| 2025 | Rdm Foundation | 990PF | President/Director | 1 | $0 | $0 | View return |
| 2025 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2024 | Children'S Tumor Foundation | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2024 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2024 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2024 | Jewish Federation of Cleveland | 990 | Trustee | 0.7 | $0 | $0 | View return |
| 2023 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2023 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2023 | Children'S Tumor Foundation | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2023 | Jewish Federation of Cleveland | 990 | Trustee | 0.8 | $0 | $0 | View return |
| 2022 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2022 | Children'S Tumor Foundation | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2022 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2022 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2021 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2021 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2021 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2021 | Children'S Tumor Foundation | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2020 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2020 | Children'S Tumor Foundation | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2020 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2020 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2019 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2019 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2019 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2019 | Children'S Tumor Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2018 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2018 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2018 | Children'S Tumor Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2018 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2018 | Jewish Federation of Cleveland | 990 | Trustee/Vice Chair Thru 4/30/19 | 0.9 | $0 | $0 | View return |
| 2017 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2017 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2017 | Children'S Tumor Foundation | 990 | Chairperson | 1 | $0 | $0 | View return |
| 2017 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2017 | Jewish Federation of Cleveland | 990 | Trustee/V Chair | 0.9 | $0 | $0 | View return |
| 2016 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2016 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2016 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2016 | Children'S Tumor Foundation | 990 | Chairperson | 1 | $0 | $0 | View return |
| 2016 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Tr | 1 | $0 | $0 | View return |
| 2016 | Jewish Federation of Cleveland | 990 | Trustee/V Chair | 1.9 | $0 | $0 | View return |
| 2015 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Tr | 1 | $0 | $0 | View return |
| 2015 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2015 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2015 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2015 | Jewish Federation of Cleveland | 990 | Trustee/Vice Chair 4/2016 | 0.9 | $0 | $0 | View return |
| 2014 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2014 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2014 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2014 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Tr | 1 | $0 | $0 | View return |
| 2014 | Jewish Federation of Cleveland | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2013 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2013 | Rdm Foundation | 990PF | President | 1 | $0 | $0 | View return |
| 2013 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Tr | 1 | $0 | $0 | View return |
| 2013 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2013 | Jewish Federation of Cleveland | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2012 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President/Trustee | 1 | $0 | $0 | View return |
| 2012 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Trustee | 1 | $0 | $0 | View return |
| 2012 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2011 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Trustee | 1 | $0 | - | View return |
| 2011 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2011 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President / Trustee | 1 | $0 | - | View return |
| 2010 | The Leonard and Joan Horvitz Foundation | 990PF | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2010 | Richard Horvitz and Erica Hartman-Horvitz Foundation | 990PF | President / Trustee | 1 | $0 | - | View return |
| 2010 | The Jeffrey Horvitz Foundation | 990PF | Secretary / Treasurer / Trustee | 1 | $0 | - | View return |