| 2024 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2024 | Elkhorn Slough Foundation | 990 | Trustee (Until 01/08/25) | 1 | $0 | $0 | View return |
| 2023 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2023 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2022 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2021 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2019 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Association for the Improvement of American Infrastructure | 990 | Director | 0.5 | $0 | $0 | View return |
| 2018 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Elkhorn Slough Foundation | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2017 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2017 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2016 | Marshall Family Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2016 | Association for the Improvement of American Infrastructure | 990 | Director | 0.5 | $0 | $0 | View return |
| 2016 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2015 | Association for the Improvement of American Infrastructure | 990 | Director | 0.5 | $0 | $0 | View return |
| 2015 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2014 | Miles Elderly Housing Inc | 990 | Treasurer | 0 | $0 | $0 | View return |
| 2014 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |
| 2013 | Miles Elderly Housing Inc | 990 | Treasurer | 0 | $0 | $0 | View return |
| 2013 | American Road and Transportation Builders Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Elkhorn Slough Foundation | 990 | Trustee | 2 | $0 | $0 | View return |