| 2025 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $47,694 | View return |
| 2025 | Macon County Public Safety Training Foundation | 990PF | President | 3 | $0 | - | View return |
| 2025 | Sequoia Farm Foundation | 990PF | President | 2 | $0 | - | View return |
| 2025 | Charity Fund - the Ukraine Foundation | 990PF | Chairman | 5 | $0 | - | View return |
| 2025 | Icat Training Foundation | 990PF | President | 20 | $0 | - | View return |
| 2025 | Center to Combat Human Trafficking | 990PF | President | 1 | $0 | - | View return |
| 2025 | The Nature Conservation Trust | 990PF | Trustee | 1 | $0 | - | View return |
| 2025 | Farmers Youth Education Foundation | 990PF | President | 1 | $0 | - | View return |
| 2025 | Fundacion Para La Paz Y La Seguridad | 990PF | President | 1 | $0 | - | View return |
| 2025 | Friends of the Ukraine Foundation | 990PF | President | 1 | $0 | - | View return |
| 2024 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $49,882 | View return |
| 2024 | Macon County Public Safety Training Foundation | 990PF | President | 3 | $0 | - | View return |
| 2024 | Sequoia Farm Foundation | 990PF | President | 2 | $0 | - | View return |
| 2024 | Farmers Youth Education Foundation | 990PF | President | 1 | $0 | - | View return |
| 2024 | The Nature Conservation Trust | 990PF | Trustee | 1 | $0 | - | View return |
| 2024 | Center to Combat Human Trafficking | 990PF | President | 1 | $0 | - | View return |
| 2024 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 1 | $0 | - | View return |
| 2024 | Charity Fund - the Ukraine Foundation | 990PF | Chairman | 5 | $0 | - | View return |
| 2023 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $32,929 | View return |
| 2023 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 1 | $0 | - | View return |
| 2023 | Center to Combat Human Trafficking | 990PF | President | 0.5 | $0 | - | View return |
| 2023 | Charity Fund - the Ukraine Foundation | 990PF | Chairman | 5 | $0 | - | View return |
| 2023 | Farmers Youth Education Foundation | 990PF | President | 1 | $0 | - | View return |
| 2023 | Sequoia Farm Foundation | 990PF | President | 2 | $0 | - | View return |
| 2023 | Macon County Public Safety Training Foundation | 990PF | Chairman | 3 | $0 | - | View return |
| 2023 | The Nature Conservation Trust | 990PF | Trustee | 1 | $0 | - | View return |
| 2022 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $15,219 | View return |
| 2022 | Sequoia Farm Foundation | 990PF | President | 2 | $0 | - | View return |
| 2022 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 1 | $0 | - | View return |
| 2022 | Macon County Public Safety Training Foundation | 990PF | Director | 0.5 | $0 | - | View return |
| 2022 | The Nature Conservation Trust | 990PF | Trustee | 1 | $0 | - | View return |
| 2022 | Center to Combat Human Trafficking | 990PF | President | 0.5 | $0 | - | View return |
| 2022 | Charity Fund - the Ukraine Foundation | 990PF | Chairman | 0 | $0 | - | View return |
| 2022 | Buffett Family Foundation | 990EZ | Trustee | 0 | $0 | $0 | View return |
| 2022 | Public Safety Properties Foundation | 990PF | President | 1 | $0 | - | View return |
| 2022 | Farmers Youth Education Foundation | 990PF | President | 1 | $0 | - | View return |
| 2021 | Sequoia Farm Foundation | 990PF | President | 5 | $44,119 | - | View return |
| 2021 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $22,416 | $13,363 | View return |
| 2021 | The Nature Conservation Trust | 990PF | Trustee | 3 | $0 | - | View return |
| 2021 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 1 | $0 | - | View return |
| 2021 | Central IL Regional Forensics Foundation | 990PF | Director | 0 | $0 | - | View return |
| 2021 | Center to Combat Human Trafficking | 990PF | President | 1 | $0 | - | View return |
| 2021 | Public Safety Properties Foundation | 990PF | Director | 1 | $0 | - | View return |
| 2020 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 1 | $400,000 | - | View return |
| 2020 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $12,330 | View return |
| 2020 | Learning by Giving Foundation Inc | 990PF | Director | 1 | $0 | $0 | View return |
| 2020 | Central IL Regional Forensics Foundation | 990PF | Director | 0 | $0 | - | View return |
| 2020 | Center to Combat Human Trafficking | 990PF | Director | 1 | $0 | - | View return |
| 2020 | Sequoia Farm Foundation | 990PF | President | 5 | $0 | - | View return |
| 2020 | Public Safety Properties Foundation | 990PF | Director | 1 | $0 | - | View return |
| 2020 | The Nature Conservation Trust | 990PF | Trustee | 3 | $0 | - | View return |
| 2019 | Med Center Development Corporation | 990 | Director | 0.5 | $0 | $14,000 | View return |
| 2019 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 30 | $0 | $11,859 | View return |
| 2019 | Public Safety Properties Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2019 | Center to Combat Human Trafficking | 990PF | Director | 2 | $0 | - | View return |
