EXHIBIT A
The Principals of the Reporting Person are set forth below.
| Name | Principal Occupation and Employment (1) | Citizenship |
| Semiramis Paliou | Director and Chief Executive Officer | Greece |
| Simeon Palios | Director and Chairman | Greece |
| Anastasios Margaronis | Director and President | Greece |
| Ioannis Zafirakis | Director, Co-Chief Financial Officer, Chief Strategy Officer, Treasurer and Secretary | Greece |
| Maria Dede | Co-Chief Financial Officer | Greece |
| Margarita Veniou | Chief Corporate Development, Governance & Communications Officer | Greece |
| Kyriacos Riris | Director | Cyprus |
| Apostolos Kontoyannis | Director | Greece |
| Eleftherios Papatrifon | Director | Greece |
| Simon Frank Peter Morecroft | Director | United Kingdom |
| Jane Sih Ho Chao | Director | China |
(1) The business address of the Principals is Pendelis 16, 175 64 Palaio Faliro, Athens, Greece.