| 2024 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2024 | International Sea Level Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2023 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2023 | International Sea Level Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2022 | Colorado Uplift Inc | 990 | Advisory Director | 1 | $0 | $0 | View return |
| 2022 | International Sea Level Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2021 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2021 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2021 | International Sea Level Institute | 990EZ | Director | 1 | $0 | $0 | View return |
| 2021 | Colorado Uplift Inc | 990 | Advisory Director | 1 | $0 | $0 | View return |
| 2020 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2020 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2019 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2019 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2019 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | The J Mark Grosvenor Foundation | 990PF | President | 3 | $12,000 | $0 | View return |
| 2018 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2018 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2017 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2017 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2016 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2016 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2015 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2015 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2014 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2014 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2013 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2013 | Colorado Uplift Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2012 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2011 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2011 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |
| 2010 | The J Mark Grosvenor Foundation | 990PF | President | 1 | $12,000 | $0 | View return |
| 2010 | Grosvenor Foundation | 990PF | Vice President & Director | 1 | $0 | $0 | View return |