| Company | Timeline | Status | |
Blackwell Masterton International Ltd Director • Contractor | 21 Jun 1992←1 Year 6 Months→31 Dec 1993 | Dissolved | |
| C.A. Blackwell Group Limited Director • Contractor | 21 Jun 1992←1 Year 6 Months→31 Dec 1993 | Active | |
| Premier Lime & Stone Company Limited Director • Contractor | 21 Jun 1992←1 Year 6 Months→31 Dec 1993 | Active | |
| C. A. Blackwell (Contracts) Limited Director • Contractor | 21 Jun 1992←1 Year 6 Months→31 Dec 1993 | Active | |
