| 2024 | Carbon Free California | 990EZ | CEO | 1 | $0 | $0 | View return |
| 2024 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2024 | National Technology Security Coalition Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2024 | The Breakthrough Institute | 990 | Board Member | 1 | $0 | $0 | View return |
| 2024 | Computer History Museum | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | National Technology Security Coalition Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Carbon Free California | 990EZ | CEO | 1 | $0 | $0 | View return |
| 2023 | The Breakthrough Institute | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Terrapraxis Inc. | 990 | Director | 4 | $0 | $0 | View return |
| 2023 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2023 | Computer History Museum | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Carnegie Institution of Washington | 990 | Trustee | 4 | $0 | $0 | View return |
| 2023 | The University of Texas Texas a M Investment Management Company | 990 | Director/Vice Chairman | 1 | $0 | $0 | View return |
| 2022 | Nuclear Innovation Alliance | 990 | Director | 0.25 | $0 | $0 | View return |
| 2022 | National Technology Security Coalition Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | Terrapraxis Inc. | 990 | Director | 4 | $0 | $0 | View return |
| 2022 | The Breakthrough Institute | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Carbon Free California | 990 | CEO | 1 | $0 | $0 | View return |
| 2022 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2022 | Computer History Museum | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Carnegie Institution of Washington | 990 | Trustee | 2 | $0 | $0 | View return |
| 2021 | The Breakthrough Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | National Technology Security Coalition Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2021 | Nuclear Innovation Alliance | 990 | Director | 0.25 | $0 | $0 | View return |
| 2021 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2021 | National Association of Corporate Directors Northern California Chapter | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Nuclear Innovation Alliance | 990 | Director | 0.25 | $0 | $0 | View return |
| 2021 | Computer History Museum | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Carnegie Institution of Washington | 990 | Trustee | 2 | $0 | $0 | View return |
| 2020 | National Association of Corporate Directors Northern California Chapter | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2020 | Nuclear Innovation Alliance | 990 | Director | 0.25 | $0 | $0 | View return |
| 2020 | The Breakthrough Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | National Technology Security Coalition Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | Computer History Museum | 990 | Board Member (As Of 10/20) | 1 | $0 | $0 | View return |
| 2020 | Carnegie Institution of Washington | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | National Association of Corporate Directors Northern California Chapter | 990 | Director | 2 | $0 | $0 | View return |
| 2019 | Nuclear Innovation Alliance | 990 | Director | 0.25 | $0 | $0 | View return |
| 2019 | The Breakthrough Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Nuclear Threat Initiative Inc. | 990 | Member Of The Board Of Directors | 4 | $0 | $0 | View return |
| 2019 | Carnegie Institution of Washington | 990 | Trustee | 2 | $0 | $0 | View return |
| 2018 | World Affairs Council of Northern California | 990 | Trustee (Through 05/18) | 1 | $0 | $0 | View return |
| 2018 | National Association of Corporate Directors Northern California Chapter | 990 | Director | 2 | $0 | $0 | View return |
| 2018 | The Breakthrough Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Carnegie Institution of Washington | 990 | Trustee | 2 | $0 | $0 | View return |
| 2017 | World Affairs Council of Northern California | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Breakthrough Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | World Affairs Council of Northern California | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | World Affairs Council of Northern California | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | World Affairs Council of Northern California | 990 | Trustee | 0 | $0 | $0 | View return |
| 2015 | Theatreworks Silicon Valley | 990 | Board Member | 2 | $0 | $0 | View return |
| 2013 | Heat and Frost Insulators and Asbestos | 990 | Union Trustee | 1 | $0 | $0 | View return |
| 2013 | Theatreworks Silicon Valley | 990 | Board Member | 2 | $0 | $0 | View return |