| 2024 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2024 | Restore Hetch Hetchy | 990EZ | Board Member | 1 | $0 | - | View return |
| 2023 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2023 | San Francisco Estuary Institute | 990 | Chair | 1 | $0 | $0 | View return |
| 2022 | Restore Hetch Hetchy | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Water Education Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2022 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2022 | San Francisco Estuary Institute | 990 | Chairman | 1 | $0 | $0 | View return |
| 2021 | Restore Hetch Hetchy | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2021 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2020 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2020 | Restore Hetch Hetchy | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2019 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2019 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2018 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2018 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2017 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2017 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2016 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2016 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2016 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2015 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2015 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | San Francisco Estuary Institute | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2014 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2014 | Restore Hetch Hetchy | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2012 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary | 0.5 | $0 | $0 | View return |
| 2011 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, V.P., Secretary , | 0.5 | $0 | $0 | View return |
| 2010 | Thomas R and Ann L Hayden Family Foundation | 990PF | Director, Vice-President, Secretary | 0 | $0 | $0 | View return |