| 2024 | Mt. Cuba Center Inc. | 990PF | Manager | 1 | $0 | $0 | View return |
| 2024 | Blitzer Family Foundation | 990PF | President | 0.75 | $0 | $0 | View return |
| 2023 | Blitzer Family Foundation | 990PF | President | 0.75 | $0 | $0 | View return |
| 2023 | Mt. Cuba Center Inc. | 990PF | Manager | 1 | $0 | $0 | View return |
| 2023 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2023 | Metropolitan Oval Foundation Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2022 | The Blackstone Charitable Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2022 | Mt. Cuba Center Inc. | 990PF | Manager | 1 | $0 | $0 | View return |
| 2022 | Blitzer Family Foundation | 990PF | President | 0.75 | $0 | $0 | View return |
| 2022 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2021 | Blitzer Family Foundation | 990PF | President | 0.75 | $0 | $0 | View return |
| 2021 | Mt. Cuba Center Inc. | 990PF | Manager | 1 | $0 | $0 | View return |
| 2021 | The Blackstone Charitable Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2021 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2021 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2021 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2020 | Blitzer Family Foundation | 990PF | President | 0.75 | $0 | $0 | View return |
| 2020 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2020 | Eastern Shore Land Conservancy Inc. | 990 | Chair | 1 | $0 | $0 | View return |
| 2020 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2020 | The Blackstone Charitable Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2019 | Blitzer Family Foundation | 990PF | President - As Needed | 0 | $0 | $0 | View return |
| 2019 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2019 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2019 | The Blackstone Charitable Foundation | 990PF | Director (As Of 9/2019) | 1 | $0 | $0 | View return |
| 2019 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Chesapeake Bay Maritime Museum Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Blitzer Family Foundation | 990PF | President - As Needed | 0 | $0 | $0 | View return |
| 2018 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2018 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Metropolitan Oval Foundation Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2018 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Chesapeake Bay Maritime Museum Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Blitzer Family Foundation | 990PF | President - As Needed | 0 | $0 | $0 | View return |
| 2017 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2017 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2017 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Metropolitan Oval Foundation Inc. | 990 | Director | 0 | $0 | $0 | View return |
| 2017 | Trustees of the University of Pennsylvania | 990 | Trustee | 3 | $0 | $0 | View return |
| 2017 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Blitzer Family Foundation | 990PF | President - As Needed | 0 | $0 | $0 | View return |
| 2016 | Riverdale Country School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2016 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Blitzer Family Foundation | 990PF | President - As Needed | 0 | $0 | $0 | View return |
| 2015 | Devils Care Foundation Inc F/K/A New Jersey Devils Foundation Inc | 990PF | Board Chair/Trustee | 1 | $0 | $0 | View return |
| 2015 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Riverdale Country School Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Devils Care Foundation Inc F/K/A New Jersey Devils Foundation Inc | 990PF | Chair | 1 | $0 | $0 | View return |
| 2014 | Devils Care Foundation Inc F/K/A New Jersey Devils Foundation Inc | 990PF | Board Chair/Trustee | 1 | $0 | - | View return |
| 2014 | Riverdale Country School Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Devils Care Foundation Inc F/K/A New Jersey Devils Foundation Inc | 990PF | Board Chair/Trustee | 1 | $0 | $0 | View return |
| 2013 | Harlem Rbi Incorporated | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Riverdale Country School Inc. | 990 | Board | 1 | $0 | $0 | View return |