| 2024 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $24,934 | - | View return |
| 2024 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,600 | $0 | View return |
| 2024 | Fred R Muhs Family Foundation | 990PF | President | 2 | $0 | $0 | View return |
| 2023 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $23,727 | - | View return |
| 2023 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,600 | $0 | View return |
| 2023 | Fred R Muhs Family Foundation | 990PF | President | 2 | $0 | $0 | View return |
| 2023 | Society of California Pioneers | 990 | Director | 0.5 | $0 | $0 | View return |
| 2022 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $24,103 | - | View return |
| 2022 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,750 | $0 | View return |
| 2022 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2022 | Society of California Pioneers | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $27,112 | - | View return |
| 2021 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,400 | $0 | View return |
| 2021 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2021 | Society of California Pioneers | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $24,786 | - | View return |
| 2020 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $4,000 | $0 | View return |
| 2020 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2020 | Society of California Pioneers | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $24,232 | - | View return |
| 2019 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,500 | $0 | View return |
| 2019 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2019 | Society of California Pioneers | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 1 | $37,928 | - | View return |
| 2018 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,500 | $0 | View return |
| 2018 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,500 | $0 | View return |
| 2018 | Society of California Pioneers | 990 | Director | 0.06 | $0 | $0 | View return |
| 2018 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2017 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $3,475 | $0 | View return |
| 2017 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2017 | Society of California Pioneers | 990 | Director | 0.06 | $0 | $0 | View return |
| 2016 | Mabelle Mcleod Lewis Memorial Fund | 990PF | Co-Trustee | 4 | $15,845 | - | View return |
| 2016 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $2,500 | $0 | View return |
| 2016 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2016 | Society of California Pioneers | 990 | Director | 0.06 | $0 | $0 | View return |
| 2015 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $805 | $0 | View return |
| 2015 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | $0 | View return |
| 2015 | Society of California Pioneers | 990 | Director | 0.02 | $0 | $0 | View return |
| 2014 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $1,800 | $0 | View return |
| 2014 | Society of California Pioneers | 990 | Director | 0.1 | $0 | $0 | View return |
| 2013 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $1,800 | $0 | View return |
| 2013 | Fred R Muhs Family Foundation | 990PF | Vice President | 2 | $0 | - | View return |
| 2013 | Society of California Pioneers | 990 | Director | 0.3 | $0 | $0 | View return |
| 2012 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $1,800 | $0 | View return |
| 2012 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | - | View return |
| 2011 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $375 | $0 | View return |
| 2011 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | - | View return |
| 2010 | Fred R Muhs Family Foundation | 990PF | VP | 2 | $0 | - | View return |
| 2010 | The Laura Volkerding Charitable Trust | 990PF | Trustee | 1 | $0 | $0 | View return |