| 2024 | Aigyptos Institute | 990EZ | Treasurer | 1 | $0 | $0 | View return |
| 2024 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2023 | Big O Trail Riders Corporation | 990EZ | President | 10 | $0 | - | View return |
| 2023 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Greater Lovell Land Trust Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2022 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Greater Lovell Land Trust Inc. | 990 | Director | 0.5 | $0 | $0 | View return |
| 2022 | Big O Trail Riders Corporation | 990EZ | President | 10 | $0 | - | View return |
| 2022 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2021 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $105,115 | $0 | View return |
| 2021 | Greater Lovell Land Trust Inc. | 990 | Director | 0.7 | $0 | $0 | View return |
| 2021 | Big O Trail Riders Corporation | 990EZ | President | 10 | $0 | - | View return |
| 2021 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2020 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $101,881 | $0 | View return |
| 2020 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Reamstown Fire Company | 990 | Treasurer | 10 | $0 | $0 | View return |
| 2020 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2019 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $101,430 | $0 | View return |
| 2019 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Reamstown Fire Company | 990 | Treasurer | 10 | $0 | $0 | View return |
| 2019 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | The Clay Mathematics Institute Inc | 990PF | Treasurer/Director | 5 | $0 | $0 | View return |
| 2018 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $99,300 | $0 | View return |
| 2018 | Reamstown Fire Company | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2018 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2017 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $102,133 | $0 | View return |
| 2017 | Reamstown Fire Company | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2017 | Clay Fellowships Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2017 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2016 | Door County Land Trust Inc. | 990 | Executive Director | 40 | $19,883 | $0 | View return |
| 2016 | Reamstown Fire Company | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2016 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2015 | Reamstown Fire Company | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2015 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2014 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2013 | Reamstown Fire Company | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2013 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2013 | Front Range Health Partners LLC | 990 | Chief Executive Officer | 1 | - | - | View return |
| 2012 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2011 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2010 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |
| 2009 | The Clay Mathematics Institute Inc | 990PF | Director | 5 | $0 | $0 | View return |