| 2025 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2024 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2024 | Eric and Sueann Siegel Family Foundation Inc | 990PF | President/Tr | 0.5 | $0 | $0 | View return |
| 2024 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2023 | Arlington Heights Historical Society | 990EZ | Director | 1 | $0 | $0 | View return |
| 2023 | California Jazz Conservatory Inc. | 990 | Treasurer (Thru 3/21/23) | 0.3 | $0 | $0 | View return |
| 2023 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2023 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2023 | Friends of the Los Angeles Free Clinic | 990 | Board Member | 1 | $0 | $0 | View return |
| 2023 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2022 | Btc Squared Inc. | 990EZ | Chairman Of The Board | 0 | $0 | $0 | View return |
| 2022 | Eric and Sueann Siegel Family Foundation Inc | 990PF | President/Treasurer | 0 | $0 | $0 | View return |
| 2022 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2022 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2022 | California Jazz Conservatory Inc. | 990 | Treasurer/Fin. Committee | 0.3 | $0 | $0 | View return |
| 2022 | 505 Sports Ventures Foundation Inc | 990 | Treasurer | 15 | $0 | $0 | View return |
| 2022 | Friends of the Los Angeles Free Clinic | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2021 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2021 | California Jazz Conservatory Inc. | 990 | Treasurer/Finance Committee | 0.3 | $0 | $0 | View return |
| 2021 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President | 0 | $0 | $0 | View return |
| 2021 | Eric and Sueann Siegel Family Foundation Inc | 990PF | President/Treasurer/Director | 0 | $0 | - | View return |
| 2021 | Btc Squared Inc. | 990EZ | Chairman Of The Board | 0 | $0 | $0 | View return |
| 2021 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2021 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2021 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2020 | California Jazz Conservatory Inc. | 990 | Director | 0.3 | $0 | $0 | View return |
| 2020 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2020 | Reprise 20 Inc | 990 | Director | - | $0 | $0 | View return |
| 2020 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2020 | Btc Squared Inc. | 990EZ | Vice Chairman Of The Board | 0 | $0 | $0 | View return |
| 2020 | Eric and Sueann Siegel Family Foundation Inc | 990PF | President/Treasurer/Direct | 0 | $0 | $0 | View return |
| 2020 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2020 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2020 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2020 | Arts and Humanities Council of Montgomery County In | 990 | Director | 3.5 | $0 | $0 | View return |
| 2019 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2019 | Reprise 20 Inc | 990 | Director | - | $0 | $0 | View return |
| 2019 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2019 | Btc Squared Inc. | 990EZ | Vice Chairman Of The Board | 0 | $0 | $0 | View return |
| 2019 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2019 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2019 | Arts and Humanities Council of Montgomery County In | 990 | Director | 3.5 | $0 | $0 | View return |
| 2018 | Homeland Racquet Club Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2018 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2018 | Woodstock High School Baseball Dugout Club Inc. | 990EZ | President | 1 | $0 | - | View return |
| 2018 | The Beelzebubs Alumni Association Inc | 990 | Director | 5 | $0 | $0 | View return |
| 2018 | Philadelphia Bar Association | 990 | Board Member | 3 | $0 | $0 | View return |
| 2018 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2018 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Arts and Humanities Council of Montgomery County In | 990 | Chair | 3.5 | $0 | $0 | View return |
| 2018 | Reprise 20 Inc | 990 | Director | 8 | $0 | $0 | View return |
| 2018 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2017 | Homeland Racquet Club Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2017 | Reprise 20 Inc | 990 | Director | 8 | $0 | $0 | View return |
| 2017 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2017 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2017 | Anacostia Waterfront Trust | 990 | Board Member | 1 | $0 | $0 | View return |
| 2017 | Arts and Humanities Council of Montgomery County In | 990 | Chair | 3.5 | $0 | $0 | View return |
| 2017 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2017 | Capitol Riverfront Business Improvement District | 990 | Voting Board Member | 1 | $0 | $0 | View return |
| 2017 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2016 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2016 | Homeland Racquet Club Inc | 990 | Treasurer | - | $0 | $0 | View return |
| 2016 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2016 | Cec Stuyvesant Cove Inc. | 990 | Acting Chair Thru Oct. 2016 | 2 | $0 | $0 | View return |
| 2016 | Anacostia Waterfront Trust | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Arts and Humanities Council of Montgomery County In | 990 | Chair | 3.5 | $0 | $0 | View return |
| 2016 | Capitol Riverfront Business Improvement District | 990 | Chairman | 1 | $0 | $0 | View return |
| 2016 | Familylinks Inc. | 990 | Board Member | 2.5 | $0 | $0 | View return |
| 2016 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2015 | Homeland Racquet Club Inc | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2015 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2015 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2015 | Cec Stuyvesant Cove Inc. | 990 | Acting Chair | 2 | $0 | $0 | View return |
| 2015 | Arts and Humanities Council of Montgomery County In | 990 | Chair | 5 | $0 | $0 | View return |
| 2015 | Capitol Riverfront Business Improvement District | 990 | President | 1 | $0 | $0 | View return |
| 2015 | Friends of the Los Angeles Free Clinic | 990 | Treasurer | 2 | $0 | $0 | View return |
| 2014 | New York Hall of Science | 990 | Director & Chief Content Officer | 35 | $180,349 | $0 | View return |
| 2014 | William J and Sally R Siegel Foundation Ltd. | 990PF | Vice President/Treasurer | 0 | $0 | $0 | View return |
| 2014 | Cec Stuyvesant Cove Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Homeland Racquet Club Inc | 990 | Treasurer | - | $0 | $0 | View return |
| 2014 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2014 | Arts and Humanities Council of Montgomery County In | 990 | Chair | 2 | $0 | $0 | View return |
| 2014 | Friends of the Los Angeles Free Clinic | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Capitol Riverfront Business Improvement District | 990 | President | 1 | $0 | $0 | View return |
| 2013 | New York Hall of Science | 990 | Director & Chief Content O | 35 | $161,028 | $0 | View return |
| 2013 | Cec Stuyvesant Cove Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2013 | Growingsoul Inc. | 990EZ | Treasurer | 1 | $0 | - | View return |
| 2013 | William J and Sally R Siegel Foundation Ltd. | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2013 | Overfoot Inc. | 990EZ | Director | 1 | $0 | $0 | View return |
| 2013 | Reprise Theater Company | 990 | Director | - | $0 | $0 | View return |
| 2013 | Friends of the Los Angeles Free Clinic | 990 | Board Director | 1 | $0 | $0 | View return |
| 2013 | Capitol Riverfront Business Improvement District | 990 | Chair | 1 | $0 | $0 | View return |
| 2013 | Friends of Ivanhoe School | 990 | Co-Vice-Pres. | 0 | $0 | $0 | View return |
| 2013 | Cec Stuyvesant Cove Inc. | 990 | Board Member | 1 | $0 | $0 | View return |
| 2012 | William J and Sally R Siegel Foundation Ltd. | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2011 | William J and Sally R Siegel Foundation Ltd. | 990PF | Treasurer | 0 | $0 | $0 | View return |