| Current (6) |
| Chairman | 2017 |
| Board of Directors | 2023 |
| Board of Directors | 2019 |
| Board of Directors | 2019 |
| Deputy Chairman | 2019 |
| Board of Directors | 2025 |
| Former (17) |
| Chairman | 1920 – 1999 |
| Board of Directors | 1920 – 2003 |
| Board of Directors | 2014 – 2020 |
| Board of Directors | 2003 – 2012 |
| Chairman | 1920 – 1988 |
| Chairman | 2014 – 2017 |
| Deputy Chairman | 2012 – 2018 |
| Board of Directors | 1920 – 1988 |
| Board of Directors | 2020 – 2025 |
| Board of Directors | 1920 – 1988 |
| Board of Directors | 2012 – 2018 |
| Board of Directors | 1920 – 2012 |
| Chairman | 1999 – 2003 |
| Board of Directors | 1920 – 2012 |
| Board of Directors | 2018 – 2019 |
| Board of Directors | 1920 – 1988 |
| Board of Directors | 1920 – 1999 |