| Current (4) |
| Chairman | 2026 |
| Board of Directors | 2023 |
| Board of Directors | 2023 |
| Board of Directors | 2024 |
| Former (17) |
| Board of Directors | 1929 – 1990 |
| Chairman | 1999 – 2003 |
| Deputy Chairman | 1996 – 1996 |
| Board of Directors | 2003 – 2013 |
| Board of Directors | 1929 – 1994 |
| Board of Directors | 1929 – 1990 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 1929 – 1992 |
| Chairman | 2020 – 2023 |
| Board of Directors | 2007 – 2024 |
| Board of Directors | 1999 – 2003 |
| Board of Directors | 1994 – 1999 |
| Board of Directors | 2003 – 2007 |
| Chairman | 2003 – 2020 |
| Board of Directors | 2013 – 2016 |
| Board of Directors | 1929 – 1988 |
| Chairman | 2023 – 2026 |