| 2023 | California Institute of Technology | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | California Institute of Technology | 990 | Trustee | 2 | $0 | $0 | View return |
| 2019 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | MID Atlantic Business Finance Company | 990 | President | 40 | $56,635 | $0 | View return |
| 2017 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | MID Atlantic Business Finance Company | 990 | President | 40 | $92,000 | $0 | View return |
| 2016 | Western Maryland Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Lower Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | MID Atlantic Business Finance Company | 990 | President | 40 | $90,000 | $0 | View return |
| 2015 | O S Johnson School of Technology | 990 | Board Member | 0.3 | $0 | $0 | View return |
| 2015 | Western Maryland Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Lower Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | MID Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Corporation of the Fine Arts Museums | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Western Maryland Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | O S Johnson School of Technology | 990 | Board Member | 0.3 | $0 | $0 | View return |
| 2014 | MID Atlantic Business Finance Company | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Lower Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | MID Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | California Institute of Technology | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | O S Johnson School of Technology | 990 | Board Member | 0.3 | $0 | $0 | View return |
| 2013 | MID Shore Rural Lending Corporation | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | California Institute of Technology | 990 | Trustee | 1 | - | - | View return |