| Company | Timeline | Status | |
| Tarmac Northstone JV Limited Director • Unreported | 13 Jun 2025←6 Months→31 Dec 2025 | 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 | |
| Northstone Concrete Limited Director • Director | 30 Sep 2020←6 Months→30 Mar 2021 | Dissolved | |
| John McLean & Sons (Quarries) Limited Director • Director | 30 Sep 2020←11 Months→2 Sep 2021 | Dissolved | |
| Hadden Quarries Limited Director • Director | 30 Sep 2020←2 Years 4 Months→7 Feb 2023 | Dissolved | |
| R.J. Maxwell (Ballymena) Limited Director • Director | 30 Sep 2020←5 Years→Current | Liquidation | |
| Aggregates (Ulster) Limited Director • Director | 30 Sep 2020←11 Months→2 Sep 2021 | Dissolved | |
| North Down Brick Limited Director • Director | 30 Sep 2020←11 Months→2 Sep 2021 | Dissolved | |
| Northstone Concrete Supplies Limited Director • Director | 30 Sep 2020←12 Months→28 Sep 2021 | Dissolved | |
