| Current (4) |
| Board of Directors | 2020 |
| Board of Directors | 2023 |
| Chairman | 2025 |
| Board of Directors | 2020 |
| Former (23) |
| Board of Directors | 1913 – 2000 |
| Board of Directors | 1996 – 1998 |
| Board of Directors | 2010 – 2015 |
| Board of Directors | 2015 – 2018 |
| Board of Directors | 1913 – 1992 |
| Board of Directors | 2021 – 2023 |
| Chairman | 2001 – 2002 |
| Chairman | 2015 – 2019 |
| Chairman | 2020 – 2025 |
| Board of Directors | 1913 – 2001 |
| Chairman | 2003 – 2004 |
| Board of Directors | 1913 – 1999 |
| Chairman | 2006 – 2011 |
| Board of Directors | 2020 – 2021 |
| Chairman | 2002 – 2003 |
| Chairman | 1996 – 2001 |
| Chairman | 1913 – 1994 |
| Chairman | 2011 – 2015 |
| Board of Directors | 1913 – 1992 |
| Board of Directors | 2018 – 2019 |
| Chairman | 1913 – 1996 |
| Chairman | 2004 – 2006 |
| Board of Directors | 2006 – 2010 |