| 2023 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2023 | Safe Harbor Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Bellefonte Art Museum for Centre County | 990 | President | 15 | $0 | $0 | View return |
| 2023 | 4-H Camp Clifton | 990 | Clark Co 4-H Extension | 1 | $0 | $0 | View return |
| 2022 | Safe Harbor Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2022 | Bellefonte Art Museum for Centre County | 990 | President | 30 | $0 | $0 | View return |
| 2022 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2022 | 4-H Camp Clifton | 990 | Clark Co 4-H Extension | 1 | $0 | $0 | View return |
| 2021 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2021 | Safe Harbor Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2021 | Bellefonte Art Museum for Centre County | 990 | President | 30 | $0 | $0 | View return |
| 2020 | Bellefonte Art Museum for Centre County | 990 | President | 30 | $0 | $0 | View return |
| 2020 | Carnegie Endowment for International Peace | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2019 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2019 | Bellefonte Art Museum for Centre County | 990 | President | 30 | $0 | $0 | View return |
| 2019 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2018 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2018 | Bellefonte Art Museum for Centre County | 990 | President | 30 | $0 | $0 | View return |
| 2018 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2017 | Mary Mae Foundation | 990PF | President & CFO | 2 | $0 | $0 | View return |
| 2017 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2017 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2017 | Bellefonte Art Museum for Centre County | 990EZ | President | 30 | $0 | - | View return |
| 2016 | Bellefonte Art Museum for Centre County | 990EZ | President | 30 | $0 | - | View return |
| 2016 | Mary Mae Foundation | 990PF | President & CFO | 2 | $0 | $0 | View return |
| 2016 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2016 | Carnegie Endowment for International Peace | 990 | Trustee | 2.5 | $0 | $0 | View return |
| 2015 | Bellefonte Art Museum for Centre County | 990EZ | President | 30 | $0 | $0 | View return |
| 2015 | Energy Free Home Foundation | 990PF | Director | 0 | $0 | $0 | View return |
| 2015 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2015 | Tanzania Education Fund Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2015 | Mary Mae Foundation | 990PF | President & CFO | 2 | $0 | $0 | View return |
| 2015 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2014 | Tanzania Education Fund Inc | 990EZ | Board Member | 1 | $0 | - | View return |
| 2014 | Energy Free Home Foundation | 990PF | Director | 0 | $0 | $0 | View return |
| 2014 | Bellefonte Art Museum for Centre County | 990EZ | President | 30 | $0 | $0 | View return |
| 2014 | Mary Mae Foundation | 990PF | President & CFO | 2 | $0 | $0 | View return |
| 2014 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2014 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2013 | Carnegie Endowment for International Peace | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2013 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2012 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2012 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2011 | The William & Flora Hewlett Foundation | 990PF | Director | 2 | $0 | $0 | View return |