| Company | Timeline | Status | |
| Roberts Brothers Toilet Hire Ltd Director • Slate Cutter | 23 Apr 2024←1 Year 6 Months→Current | Active | |
| Robert Brothers Transport Limited Director • Slate Cutter | 17 Feb 2021←4 Years→Current | Active | |
| Felin Fawr Slate Ltd Director • Slate Cutter | 8 Jun 2020←5 Years→Current | Active | |
| Felin Fawr Cyf Director • Slate Manager | 21 Feb 2012←13 Years→Current | Active | |
| Penrhyn Quarries Limited Director • Slate Processing | 14 Sep 2010←13 Years→20 Feb 2024 | Dissolved | |
