| 2021 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2019 | North Country Library System | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Desert Water Supply Corporation | 990 | Director | 4 | $0 | $0 | View return |
| 2019 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2019 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | North Country Library System | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Desert Water Supply Corporation | 990 | Director | 4 | $0 | $0 | View return |
| 2018 | Isle Royale & Kewenew Parks Associ | 990 | Director And Executive Committee Member | 1.2 | $0 | $0 | View return |
| 2018 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2018 | T a Yacht Club Inc | 990EZ | Vice Commodo | 0 | $0 | - | View return |
| 2017 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2017 | Desert Water Supply Corporation | 990 | Director | 4 | $0 | $0 | View return |
| 2017 | Isle Royale & Kewenew Parks Associ | 990 | Executive Committee Member | 1.15 | $0 | $0 | View return |
| 2017 | North Country Library System | 990 | President | 1 | $0 | $0 | View return |
| 2017 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2016 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2016 | Desert Water Supply Corporation | 990 | Director | 4 | $0 | $0 | View return |
| 2016 | North Country Library System | 990 | President | 1 | $0 | $0 | View return |
| 2016 | Isle Royale & Kewenew Parks Associ | 990EZ | Director (Board President 1/1-7/31) | 2.31 | $0 | $0 | View return |
| 2016 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2015 | North Country Library System | 990 | President | 0 | $0 | $0 | View return |
| 2015 | Indiana Dressage Society | 990EZ | Director | 3 | $0 | $0 | View return |
| 2015 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2015 | Isle Royale & Kewenew Parks Associ | 990EZ | Board President | 2 | $0 | $0 | View return |
| 2015 | Desert Water Supply Corporation | 990 | Director | 4 | $0 | $0 | View return |
| 2015 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2014 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2014 | Isle Royale & Kewenew Parks Associ | 990EZ | Board President | 3 | $0 | $0 | View return |
| 2014 | North Country Library System | 990 | Vice-President | 0 | $0 | $0 | View return |
| 2014 | Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2013 | North Country Library System | 990 | Vice-President | 0 | $0 | $0 | View return |
| 2013 | Hawn Memorial Library | 990 | President | 1 | $0 | $0 | View return |
| 2013 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2013 | Olive Branch Old Towne Preservation and Development Association | 990EZ | Director | 1 | $0 | - | View return |
| 2012 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2011 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2010 | The Robert and Cynthia Marr Charitable Foundation | 990PF | Trustee | 0 | $0 | $0 | View return |