| 2024 | National Football Museum Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2024 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2024 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2023 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2023 | National Football Museum Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2023 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2023 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2022 | National Football Museum Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2022 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2022 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2022 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2021 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2021 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2021 | National Football Museum Inc. | 990 | Trustee | 1 | $0 | $0 | View return |
| 2021 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2020 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2020 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2019 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2019 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2019 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2018 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2018 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2018 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2017 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2017 | National Football Museum Inc. | 990 | Trustee | 2 | $0 | $0 | View return |
| 2017 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2017 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2016 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2016 | National Football Museum Inc. | 990 | Trustee | 2 | $0 | $0 | View return |
| 2016 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2016 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2015 | National Football Museum Inc. | 990 | Trustee | 2 | $0 | $0 | View return |
| 2015 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2015 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2015 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2014 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | - | - | View return |
| 2014 | National Football Museum Inc. | 990 | Trustee | 2 | $0 | $0 | View return |
| 2014 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2014 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2013 | National Football Museum Inc. | 990 | Trustee | 2 | $0 | $0 | View return |
| 2013 | Henry and Louise Timken Foundation | 990 | Secretary | 1 | $0 | $0 | View return |
| 2013 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2013 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2012 | W R Timken Jr Foundation | 990PF | Pres/Trustee | 1 | $0 | - | View return |
| 2012 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2011 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2011 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |
| 2010 | Timken Foundation of Canton | 990PF | Trustee | 1 | $0 | $0 | View return |