| 2025 | Northwest Nebraska Development Corp | 990 | Director | - | $0 | $0 | View return |
| 2024 | George and Adele Klein Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2024 | Northwest Nebraska Development Corp | 990 | Director | - | $0 | $0 | View return |
| 2024 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2024 | The Bokom Foundation Inc | 990PF | President | 0 | $0 | $0 | View return |
| 2024 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2024 | The Jolly Boys of Williamsville New York Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2024 | United Nations Development Corporation | 990 | Chairman | 15 | $0 | $0 | View return |
| 2023 | The Bokom Foundation Inc | 990PF | Presedent | 0 | $0 | $0 | View return |
| 2023 | George and Adele Klein Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2023 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2023 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Northwest Nebraska Development Corp | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | The Jolly Boys of Williamsville New York Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2023 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2023 | United Nations Development Corporation | 990 | Chairman | 15 | $0 | $0 | View return |
| 2023 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2023 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2022 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2022 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2022 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2022 | The Bokom Foundation Inc | 990PF | Presedent | 0 | $0 | $0 | View return |
| 2022 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2022 | United Nations Development Corporation | 990 | Chairman | 15 | $0 | $0 | View return |
| 2022 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2022 | The Jolly Boys of Williamsville New York Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2022 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2021 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $813 | $0 | View return |
| 2021 | United Nations Development Corporation | 990 | Chairman | 3 | $0 | $0 | View return |
| 2021 | The Real Estate Board of New York Inc | 990 | Member At La | 0.5 | $0 | $0 | View return |
| 2021 | The Bokom Foundation Inc | 990PF | Presedent | 0 | $0 | $0 | View return |
| 2021 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2021 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2021 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2020 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $800 | $0 | View return |
| 2020 | The Real Estate Board of New York Inc | 990 | Member At La | 0.5 | $0 | $0 | View return |
| 2020 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2020 | The Jolly Boys of Williamsville New York Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2020 | United Nations Development Corporation | 990 | Chairman | 3 | $0 | $0 | View return |
| 2020 | The Bokom Foundation Inc | 990PF | Presedent | 0 | $0 | $0 | View return |
| 2020 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2020 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2019 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $1,550 | $0 | View return |
| 2019 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | The Bokom Foundation Inc | 990PF | President Treasurer | 0 | $0 | $0 | View return |
| 2019 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | United Nations Development Corporation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2019 | The Real Estate Board of New York Inc | 990 | Member At La | 0.5 | $0 | $0 | View return |
| 2019 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2019 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2019 | George and Adele Klein Foundation | 990PF | President | 0 | $0 | $0 | View return |
| 2018 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $1,150 | $0 | View return |
| 2018 | The Bokom Foundation Inc | 990PF | President Treasurer | 0 | $0 | $0 | View return |
| 2018 | George and Adele Klein Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2018 | United Nations Development Corporation | 990 | Chairman | 2 | $0 | $0 | View return |
| 2018 | Citizens for Rockland Water | 990PF | Director | 0.9 | $0 | $0 | View return |
| 2018 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2018 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2018 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2017 | George and Adele Klein Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Bokom Foundation Inc | 990PF | President Treasurer | 0 | $0 | $0 | View return |
| 2017 | United Nations Development Corporation | 990 | Director/Chairman | 2 | $0 | $0 | View return |
| 2017 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2017 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2017 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2017 | George and Adele Klein Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2017 | Citizens for Rockland Water | 990PF | Director | 0.9 | $0 | $0 | View return |
| 2017 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2017 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2016 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | United Nations Development Corporation | 990 | Director/Chairman | 2 | $0 | $0 | View return |
| 2016 | The Bokom Foundation Inc | 990PF | President Treasurer | 0 | $0 | $0 | View return |
| 2016 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2016 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Community Watersheds Clean Water Coalition Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2016 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2016 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2016 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2015 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2015 | The Bokom Foundation Inc | 990PF | President Treasurer | 0 | $0 | $0 | View return |
| 2015 | Community Watersheds Clean Water Coalition Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2015 | Museum Association of the American Frontier | 990 | Treasurerdirector | 2 | $0 | $0 | View return |
| 2015 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | George and Adele Klein Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2015 | United Nations Development Corporation | 990 | Director/Chairman | 2 | $0 | $0 | View return |
| 2015 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2015 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2014 | Community Watersheds Clean Water Coalition Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2014 | Rockwell Springs Trout Club | 990 | Trustee | 0 | $0 | $0 | View return |
| 2014 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Stephen and Regina Klein Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2014 | United Nations Development Corporation | 990 | Director/Chairman | 2 | $0 | $0 | View return |
| 2014 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Cleveland Museum of Natural History | 990 | Honorary | 1 | $0 | $0 | View return |
| 2014 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2013 | Winous Point Marsh Conservancy | 990 | Secretary | 4 | $0 | $0 | View return |
| 2013 | United Nations Development Corporation | 990 | Director/Chairman | 2 | $0 | $0 | View return |
| 2013 | Republican Jewish Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2013 | Rockwell Springs Trout Club | 990 | Trustee | 0 | $0 | $0 | View return |
| 2013 | University of the Southwest | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Museum of Jewish Heritage a Living Memorial to the Holocaust | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2013 | The Real Estate Board of New York Inc | 990 | Member Bd Go | 0.25 | $0 | $0 | View return |
| 2013 | Stephen and Regina Klein Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2013 | Cleveland Museum of Natural History | 990 | Standing Trustee | 1 | $0 | $0 | View return |
| 2012 | Stephen and Regina Klein Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2011 | Stephen and Regina Klein Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |