| 2025 | Yolo Transportation Mgmt Assoc | 990EZ | Treasurer | 0 | $0 | - | View return |
| 2024 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | The Niskanen Center Inc. | 990 | Director | 3 | $0 | $0 | View return |
| 2024 | Taxpayers for Common Sense | 990 | Director | 0.5 | $0 | $0 | View return |
| 2024 | Niskanen Center for Public Policy Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2023 | Niskanen Center for Public Policy Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2023 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Taxpayers for Common Sense | 990 | Director | 0.5 | $0 | $0 | View return |
| 2023 | The Niskanen Center Inc. | 990 | Director | 3 | $0 | $0 | View return |
| 2022 | Taxpayers for Common Sense | 990 | Director | 0.5 | $0 | $0 | View return |
| 2022 | Niskanen Center for Public Policy Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2022 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | The Niskanen Center Inc. | 990 | Director | 3 | $0 | $0 | View return |
| 2022 | Center for National Independence in Politics | 990 | Board Member | 2 | $0 | $0 | View return |
| 2021 | Citizens Climate Education Corp | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Taxpayers for Common Sense | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Niskanen Center for Public Policy Inc | 990 | Treasurer | - | $0 | $0 | View return |
| 2021 | Niskanen Center for Public Policy Inc | 990 | Treasurer | - | $0 | $0 | View return |
| 2020 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Citizens Climate Education Corp | 990 | Board Member | 2 | $0 | $0 | View return |
| 2020 | The Niskanen Center Inc. | 990 | Director | 2.5 | $0 | $0 | View return |
| 2020 | Taxpayers for Common Sense | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Climate Xchange Education and Research Inc. | 990 | Board Member | 2 | $0 | $0 | View return |
| 2020 | Climate Xchange Education and Research Inc. | 990 | Board Member | 2 | $0 | $0 | View return |
| 2019 | The Niskanen Center Inc. | 990 | Director | 2.5 | $0 | $0 | View return |
| 2019 | Citizens Climate Education Corp | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2019 | Taxpayers for Common Sense | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Climate Xchange Education and Research Inc. | 990 | Board Member | 2 | $0 | $0 | View return |
| 2019 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Climate Xchange Education and Research Inc. | 990 | Board Member | 2 | $0 | $0 | View return |
| 2018 | The Niskanen Center Inc. | 990 | Director | 2.5 | $0 | $0 | View return |
| 2018 | Taxpayers for Common Sense | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Citizens Climate Education Corp | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Herb Research Foundation | 990EZ | Director | 0 | $0 | $0 | View return |
| 2017 | Herb Research Foundation | 990EZ | Director | 0 | $0 | $0 | View return |
| 2017 | Citizens for Responsibility and Ethics in Washington DC Inc | 990 | Director (From 4/2017) | 1 | $0 | $0 | View return |
| 2017 | Citizens Climate Education Corp | 990 | Boardmember | 1 | $0 | $0 | View return |
| 2016 | Citizens Climate Education Corp | 990 | Boardmember | 1 | $0 | $0 | View return |
| 2016 | Herb Research Foundation | 990EZ | Director | 0 | $0 | - | View return |
| 2015 | Herb Research Foundation | 990EZ | Director | 0 | $0 | - | View return |
| 2014 | Herb Research Foundation | 990EZ | Director | 0 | $0 | - | View return |
| 2013 | Environmental and Energy Study Institute | 990 | Director | 0.5 | $0 | $0 | View return |
| 2013 | Herb Research Foundation | 990EZ | Director | 0 | $0 | - | View return |