| 2025 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2024 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2024 | The Garden Conservancy Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2024 | The Preservation Society of Charleston Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2024 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2023 | Chicago Horticultural Society | 990 | Board Member | 2 | $0 | $0 | View return |
| 2023 | The Garden Conservancy Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2023 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2023 | The Preservation Society of Charleston Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2022 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2022 | Chicago Horticultural Society | 990 | Board Member | 2 | $0 | $0 | View return |
| 2022 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | The Garden Conservancy Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2021 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2021 | Chicago Horticultural Society | 990 | Board Member | 2 | $0 | $0 | View return |
| 2021 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2021 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2020 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2020 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2019 | Drayton Hall Preservation Trust | 990 | Trustee | 2 | $0 | $0 | View return |
| 2019 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2019 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2018 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2018 | Drayton Hall Preservation Trust | 990 | Trustee | 3 | $0 | $0 | View return |
| 2018 | The Garden Conservancy Inc | 990 | Chair(Thru 9/18) Immed Past Chair | 5 | $0 | $0 | View return |
| 2018 | The Quatre Vents Foundation Inc | 990 | Trustee | 5 | $0 | $0 | View return |
| 2018 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2017 | Drayton Hall Preservation Trust | 990 | Trustee | 3 | $0 | $0 | View return |
| 2017 | The Garden Conservancy Inc | 990 | Chairman | 15 | $0 | $0 | View return |
| 2017 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2017 | The Quatre Vents Foundation Inc | 990 | Trustee | 5 | $0 | $0 | View return |
| 2017 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2016 | Drayton Hall Preservation Trust | 990 | Trustee | 3 | $0 | $0 | View return |
| 2016 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2016 | The Garden Conservancy Inc | 990 | Chairman | 15 | $0 | $0 | View return |
| 2016 | The Quatre Vents Foundation Inc | 990 | Trustee | 0.1 | $0 | $0 | View return |
| 2016 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2015 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2015 | The Garden Conservancy Inc | 990 | Chairman | 10 | $0 | $0 | View return |
| 2015 | Drayton Hall Preservation Trust | 990 | Trustee | 3 | $0 | $0 | View return |
| 2015 | Drayton Hall Preservation Trust | 990 | Trustee | 3 | $0 | $0 | View return |
| 2015 | The Quatre Vents Foundation Inc | 990 | Trustee | 0 | $0 | $0 | View return |
| 2015 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.5 | $0 | $0 | View return |
| 2014 | The Garden Conservancy Inc | 990 | Chairman | 10 | $0 | $0 | View return |
| 2014 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2014 | The Chicago Academy of Sciences | 990 | Life Trustee | 0.1 | $0 | $0 | View return |
| 2014 | The Quatre Vents Foundation Inc | 990 | Trustee | 0 | $0 | $0 | View return |
| 2013 | The Garden Conservancy Inc | 990 | Chairman | 10 | $0 | $0 | View return |
| 2013 | Chicago Horticultural Society | 990 | Board Member | 2 | $0 | $0 | View return |
| 2013 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2013 | The Quatre Vents Foundation Inc | 990 | Trustee | 0 | $0 | $0 | View return |
| 2012 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | - | View return |
| 2011 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |
| 2010 | Lenhardt Foundation | 990PF | Dir/Pres. - Part Time | 0 | $0 | $0 | View return |