| 2024 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2024 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2024 | National Parks Conservation Association | 990 | First Vice Chair | 1 | $0 | $0 | View return |
| 2023 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2023 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2023 | The Exploratorium | 990 | Director | 2 | $0 | $0 | View return |
| 2023 | Earthjustice | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | National Parks Conservation Association | 990 | Secretary | 1 | $0 | $0 | View return |
| 2022 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2022 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2022 | National Parks Conservation Association | 990 | Secretary | 1 | $0 | $0 | View return |
| 2022 | The Exploratorium | 990 | Vice-Chair | 2 | $0 | $0 | View return |
| 2022 | Earthjustice | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2021 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2021 | The Exploratorium | 990 | Chair | 2 | $0 | $0 | View return |
| 2021 | National Parks Conservation Association | 990 | Secretary | 1 | $0 | $0 | View return |
| 2020 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2020 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2020 | The Exploratorium | 990 | Chair | 2 | $0 | $0 | View return |
| 2020 | National Parks Conservation Association | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2019 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2019 | The Exploratorium | 990 | Chair | 2 | $0 | $0 | View return |
| 2019 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2018 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2018 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2018 | The Exploratorium | 990 | Chair | 2 | $0 | $0 | View return |
| 2017 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2017 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2017 | The Exploratorium | 990 | Vice-Chair | 2 | $0 | $0 | View return |
| 2017 | East Palo Alto Academy Foundation | 990 | Director | 0.5 | $0 | $0 | View return |
| 2017 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2017 | The Exploratorium | 990 | Vice-Chair | 2 | $0 | $0 | View return |
| 2017 | East Palo Alto Academy Foundation | 990 | Director | 0.5 | $0 | $0 | View return |
| 2016 | East Palo Alto Academy Foundation | 990 | Director | 0.5 | $0 | $230,548 | View return |
| 2016 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2016 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2016 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2016 | The Exploratorium | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | Norfolk County Teachers Association Inc | 990 | 2nd Vice President | 2 | $1,500 | $0 | View return |
| 2015 | East Palo Alto Academy Foundation | 990 | Director | 0.5 | $0 | $149,218 | View return |
| 2015 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2015 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2015 | The Exploratorium | 990 | Director | 2 | $0 | $0 | View return |
| 2015 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2014 | Norfolk County Teachers Association Inc | 990 | 2nd Vice President | 2 | $1,500 | $0 | View return |
| 2014 | East Palo Alto Academy Foundation | 990 | Director | 0.5 | $0 | $163,833 | View return |
| 2014 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2014 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2014 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2014 | The Exploratorium | 990 | Director | 2 | $0 | $0 | View return |
| 2013 | Norfolk County Teachers Association Inc | 990 | 2nd Vice President | 2 | $1,500 | $0 | View return |
| 2013 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2013 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2013 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2013 | National Parks Conservation Association | 990 | Treasurer | 1 | $0 | $0 | View return |
| 2012 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2012 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2011 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2011 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |
| 2010 | The Charles and Roberta Katz Family Foundation | 990PF | First Vice President | 0 | $0 | $0 | View return |
| 2010 | The Charles and Roberta Katz Family Foundation | 990PF | Secretary/Treasurer | 0 | $0 | $0 | View return |