| 2024 | Ron and Lydia Harrington Family Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2024 | Cloud County Health Center Inc | 990 | CFO | 40 | $0 | $0 | View return |
| 2024 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2024 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2024 | Middle Country Library Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Ron and Lydia Harrington Family Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2023 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2023 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2023 | Cloud County Health Center Inc | 990 | CFO | 40 | $0 | $0 | View return |
| 2023 | Middle Country Library Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2022 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2022 | Middle Country Library Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Ron and Lydia Harrington Family Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2022 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Lincoln Center for the Performing Arts Inc. | 990 | Director Thru 11/8/2022 | 1 | $0 | $0 | View return |
| 2021 | Cloud County Health Center Inc | 990 | CFO | 40 | $0 | $0 | View return |
| 2021 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2021 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2021 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Middle Country Library Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Cloud County Health Center Inc | 990 | CFO | 40 | $0 | $0 | View return |
| 2020 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2020 | The Harrington Family Foundation | 990PF | Trustee | 5 | $0 | $0 | View return |
| 2020 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Old Trail School | 990 | Trustee | 0.5 | $0 | $0 | View return |
| 2018 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Horatio Alger Association of Distinguished Americans Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Lincoln Center for the Performing Arts Inc. | 990 | Director | 1 | $0 | $0 | View return |