| Company | Timeline | Status | |
| McQuillan Quarries Ltd Director • Director | 2 Apr 2015←8 Years→29 Mar 2024 | Active | |
| Patterson Outdoor Cleaning Solutions Limited Director • Company Director | 14 Nov 2007←16 Years→29 Mar 2024 | Active | |
| John McQuillan (Contracts) Limited Director • Director | 2 Oct 2000←23 Years→29 Mar 2024 | Active | |
| McQuillan Envirocare Limited Director • Director | 20 Nov 1998←25 Years→29 Mar 2024 | Active | |
| Edentrillick Quarries Limited Director • Director | 12 May 1987←36 Years→29 Mar 2024 | Active | |
| McQuillan Developments Limited Director • Director | 14 Dec 1979←44 Years→29 Mar 2024 | Active | |
| McQuillan (Skip Hire) Limited Director • Director | 3 Feb 1978←46 Years→29 Mar 2024 | Active | |
