| Current (2) |
| Chairman | 2021 |
| Deputy Chairman | 2025 |
| Former (32) |
| Deputy Chairman | 2010 – 2015 |
| Board of Directors | 2004 – 2010 |
| Board of Directors | 1916 – 1992 |
| Deputy Chairman | 2009 – 2010 |
| Board of Directors | 1916 – 2009 |
| Chairman | 1916 – 1998 |
| Deputy Chairman | 2018 – 2020 |
| Board of Directors | 1916 – 1998 |
| Deputy Chairman | 2002 – 2009 |
| Chairman | 2010 – 2021 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 1916 – 1994 |
| Board of Directors | 2002 – 2009 |
| Chairman | 2004 – 2009 |
| Chairman | 2009 – 2010 |
| Board of Directors | 1916 – 1990 |
| Board of Directors | 2004 – 2010 |
| Board of Directors | 2004 – 2009 |
| Board of Directors | 1916 – 2001 |
| Chairman | 1998 – 2004 |
| Deputy Chairman | 2021 – 2025 |
| Board of Directors | 2001 – 2002 |
| Board of Directors | 2004 – 2009 |
| Board of Directors | 2005 – 2005 |
| Board of Directors | 2009 – 2010 |
| Board of Directors | 1998 – 2002 |
| Board of Directors | 1916 – 2003 |
| Board of Directors | 1998 – 2011 |
| Board of Directors | 2003 – 2009 |
| Board of Directors | 1998 – 1998 |
| Board of Directors | 1916 – 1988 |
| Board of Directors | 2004 – 2004 |