| 2024 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2023 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2023 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2022 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2022 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2022 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2021 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2021 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2021 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2020 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2020 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2020 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2019 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2019 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2019 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2018 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2018 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2018 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2018 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2017 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2017 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2017 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2016 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2016 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2016 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2015 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2015 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2015 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2014 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2014 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |
| 2014 | Hansjorg Wyss Institute for Biologically Inspired Engineering at Harvard Univ Inc | 990 | Director | 0.5 | $0 | $0 | View return |
| 2014 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Conservation Lands Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2013 | Center for American Progress | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | The Wilderness Society | 990 | At-Large | 2 | $0 | $0 | View return |