# Mr John Daniel Mason

## Details

- **Born:** 7/1960
- **Nationality:** British
- **Appointments:** 0 (0 active)
- **Control:** 2 holdings



## Control

| Company | Nature of control | Notified | Ceased |
|---|---|---|---|
| [Optimal Process Technology Limited](/company/05401549) | ownership-of-shares-50-to-75-percent | 6 Apr 2016 | 31 May 2026 |
| [Optimal Process Technology Trustee Ltd](/company/17216841) | voting-rights-25-to-50-percent | 13 May 2026 |  |