| Company | Timeline | Status | |
| Mark P Calvert Ltd Director • Director | 1 Dec 2023←1 Year 10 Months→Current | Active | |
| Calvert & Green Ltd Director • Director | 15 May 2019←6 Years→29 Jul 2025 | Dissolved | |
| Mosaic Led Ltd Director • Director | 23 Jan 2019←4 Years→21 Nov 2023 | Dissolved | |
| Hive Media Control Ltd Director • Director | 3 May 2017←8 Years→Current | Active | |
| Realtime Environment Systems Ltd Director • Director | 9 Jun 2014←11 Years→Current | Active | |
| Immersive London Limited Director • Director | 30 Sep 2013←8 Years→2 Mar 2022 | Dissolved | |
| Immersive Limited Director • Director | 1 Aug 2011←2 Years 11 Months→16 Jul 2014 | Active | |
