| 2023 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $1,000 | - | View return |
| 2023 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $1,000 | - | View return |
| 2022 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2022 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2021 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $9,011 | $0 | View return |
| 2021 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2021 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2020 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $7,724 | $0 | View return |
| 2020 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2020 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2019 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2019 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2018 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $19,531 | $0 | View return |
| 2018 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2018 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2017 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $22,773 | $0 | View return |
| 2017 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2017 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2016 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $19,753 | $0 | View return |
| 2016 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2016 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $3,000 | - | View return |
| 2015 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $16,776 | $0 | View return |
| 2015 | Emil Buehler Foundation Inc. | 990PF | Trustee | 1 | $0 | - | View return |
| 2015 | Buehler Aviation Research Fndtn Inc | 990PF | Trustee | 1 | $0 | - | View return |
| 2014 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $17,582 | $0 | View return |
| 2013 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $14,250 | $0 | View return |
| 2011 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $16,200 | $0 | View return |
| 2010 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $14,175 | $0 | View return |
| 2009 | Buehler Challenger & Science Center Foundation Inc. | 990PF | Trustee | 3.5 | $14,700 | $0 | View return |