| 2024 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2023 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2023 | Rosedale Office Building Inc | 990 | Trustee - Chairman End 5/31/24 | 2 | $0 | $0 | View return |
| 2023 | Child Study Center | 990 | Trustee - Vice Chair End 5/31/24 | 2 | $0 | $0 | View return |
| 2023 | W I Cook Foundation Inc. | 990 | Trustee End 5/31/24 | 1 | $0 | $0 | View return |
| 2023 | Cook Children'S Health Plan | 990 | Trustee End 5/31/24 | 1 | $0 | $0 | View return |
| 2023 | Cook Children'S Health Care System | 990 | Trustee End 5/31/24 | 1 | $0 | $0 | View return |
| 2022 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2021 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2020 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2020 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | W I Cook Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Rosedale Office Building Inc | 990 | Trustee - Chairman | 2 | $0 | $0 | View return |
| 2020 | Child Study Center | 990 | Trustee - Vice Chair | 2 | $0 | $0 | View return |
| 2020 | Cook Children'S Health Care System | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2019 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Rosedale Office Building Inc | 990 | Trustee - Chairman | 2 | $0 | $0 | View return |
| 2019 | Cook Children'S Health Care System | 990 | Trustee - Chairman | 1 | $0 | $0 | View return |
| 2019 | W I Cook Foundation Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Child Study Center | 990 | Trustee - Chairman | 2 | $0 | $0 | View return |
| 2018 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2018 | Rosedale Office Building Inc | 990 | Trustee - Chariman | 2 | $0 | $0 | View return |
| 2018 | W I Cook Foundation Inc. | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2018 | Child Study Center | 990 | Vice Chair | 2 | $0 | $0 | View return |
| 2018 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Cook Children'S Health Care System | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2017 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2017 | Cook Children'S Health Care System | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2017 | Rosedale Office Building Inc | 990 | Trustee - Chairman | 2 | $0 | $0 | View return |
| 2017 | W I Cook Foundation Inc. | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2017 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | The Jeff D Conatser Foundation | 990PF | President | 1 | $0 | - | View return |
| 2016 | Cook Children'S Health Care System | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2016 | W I Cook Foundation Inc. | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2016 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |
| 2015 | Cook Children'S Medical Center | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | W I Cook Foundation Inc. | 990 | Trustee-Vice Chairman | 2 | $0 | $0 | View return |
| 2015 | Cook Children'S Health Care System | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |
| 2014 | Cook Children'S Medical Center | 990 | Trustee-Chairman | 2 | $0 | $0 | View return |
| 2014 | Cook Children'S Health Care System | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Cook Children'S Health Plan | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |
| 2013 | Cook Children'S Health Plan | 990 | Trustee | 1 | - | - | View return |
| 2013 | Cook Children'S Medical Center | 990 | Trustee-Secretary/Treasurer | 2 | - | - | View return |
| 2012 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |
| 2011 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |
| 2010 | The Jeff D Conatser Foundation | 990PF | President | 0 | $0 | - | View return |