| Current (2) |
| Chairman | 2026 |
| Board of Directors | 2022 |
| Former (18) |
| Board of Directors | 1924 – 1990 |
| Board of Directors | 1924 – 2002 |
| Chairman | 2000 – 2014 |
| Board of Directors | 1924 – 1992 |
| Chairman | 1994 – 1995 |
| Board of Directors | 1924 – 1990 |
| Board of Directors | 1924 – 1992 |
| Board of Directors | 2017 – 2020 |
| Chairman | 2014 – 2017 |
| Board of Directors | 2002 – 2022 |
| Board of Directors | 2002 – 2011 |
| Chairman | 2017 – 2022 |
| Deputy Chairman | 2001 – 2002 |
| Chairman | 1924 – 2000 |
| Deputy Chairman | 1992 – 1994 |
| Board of Directors | 1924 – 1988 |
| Chairman | 2022 – 2026 |
| Chairman | 1924 – 2001 |