| Company | Timeline | Status | |
| Saltirecontracts Limited Director • Coach Builder | 28 May 2025←5 Months→Current | Active | |
| Walker Installations Ltd Director • Company Director | 7 Aug 2023←1 Year 5 Months→14 Jan 2025 | Dissolved | |
| DW Contracts Livingston Ltd Director • Coach Builder | 9 Oct 2020←3 Years→21 Nov 2023 | Dissolved | |
| Walker Dispensers Ltd Director • Director | 7 Aug 2018←7 Years→Current | Active | |
| Walker Contracts (Livingston) Limited Director • Contractor | 2 Jul 2015←5 Years→27 Oct 2020 | Dissolved | |
