| 2024 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2023 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2023 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2022 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2022 | Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2021 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2021 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2021 | Gilder Lehrman Institute of American History | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2020 | Gilder Lehrman Institute of American History | 990 | Co-Chair | 1 | $0 | $0 | View return |
| 2020 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2019 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2019 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2019 | Gilder Lehrman Institute of American History | 990 | Co-Chair & Executive V.P. | 1 | $0 | $0 | View return |
| 2018 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2018 | Gilder Lehrman Institute of American History | 990 | Co-Chair & Executive V.P. | 1 | $0 | $0 | View return |
| 2018 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2017 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2017 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2017 | The New York Historical Society | 990 | Trustee (Ended 5/15/18) | 1 | $0 | $0 | View return |
| 2017 | Gilder Lehrman Institute of American History | 990 | Co-Chair & Executive V.P. | 1 | $0 | $0 | View return |
| 2016 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2016 | The New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2016 | Gilder Lehrman Institute of American History | 990 | Co-Chair & Executive V.P. | 1 | $0 | $0 | View return |
| 2015 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2015 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2015 | Gilder Lehrman Institute of American History | 990 | Co-Chair & Executive V.P. | 1 | $0 | $0 | View return |
| 2015 | The New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Lincoln Institute | 990PF | Chairman Of Board | 1 | $0 | $0 | View return |
| 2014 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2014 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2014 | Gilder Lehrman Institute of American History | 990 | Executive Vice President | 1 | $0 | $0 | View return |
| 2014 | The New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | The Lincoln Institute | 990PF | Chairman Of Board | 1 | $0 | $0 | View return |
| 2013 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2013 | Gilder Lehrman Institute of American History | 990 | Executive Vice President | 1 | $0 | $0 | View return |
| 2013 | The New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2012 | The Lincoln Institute | 990PF | Chairman Of Board | 1 | $0 | $0 | View return |
| 2012 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2012 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2011 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |
| 2011 | The Lincoln Institute | 990PF | Chairman Of Board | 1 | $0 | $0 | View return |
| 2011 | The Lehrman Institute | 990PF | Chairman | 1 | $0 | $0 | View return |
| 2010 | Johnson-Stillman Family Foundation Tr | 990PF | Trustee | 0.5 | $0 | - | View return |