| 2025 | Philip Hofer Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | Philip Hofer Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2024 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2023 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | Philip Hofer Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 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 | Philip Hofer Charitable Trust | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 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 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2022 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 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 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2021 | Mass General Brigham Incorporated | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 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 |
| 2020 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2019 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | Cotting School Inc. | 990 | Treasurer | 1 | $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 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2018 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2017 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2017 | Cotting School Inc. | 990 | Treasurer | 1 | $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 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2016 | Mass General Brigham Incorporated | 990 | Director (As Of 07/01/2017) | 1 | $0 | $0 | View return |
| 2016 | Cotting School Inc. | 990 | Treasurer | 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 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2015 | Cotting School Inc. | 990 | Treasurer | 1 | $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 | Black Mountain Foundation C/O Samet & Company | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2014 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |
| 2014 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2013 | Cotting School Inc. | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2013 | Mass General Brigham Incorporated & Affiliates Group Return | 990 | See Schedule O - O & T Titles | 1 | $0 | $0 | View return |