| 2024 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2024 | Solomon R Guggenheim Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2024 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2024 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2024 | Marina Kellen French Foundation Inc. | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2024 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2024 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2023 | Marina Kellen French Foundation Inc. | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2023 | Solomon R Guggenheim Foundation | 990 | Trustee | 3 | $0 | $0 | View return |
| 2023 | Seventh Regiment Armory Conservancy Inc. | 990 | Director (Thru 12/2023) | 1 | $0 | $0 | View return |
| 2023 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2023 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2023 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2023 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2022 | Knickerbocker Club Inc | 990 | Board Of Governor | 3 | $0 | $0 | View return |
| 2022 | Seventh Regiment Armory Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Solomon R Guggenheim Foundation | 990 | Trustee | 3 | $0 | $0 | View return |
| 2022 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2022 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2022 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2022 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2022 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Seventh Regiment Armory Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Knickerbocker Club Inc | 990 | Board Of Governor | 3 | $0 | $0 | View return |
| 2021 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2021 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2021 | Solomon R Guggenheim Foundation | 990 | Trustee | 3 | $0 | $0 | View return |
| 2021 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2021 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2021 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Seventh Regiment Armory Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2020 | Solomon R Guggenheim Foundation | 990 | Trustee | 3 | $0 | $0 | View return |
| 2020 | The Scenic Hudson Land Trust Inc | 990 | Director (Outgoing) | 1 | $0 | $0 | View return |
| 2020 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2020 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2020 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Knickerbocker Club Inc | 990 | Board Member | 3 | $0 | $0 | View return |
| 2020 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2020 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Knickerbocker Club Inc | 990 | Board Member | 3 | $0 | $0 | View return |
| 2019 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2019 | Seventh Regiment Armory Conservancy Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2019 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2019 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2019 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2018 | Seventh Regiment Armory Conservancy Inc. | 990 | Director (Appointed 12/11/18) | 1 | $0 | $0 | View return |
| 2018 | Internatl Soc for Neurochemistry Inc Co Sumner Fein CPA | 990 | Council Member | 0 | $0 | $0 | View return |
| 2018 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2018 | Rotary International Sandusky Ohio | 990EZ | Director | 1 | $0 | $0 | View return |
| 2018 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2018 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2017 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2017 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Internatl Soc for Neurochemistry Inc Co Sumner Fein CPA | 990 | Council Member | 0 | $0 | $0 | View return |
| 2017 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2017 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2016 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Internatl Soc for Neurochemistry Inc Co Sumner Fein CPA | 990 | Council Member | 0 | $0 | $0 | View return |
| 2016 | The 1971 Foundation Inc. | 990PF | President | 0.1 | $0 | $0 | View return |
| 2016 | Sandusky Rotary Club Charitable Fund Inc. | 990EZ | Trustee | 1 | $0 | - | View return |
| 2016 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2016 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The Scenic Hudson Land Trust Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Internatl Soc for Neurochemistry Inc Co Sumner Fein CPA | 990 | Council Member | 0 | $0 | $0 | View return |
| 2015 | Sandusky Rotary Club Charitable Fund Inc. | 990EZ | Trustee | 1 | $0 | - | View return |
| 2015 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0.1 | $0 | $0 | View return |
| 2015 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2014 | New York CIVIC Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2014 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Rotary International Sandusky Ohio | 990EZ | Past President | 1 | $0 | $0 | View return |
| 2014 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2014 | Sandusky Rotary Club Charitable Fund Inc. | 990EZ | Trustee | 1 | $0 | - | View return |
| 2014 | Bard College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Bard College Berlin a Liberal Arts University Ggmbh | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Anna Maria and Stephen Kellen Foundation Inc. | 990PF | Secretary/Treasurer | 5 | $0 | $0 | View return |
| 2013 | Rotary International Sandusky Ohio | 990EZ | President | 4 | $0 | $0 | View return |
| 2013 | American Council on Germany Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2013 | New York CIVIC Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2013 | American Academy in Berlin Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2011 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2010 | Marina Kellen French Tr Foundation | 990PF | Treasurer | 0 | $0 | $0 | View return |