| 2024 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $9,735 | - | View return |
| 2024 | Boston Woodwind Society Inc | 990EZ | Chairman | 1 | $0 | $0 | View return |
| 2023 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $9,073 | - | View return |
| 2023 | Boston Woodwind Society Inc | 990EZ | Chairman | 1 | $0 | $0 | View return |
| 2022 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $29,820 | $0 | View return |
| 2022 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $9,237 | - | View return |
| 2022 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $9,237 | - | View return |
| 2022 | Boston Woodwind Society Inc | 990EZ | Director | 1 | $0 | - | View return |
| 2021 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $36,052 | $0 | View return |
| 2021 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $10,271 | $0 | View return |
| 2021 | Boston Woodwind Society Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2020 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $22,147 | $0 | View return |
| 2020 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $11,607 | $0 | View return |
| 2020 | Boston Woodwind Society Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2019 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $27,372 | $0 | View return |
| 2019 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $11,398 | $0 | View return |
| 2019 | Boston Woodwind Society Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2018 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $27,031 | $0 | View return |
| 2018 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $11,267 | $0 | View return |
| 2018 | Boston Woodwind Society Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2017 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $27,938 | $0 | View return |
| 2017 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $10,922 | $0 | View return |
| 2017 | Boston Woodwind Society Inc | 990EZ | Treasurer/Director | 1 | $0 | - | View return |
| 2016 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $28,707 | $0 | View return |
| 2016 | George B Henderson Foundation Jh5090 | 990PF | Trustee | 2 | $10,949 | $0 | View return |
| 2016 | Boston Woodwind Society Inc | 990EZ | Treasurer/Director | 1 | $0 | - | View return |
| 2015 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $20,209 | $0 | View return |
| 2014 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $67,560 | $0 | View return |
| 2013 | Henderson Foundation C/O Roberta Henderson | 990PF | Trustee | 1 | $20,279 | $0 | View return |
| 2013 | Willard House & Clock Museum Inc. | 990PF | Trustee | 0 | $0 | - | View return |
| 2013 | Friends of the Longfellow House Washingtons Headquarters Inc | 990EZ | Director | 1 | $0 | $0 | View return |
| 2012 | Willard House & Clock Museum Inc. | 990PF | Trustee | 0 | $0 | - | View return |
| 2011 | Willard House & Clock Museum Inc. | 990PF | Trustee | 0 | $0 | - | View return |
| 2010 | Willard House & Clock Museum Inc. | 990PF | Trustee | 0 | $0 | - | View return |