| 2024 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2024 | Rethink Coalition Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2024 | March on Washington Film Festival | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | March on Washington Film Festival | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2023 | March on Washington Film Festival | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Historic Landmarks Foundation of Indiana Inc. | 990 | Director | 0.3 | $0 | $0 | View return |
| 2023 | National Archives Foundation | 990 | Distinguished Historian | 1.5 | $0 | $0 | View return |
| 2022 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2022 | March on Washington Film Festival | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | National Archives Foundation | 990 | Distinguished Historian | 1.5 | $0 | $0 | View return |
| 2021 | March on Washington Film Festival | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2021 | Historic Landmarks Foundation of Indiana Inc. | 990 | Director | 0.25 | $0 | $0 | View return |
| 2021 | National Archives Foundation | 990 | Distinguished Historian | 1.5 | $0 | $0 | View return |
| 2020 | March on Washington Film Festival | 990 | Director | 5 | $0 | $0 | View return |
| 2020 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2020 | National Archives Foundation | 990 | Dist. Historian & Immed. Past Pres. | 1.5 | $0 | $0 | View return |
| 2020 | The Trustees of Columbia University in the City of New York | 990 | Trustee (Through 3/6/21) | 4 | $0 | $0 | View return |
| 2019 | March on Washington Film Festival | 990 | Director | 5 | $0 | $0 | View return |
| 2019 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2019 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2019 | National Archives Foundation | 990 | Board Member | 1.5 | $0 | $0 | View return |
| 2018 | March on Washington Film Festival | 990 | Director | 5 | $0 | $0 | View return |
| 2018 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2018 | National Archives Foundation | 990 | Board Member | 1.5 | $0 | $0 | View return |
| 2018 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2017 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2017 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2016 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2016 | March on Washington Film Festival | 990 | Director | 5 | $0 | $0 | View return |
| 2016 | National Archives Foundation | 990 | Chair & President | 5 | $0 | $0 | View return |
| 2016 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2015 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2015 | National Archives Foundation | 990 | Chair & President | 5 | $0 | $0 | View return |
| 2015 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2014 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2014 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 4 | $0 | $0 | View return |
| 2013 | Woodlawn Conservancy Inc. | 990 | Director | 1.3 | $0 | $0 | View return |
| 2013 | The Trustees of Columbia University in the City of New York | 990 | Trustee | 3 | $0 | $0 | View return |