| 2024 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2024 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2023 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2023 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2022 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2022 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2021 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2021 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2020 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2020 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2019 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2019 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2017 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2017 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2016 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2016 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2015 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2015 | Earth Sciences Foundation | 990PF | Secretary | 0.5 | $0 | $0 | View return |
| 2014 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2013 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2012 | Perrott Family Charitable Foundation | 990PF | Treasurer | 1 | $0 | $0 | View return |