| 2024 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2024 | Omohundro Institute of Early American History and Culture | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | The New York Public Library Astor Lenox and Tilden Foundations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | Massachusetts Historical Society | 990 | Trustee | 3 | $0 | $0 | View return |
| 2024 | Organization of American Historians | 990 | President Elect (Exp. April 2025), President (Beg. April 2025) | 5 | $0 | $0 | View return |
| 2023 | Thomas Jefferson Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2023 | Organization of American Historians | 990 | Vice President (Exp. April 2024), President Elect (Beg. April 2024) | 5 | $0 | $0 | View return |
| 2023 | Omohundro Institute of Early American History and Culture | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | The New York Public Library Astor Lenox and Tilden Foundations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Thomas Jefferson Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Omohundro Institute of Early American History and Culture | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | The New York Public Library Astor Lenox and Tilden Foundations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2021 | Thomas Jefferson Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | National Humanities Center | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2021 | The New York Public Library Astor Lenox and Tilden Foundations | 990 | Trustee (Start 9/21) | 1 | $0 | $0 | View return |
| 2021 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2021 | Omohundro Institute of Early American History and Culture | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Society for Historians of the Early American Republic -Shear- Inc | 990 | President | 5 | $0 | $0 | View return |
| 2020 | National Humanities Center | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2020 | Thomas Jefferson Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2019 | National Humanities Center | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2019 | Massachusetts Historical Society | 990 | Trustee | 3 | $0 | $0 | View return |
| 2019 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Ames Foundation | 990PF | President | 1 | $0 | - | View return |
| 2018 | National Humanities Center | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2018 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2017 | Colonial Williamsburg Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2017 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2017 | The Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2016 | Pen American Center Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Colonial Williamsburg Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Trustees of Dartmouth College | 990 | Trustee | 3 | $0 | $0 | View return |
| 2016 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2015 | Pen American Center Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | The National Book Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2015 | Trustees of Dartmouth College | 990 | Trustee | 3 | $0 | $0 | View return |
| 2014 | Pen American Center Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |
| 2014 | The National Book Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Trustees of Dartmouth College | 990 | Trustee | 3 | $0 | $0 | View return |
| 2013 | Trustees of Dartmouth College | 990 | Trustee | 3 | $0 | $0 | View return |
| 2013 | The Authors Guild Inc | 990 | Council | 2 | $0 | $0 | View return |