| Current (3) |
| Deputy Chairman | 2026 |
| Board of Directors | 2020 |
| Chairman | 2025 |
| Former (16) |
| Chairman | 2004 – 2009 |
| Board of Directors | 2001 – 2014 |
| Chairman | 1928 – 2004 |
| Chairman | 1928 – 2000 |
| Board of Directors | 2020 – 2026 |
| Board of Directors | 1928 – 1990 |
| Board of Directors | 2014 – 2017 |
| Board of Directors | 2006 – 2011 |
| Chairman | 2009 – 2014 |
| Chairman | 2014 – 2017 |
| Board of Directors | 2005 – 2009 |
| Board of Directors | 2000 – 2012 |
| Board of Directors | 2017 – 2018 |
| Board of Directors | 2017 – 2026 |
| Board of Directors | 1928 – 2000 |
| Board of Directors | 2009 – 2014 |