| 2023 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2023 | Amboseli Trust for Elephants | 990 | Trustee | - | $0 | $0 | View return |
| 2023 | Lower Merion Conservancy | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2022 | Amboseli Trust for Elephants | 990 | Trustee | - | $0 | $0 | View return |
| 2022 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2022 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2021 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2021 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2021 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2020 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2020 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2019 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2019 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2019 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2018 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2018 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2017 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2017 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2016 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2016 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2016 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Biosphere Foundation Formerly-Planetary Coral Reef Foundation | 990 | Director | 0 | $0 | $0 | View return |
| 2015 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2015 | African Elephant Conservation Trust | 990 | Trustee | 5 | $0 | $0 | View return |
| 2015 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Wildlifedirect Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Biosphere Foundation Formerly-Planetary Coral Reef Foundation | 990 | Board Member | 0 | $0 | $0 | View return |
| 2014 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2014 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | Biosphere Foundation Formerly-Planetary Coral Reef Foundation | 990 | Board Member | 0 | $0 | $0 | View return |
| 2013 | Amboseli Trust for Elephants | 990 | Trustee | 5 | $0 | $0 | View return |
| 2013 | American Federation of Labor & Congress of Industrial Orgs - Ak | 990 | Secretary/Treasurer | 1 | $0 | $0 | View return |
| 2013 | Ancient Egypt Research Asssociates Inc. | 990 | Director | 1 | $0 | $0 | View return |