| 2024 | Virginia Friedhofer Charitable Trust | 990PF | Trustee | 20 | $174,447 | $0 | View return |
| 2024 | Schlum Charitable Trust | 990PF | Trustee | 5 | $140,381 | $0 | View return |
| 2024 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2024 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Virginia Friedhofer Charitable Trust | 990PF | Trustee | 20 | $187,975 | $0 | View return |
| 2023 | Schlum Charitable Trust | 990PF | Trustee | 5 | $154,175 | $0 | View return |
| 2023 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2023 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2023 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2023 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2023 | American Society for Technion - Israel Institute for Technology Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Virginia Friedhofer Charitable Trust | 990PF | Trustee | 20 | $182,017 | $0 | View return |
| 2022 | Schlum Charitable Trust | 990PF | Trustee | 5 | $145,258 | $0 | View return |
| 2022 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2022 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2022 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2022 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | American Society for Technion - Israel Institute for Technology Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Virginia Friedhofer Charitable Trust | 990PF | Trustee | 20 | $174,809 | $0 | View return |
| 2021 | Schlum Charitable Trust | 990PF | Trustee | 5 | $142,985 | $0 | View return |
| 2021 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2021 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2021 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2021 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2021 | American Society for Technion - Israel Institute for Technology Inc | 990 | Board Member | 5 | $0 | $0 | View return |
| 2020 | Virginia Friedhofer Charitable Trust | 990PF | Trustee | 20 | $140,639 | $0 | View return |
| 2020 | Schlum Charitable Trust | 990PF | Trustee | 5 | $118,214 | $0 | View return |
| 2020 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2020 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2020 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2020 | American Society for Technion - Israel Institute for Technology Inc | 990 | Board Member | 5 | $0 | $0 | View return |
| 2020 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2019 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2019 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2019 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2019 | American Society for Technion - Israel Institute for Technology Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2018 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2018 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2018 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2018 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2017 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2017 | Discovery Eye Foundation | 990 | Treasurer | 0.5 | $0 | $0 | View return |
| 2017 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2017 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2017 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2017 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2016 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2016 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | $0 | View return |
| 2016 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2016 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2016 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2015 | Association for Professionals in Infection Ctrl & Epidemiology Inc | 990 | 0017-President-Elect | 2 | $0 | $0 | View return |
| 2015 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2015 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2014 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2014 | Association for Professionals in Infection Ctrl & Epidemiology Inc | 990 | 017-Secretary | 2 | - | - | View return |
| 2014 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2014 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | $0 | $0 | View return |
| 2014 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | - | View return |
| 2013 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2013 | Discovery Eye Foundation | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2013 | American Society for Technion - Israel Institute for Technology Inc | 990 | Vice Chairman | 1 | - | - | View return |
| 2013 | Los Angeles Opera Company | 990 | Director | 2 | $0 | $0 | View return |
| 2012 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2012 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | - | View return |
| 2011 | The Seidel Family Foundation | 990PF | President | 0 | $0 | - | View return |
| 2011 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | - | View return |
| 2010 | The Bogart-Hirshon Foundation | 990PF | Secretary | 0 | $0 | - | View return |