| 2025 | Society for Claustrum Research Inc. | 990EZ | President | 2 | $0 | $0 | View return |
| 2025 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 0.25 | $0 | $0 | View return |
| 2024 | Society for Claustrum Research Inc. | 990EZ | President | 2 | $0 | $0 | View return |
| 2024 | Blue Mountain Conservation Association | 990EZ | Member | 1 | $0 | - | View return |
| 2024 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 0.25 | $0 | $0 | View return |
| 2024 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2024 | Common Ground on the Hill Ltd. | 990 | Member | 2 | $0 | $0 | View return |
| 2023 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2023 | Society for Claustrum Research Inc. | 990EZ | President | 2 | $0 | $0 | View return |
| 2023 | Blue Mountain Conservation Association | 990EZ | Member | 1 | $0 | - | View return |
| 2023 | Common Ground on the Hill Ltd. | 990 | Member | 2 | $0 | $0 | View return |
| 2022 | Civitas Ensemble | 990EZ | Director | 1 | $0 | $0 | View return |
| 2022 | Society for Claustrum Research Inc. | 990EZ | President | 2 | $0 | $0 | View return |
| 2022 | Blue Mountain Conservation Association | 990EZ | Member | 1 | $0 | - | View return |
| 2021 | Society for Claustrum Research Inc. | 990EZ | President | 2 | $0 | $0 | View return |
| 2021 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2021 | The Butterfly Foundation | 990 | Board Member | 2 | $0 | $0 | View return |
| 2020 | Buckskin Council Boy Scouts of America | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2019 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2019 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2019 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2018 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2018 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2018 | Animal Lifeline of Iowa Inc. | 990 | Vice President | 5 | $0 | $0 | View return |
| 2018 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2017 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2017 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |
| 2017 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2017 | Buckskin Council Boy Scouts of America Inc | 990 | Vice President Of District | 2 | $0 | $0 | View return |
| 2017 | Animal Lifeline of Iowa Inc. | 990 | Vice President | 5 | $0 | $0 | View return |
| 2016 | Buckskin Council Boy Scouts of America | 990 | Vice President Of District Operations | 2 | $0 | $0 | View return |
| 2016 | Buckskin Council Boy Scouts of America Inc | 990 | Vice President Of District Operations | 2 | $0 | $0 | View return |
| 2016 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |
| 2016 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2015 | Buckskin Council Boy Scouts of America Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | Buckskin Council Boy Scouts of America | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |
| 2015 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2014 | Civitas Ensemble | 990EZ | Director | 1 | $0 | - | View return |
| 2014 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |
| 2013 | Civitas Ensemble | 990 | Board Member | 1 | $0 | $0 | View return |
| 2012 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2012 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2011 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |
| 2010 | The John & Elizabeth Van Horn Family Foundation | 990PF | Trustee | 1 | $0 | - | View return |