| 2025 | Banded Brothers | 990 | Treasurer | - | $0 | $0 | View return |
| 2025 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2025 | Priest Lake Memorial Gardens Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2024 | Banded Brothers | 990 | Treasurer | - | $0 | $0 | View return |
| 2024 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2024 | Priest Lake Memorial Gardens Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2024 | Vine House Inc. | 990EZ | Director | 2 | $0 | $0 | View return |
| 2024 | Greenhouse Services Foundation | 990 | Vice President | 6 | $0 | $0 | View return |
| 2023 | Vine House Inc. | 990EZ | Director | 2 | $0 | $0 | View return |
| 2023 | Banded Brothers | 990 | Treasurer | - | $0 | $0 | View return |
| 2023 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | Priest Lake Memorial Gardens Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2023 | Greenhouse Services Foundation | 990 | Vice President | 6 | $0 | $0 | View return |
| 2022 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2022 | Banded Brothers | 990EZ | Treasurer | 0 | $0 | - | View return |
| 2022 | Vine House Inc. | 990EZ | Director | 2 | $0 | $0 | View return |
| 2022 | Priest Lake Memorial Gardens Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2022 | Greenhouse Services Foundation | 990 | Vice Preside | - | $0 | $0 | View return |
| 2021 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | Priest Lake Memorial Gardens Inc. | 990 | President | 3 | $0 | $0 | View return |
| 2021 | Vine House Inc. | 990EZ | Director | 0 | $0 | $0 | View return |
| 2021 | Greenhouse Services Foundation | 990 | Director | - | $0 | $0 | View return |
| 2020 | T R C Hall of Fame & Associates Inc. | 990 | Past President | 0.5 | $0 | $0 | View return |
| 2020 | Barbara N and Don N Howell Foundation | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | D and M Howell Foundation Charitable Tr 080499 | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | Greenhouse Services Foundation | 990 | Director | - | $0 | $0 | View return |
| 2019 | T R C Hall of Fame & Associates Inc. | 990 | Director | 0.5 | $0 | $0 | View return |
| 2018 | Institute for Building Technology and Safety | 990 | Director | 40 | $143,112 | $0 | View return |
| 2018 | T R C Hall of Fame & Associates Inc. | 990 | Former Board | 1 | $0 | $0 | View return |
| 2017 | Institute for Building Technology and Safety | 990 | Director | 40 | $205,144 | $0 | View return |
| 2017 | T R C Hall of Fame & Associates Inc. | 990 | Former Board President | 1 | $0 | $0 | View return |
| 2016 | Institute for Building Technology and Safety | 990 | Director | 40 | $251,058 | $0 | View return |
| 2016 | T R C Hall of Fame & Associates Inc. | 990 | Former Board President | 1 | $0 | $0 | View return |
| 2016 | Trees for Houston | 990 | Director | 3 | $0 | $0 | View return |
| 2015 | Trees for Houston | 990 | Director | 3 | $0 | $0 | View return |
| 2015 | T R C Hall of Fame & Associates Inc. | 990 | Former Board President | 1 | $0 | $0 | View return |
| 2014 | T R C Hall of Fame & Associates Inc. | 990 | Former Board President | 1 | $0 | $0 | View return |
| 2014 | Trees for Houston | 990 | Director | 3 | $0 | $0 | View return |
| 2013 | The North Stonington Volunteer Fire Company Inc. | 990 | Chief Engine | - | $750 | $0 | View return |
| 2013 | T R C Hall of Fame & Associates Inc. | 990 | Former Board President | 1 | $0 | $0 | View return |
| 2013 | American Society of Heating Refrigerati Ng and Air Conditioning Engineers | 990EZ | Board Governor | 0.5 | $0 | $0 | View return |
