| 2025 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2024 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2024 | Ginger Cove Foundation Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2024 | Anne Arundel County Public Library Foundation Inc. | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2024 | New Village Academy Public Charter School Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2023 | New Village Academy Public Charter School Inc. | 990 | Member, Board Of Directors | 1 | $0 | $0 | View return |
| 2023 | New Village Academy Public Charter School Inc. | 990 | Member, Board Of Directors | 1 | $0 | $0 | View return |
| 2023 | Anne Arundel County Public Library Foundation Inc. | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2023 | Ginger Cove Foundation Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2022 | Anne Arundel County Public Library Foundation Inc. | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2022 | Arts Council of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Ginger Cove Foundation Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2021 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2021 | Anne Arundel County Public Library Foundation Inc. | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2021 | Arts Council of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Capital City Cultural Arts District Annapolis Arts District | 990EZ | Director | 2 | $0 | - | View return |
| 2021 | Ginger Cove Foundation Inc. | 990 | Director | 2 | $0 | $0 | View return |
| 2020 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2020 | Arts Council of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Young Womens Christian Assoc of Annapolis & Anne Arundel Cty MD | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2019 | Arts Council of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2018 | Arts Council of Anne Arundel County Inc. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2017 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2017 | Arts Council of Anne Arundel County Inc. | 990 | Secretary | 1 | $0 | $0 | View return |
| 2016 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2016 | Arts Council of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2015 | Community Foundation of Anne Arundel County Inc. | 990 | Trustee | 5 | $0 | $0 | View return |
| 2015 | Arts Council of Anne Arundel County Inc. | 990 | Board Of Tru | 1 | $0 | $0 | View return |
| 2014 | Community Foundation of Anne Arundel County Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2014 | Arts Council of Anne Arundel County Inc. | 990 | Board Of Tru | 1 | $0 | $0 | View return |
| 2013 | Community Foundation of Anne Arundel County Inc. | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2013 | Direct Action for Youth Day Foundation of New Mexico | 990EZ | Director | 0 | $0 | - | View return |
| 2013 | The Michael M & Eve K Ossoff Foundation % Martha O Blaxall and Robert H Ossoff | 990PF | Trustee | 10 | $0 | $0 | View return |
| 2013 | Annapolis Symphony Orchestra Association Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Arts Council of Anne Arundel County Inc. | 990 | Board Of Tru | 1 | $0 | $0 | View return |
