| 2022 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2022 | The Heritage Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2022 | Cold Spring Harbor Laboratory | 990 | Trustee (Until 11/2022) | 40 | $0 | $0 | View return |
| 2022 | New York Historical Society | 990 | Trustee (End 9/2022) | 1 | $0 | $0 | View return |
| 2021 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Heritage Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2021 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2021 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2020 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | The Heritage Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2020 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Norton Museum of Art Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2019 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2019 | The Heritage Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2019 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Norton Museum of Art Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2018 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2018 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Heritage Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2018 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Norton Museum of Art Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2017 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2017 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Heritage Foundation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2017 | Norton Museum of Art Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2017 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | The Heritage Foundation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2016 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2016 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Norton Museum of Art Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | The Heritage Foundation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2015 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2015 | Marine Corps University Foundation Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Heritage Foundation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2014 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2014 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Cold Spring Harbor Laboratory | 990 | Trustee (From 11/2013) | 1 | - | - | View return |
| 2013 | The Heritage Foundation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2013 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2013 | New York Historical Society | 990 | Trustee | 1 | $0 | $0 | View return |
| 2012 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | - | View return |
| 2011 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2010 | Ivor Foundation C/O Ivor & Co LLC | 990PF | President/Treasurer | 0 | $0 | $0 | View return |