| 2024 | The Alper Family Foundation Inc. | 990PF | Director, Vice President, Treasurer | 1 | $0 | $0 | View return |
| 2023 | Big Thompson Watershed Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2023 | The Alper Family Foundation Inc. | 990PF | Director, Vice President, Treasurer | 1 | $0 | $0 | View return |
| 2023 | The Colorado Education Initiative | 990 | Board Member | 2 | $0 | $0 | View return |
| 2023 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | The Colorado Education Initiative | 990 | Board Member | 2 | $0 | $0 | View return |
| 2022 | The Alper Family Foundation Inc. | 990PF | Vice President And Treasurer | 1 | $0 | $0 | View return |
| 2022 | Big Thompson Watershed Coalition | 990 | President | 6 | $0 | $0 | View return |
| 2022 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Poudre River Library Trust Inc. | 990 | Prior Vice P | 2 | $0 | $0 | View return |
| 2021 | Big Thompson Watershed Coalition | 990 | President | 6 | $0 | $0 | View return |
| 2021 | The Alper Family Foundation Inc. | 990PF | Vice President And Treasurer | 1 | $0 | $0 | View return |
| 2021 | The Colorado Education Initiative | 990 | Board Member | 2 | $0 | $0 | View return |
| 2021 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2020 | The Colorado Education Initiative | 990 | Board Member | 2 | $0 | $0 | View return |
| 2020 | The Alper Family Foundation Inc. | 990PF | Vice President And Treasurer | 1 | $0 | $0 | View return |
| 2020 | Poudre River Library Trust Inc. | 990 | Vice Preside | 2 | $0 | $0 | View return |
| 2020 | Big Thompson Watershed Coalition | 990 | Secretary | 2 | $0 | $0 | View return |
| 2020 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2019 | Poudre River Library Trust Inc. | 990 | Vice Preside | 2 | $0 | $0 | View return |
| 2019 | The Alper Family Foundation Inc. | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2019 | Big Thompson Watershed Coalition | 990 | Secretary | 2 | $0 | $0 | View return |
| 2019 | The Colorado Education Initiative | 990 | Board Member | 2 | $0 | $0 | View return |
| 2019 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2018 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 0.1 | $0 | $0 | View return |
| 2018 | Poudre River Library Trust Inc. | 990EZ | Vice Preside | 2 | $0 | - | View return |
| 2018 | The Alper Family Foundation Inc. | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2018 | Big Thompson Watershed Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2018 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2017 | Big Thompson Watershed Coalition | 990 | Director | 1 | $0 | $0 | View return |
| 2017 | Poudre River Library Trust Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2017 | The Alper Family Foundation Inc. | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2017 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 0.1 | $0 | $0 | View return |
| 2017 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Poudre River Library Trust Inc. | 990EZ | Director | 1 | $0 | - | View return |
| 2016 | The Alper Family Foundation Inc. | 990PF | Treasurer | 1 | $0 | $0 | View return |
| 2016 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 2 | $0 | $0 | View return |
| 2016 | Convergence Center for Policy Resolution | 990 | Trustee | 1 | $0 | $0 | View return |
| 2016 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2015 | Convergence Center for Policy Resolution | 990 | Trustee | 1.5 | $0 | $0 | View return |
| 2015 | The Alper Family Foundation Inc. | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2015 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 2 | $0 | $0 | View return |
| 2014 | Convergence Center for Policy Resolution | 990 | Trustee | 1.5 | $0 | $0 | View return |
| 2014 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 2 | $0 | $0 | View return |
| 2014 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Lillian & Albert Small Capital Jewish Museum Inc. | 990 | Past President | 2 | $0 | $0 | View return |
| 2013 | Philander Chase Conservancy | 990 | Trustee | 1 | $0 | $0 | View return |
| 2013 | Kenyon College | 990 | Trustee | 1 | $0 | $0 | View return |
| 2011 | The Alper Family Foundation Inc. | 990PF | Treasurer | 0 | $0 | $0 | View return |
| 2010 | The Alper Family Foundation Inc. | 990PF | Treasurer | 0 | $0 | $0 | View return |