| 2024 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2023 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2022 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2022 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2021 | Brenton Arboretum Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2021 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2020 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2020 | Brenton Arboretum Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2019 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2019 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2018 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | East End Seaport Museum and Marine | 990 | Director | - | $0 | $0 | View return |
| 2017 | Gospel Lakes Ministries Inc | 990 | Chairman | 3 | $0 | $0 | View return |
| 2017 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | East End Seaport Museum and Marine | 990 | Director | 5 | $0 | $0 | View return |
| 2016 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Gospel Lakes Ministries Inc | 990 | Vice Chairman | 3 | $0 | $0 | View return |
| 2015 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Gospel Lakes Ministries Inc | 990 | Vice Chairman | 3 | $0 | $0 | View return |
| 2015 | East End Seaport Museum and Marine | 990 | Director | 10 | $0 | $0 | View return |
| 2014 | Gospel Lakes Ministries Inc | 990 | Vice Chairman | 3 | $0 | $0 | View return |
| 2014 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | East End Seaport Museum and Marine | 990 | Director | 10 | $0 | $0 | View return |
| 2014 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Gospel Lakes Ministries Inc | 990 | Vice Chairman | 3 | $0 | $0 | View return |
| 2013 | Iowa Natural Heritage Foundation | 990 | Director | 1 | $0 | $0 | View return |