| Company | Timeline | Status | |
| Mark Costello Costume Ltd Director • Unreported | 25 Nov 2020←4 Years→Current | Active | |
| Mark Costello Consultancy Ltd Director • Unreported | 25 Nov 2020←4 Years→Current | Active | |
| Unlimited Manufacturing Ltd Director • Company Director | 1 May 2020←1 Year 10 Months→18 Mar 2022 | Active | |
