| Company | Timeline | Status | |
| Gallagher Construction (Northern) Limited Director • Builder | 11 Jul 2000←25 Years→Current | Liquidation | |
| G C N Developments Limited Director • Unreported | 20 Nov 1996←28 Years→Current | Active | |
| G C N Plant Limited Director • Builder | 20 Nov 1996←28 Years→26 May 2025 | Dissolved | |
| Gallagher Construction (Northern) Limited Director • Builder | 5 Nov 1993←3 Years→13 Mar 1997 | Liquidation | |
