| 2023 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2022 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2022 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2021 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2020 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | The Posse Foundation Inc. | 990 | Trustee (Outgoing) | 3 | $0 | $0 | View return |
| 2019 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2018 | The Posse Foundation Inc. | 990 | Trustee | 3 | $0 | $0 | View return |
| 2017 | The Posse Foundation Inc. | 990 | Trustee | 3 | $0 | $0 | View return |
| 2017 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2017 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | The Posse Foundation Inc. | 990 | Trustee | 0.2 | $0 | $0 | View return |
| 2016 | Mass General Brigham Incorporated | 990 | Director (As Of 07/01/2017) | 1 | $0 | $0 | View return |
| 2016 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Title | 1 | $0 | $0 | View return |
| 2015 | The Posse Foundation Inc. | 990 | Trustee | 0.2 | $0 | $0 | View return |
| 2015 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2014 | The Posse Foundation Inc. | 990 | Trustee | 0.2 | $0 | $0 | View return |
| 2013 | The Posse Foundation Inc. | 990 | Trustee | 0.2 | $0 | $0 | View return |