| Maceoghain Construction Ltd CRO 794421 · Kingscourt | Kingscourt | 5 Aug 2025 |
| Eurotas M&e Ltd CRO 792052 · Swanlinbar | Swanlinbar | 2 Jul 2025 |
| Dr Solar and Electrical Services Ltd CRO 791659 · Belturbet | Belturbet | 27 Jun 2025 |
| Matthew Smith Construction & Plant Hire Ltd CRO 785073 · Stradone | Stradone | 1 Apr 2025 |
| Ao Electrical and Solar Ltd CRO 782901 · Loch Gowna | Loch Gowna | 3 Mar 2025 |
| E.S. Sheridan Construction Ltd CRO 778128 · Crosserlough | Crosserlough | 18 Dec 2024 |
| Greyoak Homes Ltd CRO 764832 | — | 27 May 2024 |
| Galetech Modular Solutions Ltd CRO 755498 · Stradone | Stradone | 10 Jan 2024 |
| Green-Lux Construction Ltd CRO 754261 · Ballinagh | Ballinagh | 18 Dec 2023 |
| Falcon Electrical Ltd CRO 753454 · Kingscourt | Kingscourt | 6 Dec 2023 |
| Eirevolt Energy Ltd CRO 750698 | — | 18 Oct 2023 |
| Conal McGrath Electrics Ltd CRO 747915 · Virginia | Virginia | 4 Sep 2023 |
| Vilvas Roofing Expert Ltd CRO 747681 · Belturbet | Belturbet | 30 Aug 2023 |
| Willie Bennett Construction Ltd CRO 746118 · Belturbet | Belturbet | 2 Aug 2023 |
| C Gaughan Contracts Ltd CRO 743337 · Shercock | Shercock | 19 Jun 2023 |
| Reenellen Project Services Ltd CRO 725449 · Virginia | Virginia | 7 Sep 2022 |
| Infinity Plumbing & Heating Services Ltd CRO 722619 · Ballinagh | Ballinagh | 14 Jul 2022 |
| Decarb Contracts Ltd CRO 719547 · Virginia | Virginia | 23 May 2022 |
| Thermech Engineering Ltd CRO 717006 · Rocklands | Rocklands | 7 Apr 2022 |
| C.W.M. Groundworks Ltd CRO 711303 · Kilcogy | Kilcogy | 10 Jan 2022 |
| Gardenzone Ltd CRO 680965 · Virginia | Virginia | 3 Nov 2020 |
| MK Living Designs Ltd CRO 666401 | — | 12 Feb 2020 |
| Celtic Working Platforms Ltd CRO 655141 · Ballyconnell | Ballyconnell | 14 Aug 2019 |
| McDonald Concrete Works Ltd CRO 645012 · Cootehill | Cootehill | 4 Mar 2019 |
| Aneuco Ltd CRO 637931 · Virginia | Virginia | 16 Nov 2018 |
| Delta Pipe Fabrication Ltd CRO 624579 | — | 13 Apr 2018 |
| JJR Insulation Ltd CRO 622076 · Carrickaboy | Carrickaboy | 27 Feb 2018 |
| S. Coleman Construction Ltd CRO 616781 · Ballyjamesduff | Ballyjamesduff | 7 Dec 2017 |
| Kore Retrofit Ltd CRO 611230 · Ballinagh | Ballinagh | 8 Sep 2017 |
| Corravilla Electrical Ltd CRO 604001 · Bailieborough | Bailieborough | 10 May 2017 |
| Paul Kelly Contracting Ltd CRO 602640 | — | 20 Apr 2017 |
| Nextgen Electrical Ltd CRO 602135 · Bailieborough | Bailieborough | 10 Apr 2017 |
| John Hurt Environmental Ltd CRO 601756 · Kingscourt | Kingscourt | 4 Apr 2017 |
| Dba Breffni Electrical Ltd CRO 594138 · Belturbet | Belturbet | 7 Dec 2016 |
| FW Scaffolding Ltd CRO 589303 · Kilcogy | Kilcogy | 14 Sep 2016 |
| Jason O'Reilly Plant Hire Ltd CRO 568300 · Ballinagh | Ballinagh | 16 Sep 2015 |
| Erne Valley Construction Ireland and UK Ltd CRO 567188 · Gowna | Gowna | 27 Aug 2015 |
| K&S Welding Engineering Ltd CRO 565048 · Virginia | Virginia | 16 Jul 2015 |
| Cavan Painters Ltd CRO 564781 | — | 10 Jul 2015 |
| Ak Plumbing & Heating Ltd CRO 561931 | — | 18 May 2015 |
| Indepth Leak Detection Ltd CRO 519863 | — | 9 Nov 2012 |
| Ramor Renewable Heating and Plumbing Ltd CRO 474492 | — | 26 Aug 2009 |
| Pat Connell Plumbing & Heating Ltd CRO 418518 · Virginia | Virginia | 12 Apr 2006 |
| Cowan Heating & Plumbing Ltd CRO 393063 · Ballinagh | Ballinagh | 1 Nov 2004 |
| Mannok Insulation Ltd CRO 388369 · Ballyconnell | Ballyconnell | 6 Jul 2004 |
| Romac Acoustics Ltd CRO 335464 · Cootehill | Cootehill | 17 Nov 2000 |
| M.F.M. (Joinery) Ltd CRO 310975 · Ballyhaise | Ballyhaise | 13 Aug 1999 |
| B. G. Carpentry Services Ltd CRO 305416 | — | 16 Apr 1999 |
| Laurence Mechanical Services Ltd CRO 190082 | — | 10 Jun 1992 |
| P & S Civil Works Ltd CRO 102507 | — | 3 Aug 1984 |
