| 2024 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0.1 | $0 | $0 | View return |
| 2024 | Deepdale Inc | 990 | Governor | 3 | $0 | $0 | View return |
| 2024 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | Deepdale Inc | 990 | Governor | 3 | $0 | $0 | View return |
| 2023 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0.1 | $0 | $0 | View return |
| 2022 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2022 | Deepdale Inc | 990 | Governor | 3 | $0 | $0 | View return |
| 2022 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Deepdale Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2021 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2020 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2020 | Deepdale Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2020 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | Trustees of Westminster School Inc. | 990 | Outgoing Trustee | 1 | $0 | $0 | View return |
| 2019 | Deepdale Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2019 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2019 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2018 | Deepdale Inc | 990 | Secretary | 3 | $0 | $0 | View return |
| 2018 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2017 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2016 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2015 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Cold Spring Harbor Laboratory | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2014 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Trustees of Trinity College The | 990 | Trustee | 1 | $0 | $0 | View return |
| 2014 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Trustees of Westminster School Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2013 | Cold Spring Harbor Laboratory | 990 | Trustee (From 11/2013) | 1 | - | - | View return |
| 2013 | Barbieri Center Inc | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Trustees of Trinity College The | 990 | Trustee | 1 | - | - | View return |
| 2012 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2011 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |
| 2010 | The Kelter Family Foundation Inc C/O Hume Steyer | 990PF | President, Treasurer | 0 | $0 | $0 | View return |