| 2024 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2023 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2023 | The Handler Family Foundation | 990PF | Vice President | 0.1 | $0 | $0 | View return |
| 2022 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2022 | The Handler Family Foundation | 990PF | Vice President | 0.1 | $0 | $0 | View return |
| 2021 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2021 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2020 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2020 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2019 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2019 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2018 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2018 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2017 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2017 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2016 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2016 | The Handler Family Foundation | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2015 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2015 | The Handler Family Foundation | 990PF | Vice President | 1 | $0 | $0 | View return |
| 2014 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2014 | The Handler Family Foundation | 990PF | Vice President | 1 | $0 | $0 | View return |
| 2013 | Wolf Conservation Center Inc. | 990 | President | 2 | $0 | $0 | View return |
| 2013 | The Handler Family Foundation | 990PF | Vice President | 1 | $0 | $0 | View return |
| 2012 | The Handler Family Foundation | 990PF | Vice President | 1 | $0 | $0 | View return |
| 2011 | The Handler Family Foundation | 990PF | Vice President | 1 | $0 | - | View return |