| 2025 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2025 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2024 | Wadsworth Ditch Company | 990EZ | President | 4 | $6,000 | $0 | View return |
| 2024 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2024 | Prince Georges Heritage Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2024 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2024 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2024 | New York Rugby Club Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Wadsworth Ditch Company | 990EZ | President | 4 | $6,000 | $0 | View return |
| 2023 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Prince Georges Heritage Inc. | 990EZ | Director | 0.25 | $0 | $0 | View return |
| 2023 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2023 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2022 | Wadsworth Ditch Company | 990EZ | President | 4 | $4,800 | $0 | View return |
| 2022 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2022 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2022 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Prince Georges Heritage Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2021 | Wadsworth Ditch Company | 990EZ | President | 4 | $4,800 | $0 | View return |
| 2021 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2021 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2021 | Pi Kappa Alpha Fraternity Gamma Epsilon Chapter | 990EZ | Recruitment | 0 | $0 | - | View return |
| 2021 | Prince Georges Heritage Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2021 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Prince Georges Heritage Inc. | 990EZ | Director | 0.5 | $0 | $0 | View return |
| 2020 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2020 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2019 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2019 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2019 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2018 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2018 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2017 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2016 | Association for Computing Machinery Inc. | 990 | Chief Executive Director | 50 | $449,767 | $0 | View return |
| 2016 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2016 | The Robert Schnabel Charitable Foundation | 990PF | Trustee | 2 | $0 | $0 | View return |
| 2015 | Association for Computing Machinery Inc. | 990 | Chief Executive Director | 50 | $62,189 | $0 | View return |
| 2015 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2014 | Indiana University Research & Technology Corporation | 990 | Member | 1 | $0 | $312,881 | View return |
| 2014 | Mentornet | 990 | Board Member | 2 | $0 | $0 | View return |
| 2014 | The Robert Schnabel Charitable Foundation | 990PF | Chairman | 2 | $0 | $0 | View return |
| 2014 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Mentornet | 990 | Board Member | 2 | $0 | $0 | View return |
| 2013 | Indiana University Research & Technology Corporation | 990 | Member | 1 | $0 | $309,090 | View return |
| 2013 | Code Org | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Central Missouri Volleyball Club | 990EZ | Director | 0 | $0 | - | View return |