| 2024 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Anti-Defamation League | 990 | CEO & National Director | 34 | $1,020,747 | $180,131 | View return |
| 2023 | The University of Connecticut Foundation | 990 | Interim President & CEO (Thru 3/24) | 40 | $213,246 | $0 | View return |
| 2023 | Anti-Defamation League Foundation | 990 | CEO & National Director | 6 | $180,131 | $1,020,747 | View return |
| 2023 | Anti-Defamation League | 990 | CEO & National Director | 34 | $0 | $0 | View return |
| 2023 | The Leadership Conference on CIVIL and Human Rights Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The Asian American Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2023 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2023 | Anti-Defamation League Foundation | 990 | CEO & National Director | 6 | $0 | $0 | View return |
| 2023 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Anti-Defamation League | 990 | CEO & National Director | 34 | $993,249 | $175,278 | View return |
| 2022 | Anti-Defamation League Foundation | 990 | CEO & National Director | 6 | $175,278 | $993,249 | View return |
| 2022 | Bbfg Foundation Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | The Asian American Foundation | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2022 | The Leadership Conference on CIVIL and Human Rights Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | The University of Connecticut Foundation | 990 | See Schedule O For Title | 40 | $0 | $0 | View return |
| 2022 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Anti-Defamation League Foundation | 990 | Trustee (Thru 11/2021) | 20 | $575,716 | $575,716 | View return |
| 2021 | Anti-Defamation League | 990 | CEO & National Director | 20 | $575,716 | $575,716 | View return |
| 2021 | The Asian American Foundation | 990 | Director | 10 | $0 | $0 | View return |
| 2021 | The Leadership Conference on CIVIL and Human Rights Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2021 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | The University of Connecticut Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Anti-Defamation League Foundation | 990 | Trustee | 20 | $453,496 | $453,496 | View return |
| 2020 | Anti-Defamation League | 990 | CEO & National Director | 20 | $453,496 | $453,496 | View return |
| 2020 | Philadelphia Film Society | 990 | Executive Director | 40 | $181,923 | $0 | View return |
| 2020 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2020 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Anti-Defamation League Foundation | 990 | Trustee | 20 | $417,699 | $417,699 | View return |
| 2019 | Anti-Defamation League | 990 | CEO & National Director | 20 | $417,699 | $417,699 | View return |
| 2019 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2019 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | The University of Connecticut Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Anti-Defamation League | 990 | CEO & National Director | 20 | $382,523 | $382,522 | View return |
| 2018 | Anti-Defamation League Foundation | 990 | Trustee | 20 | $382,522 | $382,523 | View return |
| 2018 | Stempler Family Foundation Care of Kozusko Harris Duncan | 990 | Director | 0 | $0 | $0 | View return |
| 2018 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | The University of Connecticut Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Anti-Defamation League Foundation | 990 | Trustee | 20 | $480,341 | $480,339 | View return |
| 2017 | Anti-Defamation League | 990 | CEO/National Director | 20 | $480,339 | $480,341 | View return |
| 2017 | The University of Connecticut Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Memorial Foundation for Jewish Culture | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Anti-Defamation League Foundation | 990 | Trustee | 20 | $272,721 | $272,720 | View return |
| 2016 | Anti-Defamation League | 990 | CEO/National Director | 20 | $272,720 | $272,721 | View return |
| 2016 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | The University of Connecticut Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Anti-Defamation League | 990 | CEO/Nat'L Director (As Of 7/15 | 20 | $168,665 | $168,665 | View return |
| 2015 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Military Bowl Foundation Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Lawyers' Committee for CIVIL Rights | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Lawyers' Committee for CIVIL Rights | 990 | Director | 1 | $0 | $0 | View return |