| 2019 | Fundacion Para La Paz Y La Seguridad | 990PF | Director | 2 | $0 | - | View return |
| 2019 | Sequoia Farm Foundation | 990PF | President | 5 | $0 | - | View return |
| 2019 | Sequoia Farm Foundation | 990PF | Director | 1 | $0 | - | View return |
| 2019 | Learning by Giving Foundation Inc | 990PF | Director | 1 | $0 | $0 | View return |
| 2018 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 30 | $0 | $16,561 | View return |
| 2018 | Med Center Development Corporation | 990 | Director | 0.5 | $0 | $14,000 | View return |
| 2018 | Learning by Giving Foundation Inc | 990PF | Director | 1 | $0 | - | View return |
| 2018 | Sequoia Farm Foundation | 990PF | President | 5 | $0 | - | View return |
| 2018 | Sequoia Farm Foundation | 990PF | Secretary | 1 | $0 | - | View return |
| 2018 | Public Safety Properties Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2017 | Sequoia Farm Foundation | 990PF | President | 15 | $124,418 | - | View return |
| 2017 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $9,955 | View return |
| 2017 | Sequoia Farm Foundation | 990PF | Secretary | 5 | $0 | - | View return |
| 2017 | Howard G Buffett Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2017 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2016 | Sequoia Farm Foundation | 990PF | President | 15 | $175,000 | - | View return |
| 2016 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $14,402 | View return |
| 2016 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2016 | Sequoia Farm Foundation | 990PF | Secretary | 5 | $0 | - | View return |
| 2016 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2016 | Howard G Buffett Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2016 | Commission on Presidential Debates | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | Sequoia Farm Foundation | 990PF | President | 15 | $150,000 | - | View return |
| 2015 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $11,854 | View return |
| 2015 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2015 | Sequoia Farm Foundation | 990PF | Secretary | 5 | $0 | - | View return |
| 2015 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2015 | Commission on Presidential Debates | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | One Action | 990 | Board Member (Through 09/15) | 0.5 | $0 | $0 | View return |
| 2015 | Opensky Policy Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2015 | The One Campaign | 990 | Board Member (Through 09/15) | 1.5 | $0 | $0 | View return |
| 2015 | Howard G Buffett Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2014 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $11,631 | View return |
| 2014 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2014 | Sequoia Farm Foundation | 990PF | President | 5 | $0 | - | View return |
| 2014 | Sequoia Farm Foundation | 990PF | Secretary | 5 | $0 | - | View return |
| 2014 | One Action | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2014 | Opensky Policy Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2014 | Howard G Buffett Foundation | 990PF | Director | 2 | $0 | - | View return |
| 2014 | Barefoot Foundation Co Adval Consulting LLC | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2014 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2014 | The One Campaign | 990 | Board Member | 1.5 | $0 | $0 | View return |
| 2014 | National 4-H Council | 990 | Board - Public Class | 0.5 | $0 | $0 | View return |
| 2013 | Howard G Buffett Foundation | 990PF | Ex Director/Director | 40 | $73,107 | $4,665 | View return |
| 2013 | Howard G Buffett Foundation | 990PF | Chairman & CEO | 40 | $0 | $9,828 | View return |
| 2013 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2013 | One Action | 990 | Board Member | 0.5 | $0 | $0 | View return |
| 2013 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2013 | Barefoot Foundation Co Adval Consulting LLC | 990EZ | Board Member | 1 | $0 | $0 | View return |
| 2013 | Sequoia Farm Foundation | 990PF | President | 5 | $0 | - | View return |
| 2013 | Sequoia Farm Foundation | 990PF | Secretary | 5 | $0 | - | View return |
| 2013 | Opensky Policy Institute | 990 | Director | 1 | $0 | $0 | View return |
| 2013 | The One Campaign | 990 | Board Member | 1.5 | $0 | $0 | View return |
| 2013 | National 4-H Council | 990 | Board - Public Class | 0.5 | $0 | $0 | View return |
| 2012 | Howard G Buffett Foundation | 990PF | Pres, Director | 40 | $0 | $10,577 | View return |
| 2012 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2012 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2011 | Howard G Buffett Foundation | 990PF | Pres, Director | 40 | $0 | $14,621 | View return |
| 2011 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |
| 2011 | Learning by Giving Foundation Inc | 990PF | Director | 0 | $0 | $0 | View return |
| 2010 | Howard G Buffett Foundation | 990PF | Pres, Direct | 40 | $0 | $12,774 | View return |
| 2010 | The Sherwood Foundation | 990PF | Member | 2 | $0 | $0 | View return |