| 2024 | Corner House Housing Development Fund Corporation | 990 | Vice President | 0.25 | $0 | $0 | View return |
| 2024 | Stanley M Isaacs Neighborhood Center Inc. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2023 | Natural Areas Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Peconic Land Trust Incorporated | 990 | Co-Chair | 2 | $0 | $0 | View return |
| 2023 | Capitol Hall Preservation Housing Development Fund Corporation | 990 | Vice President | 0 | $0 | $0 | View return |
| 2023 | Stanley M Isaacs Neighborhood Center Inc. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2023 | Corner House Housing Development Fund Corporation | 990 | Vice President | 0.25 | $0 | $0 | View return |
| 2023 | Goddard Riverside Community Center | 990 | Chairman | 3 | $0 | $0 | View return |
| 2022 | Peconic Land Trust Incorporated | 990 | Co-Chair | 2 | $0 | $0 | View return |
| 2022 | Natural Areas Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Capitol Hall Preservation Housing Development Fund Corporation | 990 | Vice President | 0 | $0 | $0 | View return |
| 2022 | Stanley M Isaacs Neighborhood Center Inc. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2022 | Capitol Hall Preservation Housing Development Fund Corporation | 990 | Vice President | 0 | $0 | $0 | View return |
| 2022 | Goddard Riverside Community Center | 990 | Secretary | 1 | $0 | $0 | View return |
| 2021 | Natural Areas Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Our Energy Policy Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2021 | Peconic Land Trust Incorporated | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2021 | Stanley M Isaacs Neighborhood Center Inc. | 990 | Secretary | 0.5 | $0 | $0 | View return |
| 2021 | Goddard Riverside Community Center | 990 | Secretary | 1 | $0 | $0 | View return |
| 2020 | Peconic Land Trust Incorporated | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2020 | Natural Areas Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Goddard Riverside Community Center | 990 | Member | 1 | $0 | $0 | View return |
| 2019 | Natural Areas Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Peconic Land Trust Incorporated | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2019 | Goddard Riverside Community Center | 990 | Member | 1 | $0 | $0 | View return |
| 2018 | New York League of Conservation Voters Inc | 990 | President (Through 09/18) | 20.4 | $168,263 | $0 | View return |
| 2018 | New York League of Conservation Voters Education Fund Inc. | 990 | President (Through 09/18) | 19.2 | $0 | $168,263 | View return |
| 2018 | Peconic Land Trust Incorporated | 990 | Board Member | 2 | $0 | $0 | View return |
| 2018 | Goddard Riverside Community Center | 990 | Member | 1 | $0 | $0 | View return |
| 2017 | New York League of Conservation Voters Inc | 990 | President | 21 | $197,562 | $0 | View return |
| 2017 | New York League of Conservation Voters Education Fund Inc. | 990 | President | 19 | $0 | $197,562 | View return |
| 2016 | New York League of Conservation Voters Inc | 990 | President | 21 | $197,602 | $0 | View return |
| 2016 | New York League of Conservation Voters Education Fund Inc. | 990 | President | 19 | $0 | $197,602 | View return |
| 2016 | Friends of the High School for Environmental Studies Inc | 990EZ | Director | 0.2 | $0 | $0 | View return |
| 2015 | New York League of Conservation Voters Inc | 990 | President | 18 | $197,577 | $0 | View return |
| 2015 | New York League of Conservation Voters Education Fund Inc. | 990 | President | 17 | $0 | $197,577 | View return |
| 2015 | Friends of the High School for Environmental Studies Inc | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2014 | New York League of Conservation Voters Education Fund Inc. | 990 | President | 19 | $83,429 | $90,381 | View return |
| 2014 | New York League of Conservation Voters Inc | 990 | President | 20 | $81,691 | $92,119 | View return |
| 2014 | Friends of the High School for Environmental Studies Inc | 990EZ | Director | 0.25 | $0 | $0 | View return |
| 2013 | New York League of Conservation Voters Inc | 990 | President | 20 | $78,848 | $75,755 | View return |
| 2013 | New York League of Conservation Voters Education Fund Inc. | 990 | President | 19 | $74,209 | $80,394 | View return |
| 2013 | Friends of the High School for Environmental Studies Inc | 990EZ | Director | 0.25 | $0 | $0 | View return |