| 2024 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2024 | Anderson Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2024 | Columbia County Habitat for Humanity Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2023 | Anderson Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2023 | Columbia County Habitat for Humanity Inc | 990 | Director | 2 | $0 | $0 | View return |
| 2022 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2022 | Anderson Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2022 | Columbia County Legal Aid Inc. | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2021 | Columbia County Legal Aid Inc. | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2021 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2021 | Anderson Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | Columbia County Legal Aid Inc. | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2020 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | Anderson Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2019 | Us District Court of Oregon Historical Society | 990EZ | Director | 0.25 | $0 | $0 | View return |
| 2019 | Columbia County Legal Aid Inc. | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2019 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | Us District Court of Oregon Historical Society | 990EZ | Director/Secretary | 2 | $0 | $0 | View return |
| 2018 | Cedar City Music Arts Association | 990EZ | Board | 1 | $0 | - | View return |
| 2017 | Us District Court of Oregon Historical Society | 990EZ | Director/Secretary | 2 | $0 | $0 | View return |
| 2017 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2017 | Cedar City Music Arts Association | 990EZ | Board | 1 | $0 | - | View return |
| 2016 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2016 | Cedar City Music Arts Association | 990EZ | Board | 1 | $0 | - | View return |
| 2016 | Us District Court of Oregon Historical Society | 990EZ | Secretary | 2 | $0 | $0 | View return |
| 2015 | Cedar City Music Arts Association | 990EZ | Board | 2 | $0 | - | View return |
| 2015 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2014 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2013 | Center for Childhood Safety Inc. | 990EZ | Secretary | 1 | $0 | $0 | View return |
| 2013 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0.5 | $0 | $0 | View return |
| 2012 | Mary Anne K and William R Anderson Jr Foundation | 990PF | Trustee | 0.5 | $0 | $0 | View return |