| 2024 | Mpt Foundation Inc C/O S Schwertman | 990 | Past President | 40 | $280,644 | $0 | View return |
| 2024 | Owings Mills Corporate Roundtable Inc | 990EZ | Immediate Past Chairman | 0.5 | $0 | $0 | View return |
| 2024 | Association of Public Television Stations | 990 | Board Member | 1 | $0 | $0 | View return |
| 2024 | Apts Action Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2024 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2024 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $326,158 | View return |
| 2023 | Apts Action Inc | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Owings Mills Corporate Roundtable Inc | 990EZ | Immediate Past Chairman | 0.5 | $0 | $0 | View return |
| 2023 | Association of Public Television Stations | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2022 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $297,287 | View return |
| 2022 | Owings Mills Corporate Roundtable Inc | 990EZ | Past Chairman | 0.5 | $0 | $0 | View return |
| 2022 | Association of Public Television Stations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Apts Action Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2022 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $297,287 | View return |
| 2021 | Owings Mills Corporate Roundtable Inc | 990EZ | Past Chairman | 0.5 | $0 | $0 | View return |
| 2021 | Association of Public Television Stations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Apts Action Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2021 | Eastern Educational Television Network Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $258,832 | View return |
| 2020 | Owings Mills Corporate Roundtable Inc | 990EZ | Chairman | 0.5 | $0 | $0 | View return |
| 2020 | Association of Public Television Stations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Apts Action Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Eastern Educational Television Network Inc. | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2020 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2020 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $253,564 | View return |
| 2019 | Association of Public Television Stations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Owings Mills Corporate Roundtable Inc | 990EZ | Chairman | 0.5 | $0 | $0 | View return |
| 2019 | Apts Action Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Director, Treasurer | 3 | $0 | $0 | View return |
| 2019 | Eastern Educational Television Network Inc. | 990 | Chair | 1 | $0 | $0 | View return |
| 2018 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $244,740 | View return |
| 2018 | Association of Public Television Stations | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Owings Mills Corporate Roundtable Inc | 990EZ | Chairman | 0.5 | $0 | $0 | View return |
| 2018 | Apts Action Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Eastern Educational Television Network Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | National Educational Telecommunications Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Mpt Foundation Inc C/O S Schwertman | 990 | President | 1 | $0 | $244,291 | View return |
| 2017 | Owings Mills Corporate Roundtable Inc | 990EZ | Chairman | 0.5 | $0 | $0 | View return |
| 2017 | Eastern Educational Television Network Inc. | 990 | Trustee | 0 | $0 | $0 | View return |
| 2016 | Mpt Foundation Inc C/O S Schwertman | 990 | Ex Officio, President | 1 | $0 | $238,758 | View return |
| 2016 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Vice President | 0 | $0 | - | View return |
| 2016 | Owings Mills Corporate Roundtable Inc | 990EZ | Secretary | 0.5 | $0 | $0 | View return |
| 2016 | Eastern Educational Television Network Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Mpt Foundation Inc C/O S Schwertman | 990 | Ex Officio, President | 1 | $0 | $231,801 | View return |
| 2015 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Vice President | 0 | $0 | - | View return |
| 2015 | Eastern Educational Television Network Inc. | 990 | Chair Emeritus | 1 | $0 | $0 | View return |
| 2014 | National Mah Jongg League Foundation Inc Co Samuel Greenberg & Company | 990PF | Vice President | 0 | $0 | - | View return |
| 2014 | Eastern Educational Television Network Inc. | 990 | Chair | 1 | $0 | $0 | View return |
| 2013 | Eastern Educational Television Network Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |