| 2024 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2024 | Ttara Research Foundation | 990EZ | Board Member (Until 2/29/24) | 1 | $0 | $0 | View return |
| 2023 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2023 | Ttara Research Foundation | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2022 | Ttara Research Foundation | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2022 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2022 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Texas Hillel Endowment Foundation | 990 | President | 1 | $0 | $0 | View return |
| 2022 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2021 | Texas Taxpayers and Research Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Ttara Research Foundation | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2021 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2021 | Texas Hillel Endowment Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2021 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2020 | Ttara Research Foundation | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2020 | Texas Taxpayers and Research Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Boys & Girls Club of Central New Mexico | 990 | Past Chair | 2 | $0 | $0 | View return |
| 2020 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2020 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2020 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Texas Hillel Endowment Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2019 | Ttara Research Foundation | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2019 | Boys & Girls Club of Central New Mexico | 990 | Past Chair | 2 | $0 | $0 | View return |
| 2019 | Texas Taxpayers and Research Association | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | The Nathan J Klein Fund | 990PF | Trustee | 0 | $0 | $0 | View return |
| 2019 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2019 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2019 | Texas Hillel Endowment Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2018 | The Nathan J Klein Fund | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2018 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Texas Hillel Endowment Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2018 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2017 | The Nathan J Klein Fund | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2017 | Texas Hillel Endowment Foundation | 990 | Chair | 1 | $0 | $0 | View return |
| 2017 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2016 | Houston Grand Opera Association Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2016 | Texas Hillel Endowment Foundation | 990 | Chair | 0 | $0 | $0 | View return |
| 2015 | Houston Grand Opera Association Inc. | 990 | Chairman Emerit | 1 | $0 | $0 | View return |
| 2015 | Houston Food Bank Endowment Inc. | 990 | Chairman | 2 | $0 | $0 | View return |
| 2015 | Texas Hillel Endowment Foundation | 990 | Chair | 0 | $0 | $0 | View return |
| 2014 | Houston Grand Opera Association Inc. | 990 | Chairman Emerit | 1 | $0 | $0 | View return |
| 2014 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |
| 2014 | Texas Hillel Endowment Foundation | 990 | Chair | 0 | $0 | $0 | View return |
| 2013 | Houston Grand Opera Association Inc. | 990 | Chairman Emerit | 1 | $0 | $0 | View return |
| 2013 | Texas Hillel Endowment Foundation | 990 | Chair | 2 | $0 | $0 | View return |
| 2013 | Houston Food Bank Endowment Inc. | 990 | Chairman | 1 | $0 | $0 | View return |