundation | 990EZ | President | 1 | $0 | - | View return |
| 2014 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2013 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2013 | Hospice of Southwest Ohio Foundation | 990EZ | President | 1 | $0 | - | View return |
| 2012 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0.25 | $0 | $0 | View return |
| 2011 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2010 | Gary and Denise Gardner Family Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |