| 2025 | The Mayer Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2024 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 8 | $5,000 | $0 | View return |
| 2024 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2024 | The Mayer Foundation | 990PF | President | 10 | $0 | $0 | View return |
| 2024 | The Mayer Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2024 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 0.5 | $0 | $0 | View return |
| 2023 | Artist-Blacksmiths Association of North America Inc. | 990 | Executive Director | 40 | $50,000 | $0 | View return |
| 2023 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 8 | $5,000 | $0 | View return |
| 2023 | The Booth-Bricker Fund | 990PF | Director | 1 | $3,000 | $0 | View return |
| 2023 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | The Mayer Foundation | 990PF | President | 10 | $0 | $0 | View return |
| 2023 | The Mayer Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 0.5 | $0 | $0 | View return |
| 2022 | The Booth-Bricker Fund | 990PF | Director | 1 | $6,000 | $0 | View return |
| 2022 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2022 | The Mayer Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2022 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 0.5 | $0 | $0 | View return |
| 2022 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Booth-Bricker Fund | 990PF | Director | 1 | $6,000 | $0 | View return |
| 2021 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2021 | Goodview Firemen'S Relief Association | 990EZ | Lieutenant | 0.5 | $0 | $0 | View return |
| 2021 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Mayer Family Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 0.5 | $0 | $0 | View return |
| 2020 | The Booth-Bricker Fund | 990PF | Director | 1 | $6,000 | $0 | View return |
| 2020 | Goodview Firemen'S Relief Association | 990EZ | Lieutenant | 0.5 | $0 | $0 | View return |
| 2020 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2020 | The Mayer Family Foundation | 990PF | Trustee/Part-Time | 1 | $0 | $0 | View return |
| 2020 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 0.5 | $0 | $0 | View return |
| 2020 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 8 | $4,500 | $0 | View return |
| 2019 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2019 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 2 | $0 | $0 | View return |
| 2019 | The Mayer Family Foundation | 990PF | Trustee/Part-Time | 0 | $0 | $0 | View return |
| 2019 | Goodview Firemen'S Relief Association | 990EZ | Lieutenant | 0.5 | $0 | $0 | View return |
| 2019 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2018 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 8 | $4,500 | $0 | View return |
| 2018 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2018 | William E Mayer Charitable Foundation Inc. | 990PF | Director | 2 | $0 | $0 | View return |
| 2018 | The Mayer Family Foundation | 990PF | Trustee/Part-Time | 0 | $0 | $0 | View return |
| 2018 | German Protestant Orphan Asylum Association | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2017 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 8 | $4,500 | $0 | View return |
| 2017 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2016 | Brentwood Volunteer Exempt Firemens Benevolent Association | 990 | Treasurer | 5 | $4,500 | $0 | View return |
| 2016 | Advanced Technology International | 990 | Director | 36 | $0 | $180,007 | View return |
| 2016 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2016 | Tolland County Agricultural Center Inc. | 990 | Treasurer | 20 | $0 | $0 | View return |
| 2016 | Pest Control Operators of California Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Kavana | 990 | Member At Large | 2 | $0 | $0 | View return |
| 2015 | Advanced Technology International | 990 | Director | 36 | $0 | $179,559 | View return |
| 2015 | Rose Country Dental Inc | 990 | Vice Chair | 0.25 | $0 | $0 | View return |
| 2015 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2015 | Pest Control Operators of California Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Tolland County Agricultural Center Inc. | 990 | Treasurer | 20 | $0 | $0 | View return |
| 2015 | Kavana | 990 | Member At Large | 2 | $0 | $0 | View return |
| 2014 | Advanced Technology International | 990 | Director | 36 | $0 | $175,339 | View return |
| 2014 | Pest Control Operators of California Inc | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2014 | Rose Country Dental Inc | 990 | Vice Chair | 0.25 | $0 | $0 | View return |
| 2014 | Woodberry Forest School | 990 | Trustee | 2 | $0 | $0 | View return |
| 2013 | Advanced Technology International | 990 | Director | 34 | $0 | $169,092 | View return |
| 2013 | Rose Country Dental Inc | 990 | Vice Chair | 1 | $0 | $0 | View return |
| 2013 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2013 | Woodberry Forest School | 990 | Trustee | 2 | $0 | $0 | View return |
| 2012 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2011 | The Mayer Foundation | 990PF | President | 5 | $0 | $0 | View return |
| 2010 | The Mayer Foundation | 990PF | President | 1 | $0 | $0 | View return |