| 2025 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2024 | Lost Tree Village Charitable Foundation Inc. | 990 | Vice President | 7 | $0 | $0 | View return |
| 2024 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2023 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2023 | Lost Tree Village Charitable Foundation Inc. | 990 | Vice President | 7 | $0 | $0 | View return |
| 2022 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2022 | Lost Tree Village Charitable Foundation Inc. | 990 | Vice President | 7 | $0 | $0 | View return |
| 2021 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2020 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2019 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2018 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2017 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2016 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2015 | United Performing Arts Fund Inc. | 990 | At-Large Director | 1 | $0 | $0 | View return |
| 2015 | Ziegler Family Foundation Inc C/O Rebecca L Himmelspach | 990PF | President/Secretary/Director | 0 | $0 | $0 | View return |
| 2014 | The Medical College of Wisconsin Inc. | 990 | Trustee | 0.5 | $0 | - | View return |
| 2014 | United Performing Arts Fund Inc. | 990 | At-Large Director | 1 | $0 | $0 | View return |