| 2024 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 2 | $0 | $0 | View return |
| 2023 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2022 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 3 | $0 | $0 | View return |
| 2022 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2022 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2022 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2021 | The Partnership for New York City Inc | 990 | Director, Through 7/15/21 | 0.1 | $0 | $0 | View return |
| 2021 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2021 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 3 | $0 | $0 | View return |
| 2021 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2020 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2020 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 10 | $0 | $0 | View return |
| 2020 | The Partnership for New York City Inc | 990 | Director | 0.1 | $0 | $0 | View return |
| 2020 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2019 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 3 | $0 | $0 | View return |
| 2019 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2019 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2018 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 3 | $0 | $0 | View return |
| 2018 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2018 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2017 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 10 | $0 | $0 | View return |
| 2017 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 8 | $0 | $0 | View return |
| 2017 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2016 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 3 | $0 | $0 | View return |
| 2016 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2016 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | $0 | View return |
| 2015 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2015 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 4 | $0 | $0 | View return |
| 2015 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | - | View return |
| 2014 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 1 | $0 | $0 | View return |
| 2014 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | $0 | $0 | View return |
| 2014 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 0 | $0 | - | View return |
| 2013 | Memorial Sloan-Kettering Cancer Center | 990 | See Schedule O | 1 | $0 | $0 | View return |
| 2013 | Memorial Sloan-Kettering Cancer Center | 990 | Board Member | 1 | - | - | View return |
| 2010 | Jonathan Grayer Charitable Trust C/O Barry Horowitz Withumsmithbrown | 990PF | Founder Trustee | 5 | $0 | $0 | View return |