| 2024 | Elkhorn Marine Conservancy Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2024 | The Knobloch Family Foundation | 990PF | Dir, VP | 1 | $0 | $0 | View return |
| 2024 | Ejk Foundation | 990PF | Treas, Trustee | 1 | $0 | $0 | View return |
| 2024 | The Cullen Foundation | 990PF | Vice Chairman/Director | 2 | $0 | $0 | View return |
| 2023 | Ejk Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2023 | Elkhorn Marine Conservancy Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2023 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The Cullen Foundation | 990PF | Vice Chairman/Director | 2 | $0 | $0 | View return |
| 2022 | Elkhorn Marine Conservancy Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2022 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2022 | Ejk Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2022 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Foundation for Depelchin Children'S Center | 990 | Director | 0.6 | $0 | $0 | View return |
| 2022 | The Cullen Foundation | 990PF | Vice Chairman/Director | 2 | $0 | $0 | View return |
| 2021 | The Cullen Foundation | 990PF | Vice Chair/Director | 2 | $0 | $0 | View return |
| 2021 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Elkhorn Marine Conservancy Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2021 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2021 | Foundation for Depelchin Children'S Center | 990 | Director | 0.6 | $0 | $0 | View return |
| 2021 | Ejk Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | The Knobloch Family Foundation | 990PF | Director | 2 | $0 | $0 | View return |
| 2020 | Foundation for Depelchin Children'S Center | 990 | Director | 0.6 | $0 | $0 | View return |
| 2020 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | The Cullen Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2020 | Ejk Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | Foundation for Depelchin Children'S Center | 990 | Director | 0.6 | $0 | $0 | View return |
| 2019 | Ejk Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | The Cullen Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2019 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2018 | The Knobloch Family Foundation | 990PF | President | 10 | $0 | $0 | View return |
| 2018 | Foundation for Depelchin Children'S Center | 990 | Director | 0.6 | $0 | $0 | View return |
| 2018 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | The Cullen Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2017 | The Cullen Foundation | 990PF | Director From Apr 17 | 2 | $0 | - | View return |
| 2017 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | The Cullen Foundation | 990PF | Director From Apr 17 | 2 | $0 | - | View return |
| 2016 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Texas Business Hall of Fame Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Foundation for Depelchin Children'S Center | 990 | Director | 0.8 | $0 | $0 | View return |
| 2015 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2015 | Texas Business Hall of Fame Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Houston Wilderness Inc. | 990 | Secretary/Treasurer | 2 | $0 | $0 | View return |
| 2014 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2014 | Texas Business Hall of Fame Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Houston Wilderness Inc. | 990 | Secretary/Treasurer | 2 | $0 | $0 | View return |
| 2014 | The Endowment for the Museum of Fine Arts Houston | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2013 | Texas Business Hall of Fame Foundation | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Houston Wilderness Inc. | 990 | Secretary/Treasurer | 2 | $0 | $0 | View return |
| 2012 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2011 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2011 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |
| 2010 | The Knobloch Family Foundation | 990PF | Director | 1 | $0 | $0 | View return |