| Company | Timeline | Status | |
| Tarmac Northstone JV Limited Director • Director | 13 Jun 2025←5 Months→Current | Active | |
| Cubis Systems Limited Director • Director | 4 Nov 2022←2 Years 2 Months→14 Jan 2025 | Active | |
| C4 Industries Limited Director • Director | 31 Oct 2020←5 Years→Current | Liquidation | |
| Lone Limited Director • Director | 30 Sep 2020←5 Years→Current | Active | |
| Northstone Concrete Limited Director • Director | 30 Sep 2020←6 Months→30 Mar 2021 | Dissolved | |
| Northstone Products Limited Director • Director | 30 Sep 2020←5 Years→Current | Active | |
| Salmor Industries Ltd Director • Director | 30 Sep 2020←5 Years→Current | Active | |
| John McLean & Sons (Quarries) Limited Director • Director | 30 Sep 2020←11 Months→2 Sep 2021 | Dissolved | |
| Materials Testing Limited Director • Director | 30 Sep 2020←5 Years→Current | Active | |
| T O'Connell & Sons (Contractors) Limited Director • Director | 30 Sep 2020←5 Years→Current | Active | |
