| Nom | Prénom | Mandat | Power |
|---|---|---|---|
| SCP DE COMMISSAIRES AUX COMPTES ANDRE & ASSOCIES | |||
| SOCIETE FAMILIALE GUILLAUME | |||
| HOLDING HXG | |||
| GUILLAUME | PIERRE | 1956-05 | |
| GUILLAUME | MARTINE | 1959-04 | Chief Executive Officer |
| GUILLAUME | MARTINE | 1959-04 | Chief Executive Officer |
| GUILLAUME | HENRI | 1966-06 |