| ACS Civils Limited R2: 1C 3C, R3: 1C 3C, R7: 1C 3C shared | · | · | active |
| Alun Griffiths (Contractors) Limited R4: 1R 2R 3R 6C 7R 8C, R5: 1R 2R 3R 6C 7R 8C, shared | · | · | active |
| Alun Griffiths (Contractors) Limited R4: 1R, R5: 1C shared | · | · | active |
| Alun Griffiths (Contractors) Limited R4: 3R 6C 8C, R5: 1R 2R 3R 6C 8C shared | · | · | active |
| Alun Griffiths (Contractors) Limited R5: 1R 2R shared | · | · | active |
| Amalgamated Construction Limited R1a: 1C 2C 3C 4C 5C 6C 7C 9C, R1b: 1C 2C 3C 4C 5C 6C 7C 9C, R1c: 1C 2C 3C 4C 5C 6C 7C 9C, R1d: 1C 2C 3C 4C 5C 6C 7C 9C, R2: 2R 4R 5C 6C 7C 9C, R3: 2R 3R 4C 5C 6C 7C 9C, R4: 1C 2C 3C 4C 5C 6C 7C 9C, R5: 1C 2C 3C 4C 5C 6C 7C 9C, R6: 1C 2C 3C 4C 5C 6C 7C 9C shared | · | · | active |
| Amalgamated Construction Limited R1a: 1C 2C 3C 5C 9C, R1b: 1C 2C 3C 5C 9C, R1c: 1C 2C 3C 5C 9C, R1d: 1C 2C 3C 5C 9C, R2: 3R 5C 9C, R3: 3R 5C 9C, R4: 2R 3C 5C 9C, R5: 1C 2C 3C 5C 9C, R6: 3C 5C 9C shared | · | · | active |
| Associated Asphalt Contracting Limited R3: 8R, R4: 8R, R6: 8C shared | · | · | active |
| Bethell Construction Limited R2: 6R 8R, R3: 6R 8C shared | · | · | active |
| Britannia Construction Limited R3: 9C, R4: 4C 6C 9C shared | · | · | active |
| Buckingham Group Contracting Limited - Buckingham R2: 1C 2C, R3: 1C 2C, R6: 1C 2C shared | · | · | active |
| Clancy Docwra Limited R1a: 4C 6C 7C, R1b: 4C 6C 7C shared | · | · | active |
| Clancy Docwra Limited R2: 4R 6R 7R, R3: 4R 6R 7R, R6: 4R 6C 7R shared | · | · | active |
| Clancy Docwra Limited R2: 4R, R3: 4R, R6: 4R shared | · | · | active |
| Clancy Docwra Limited R6: 4C shared | · | · | active |
| Colas Limited R2: 1C 2C 3C 8C, R3: 1R 2C 3C 8C, R4: 1C 2C 3C 8C, R5: 1C 2C 3C 8C, R6: 1C 2C 3C 8C, R7: 1C 2C 3C 8C shared | · | · | active |
| Colas Limited R2: 1C 2C, R3: 1R 2C, R4: 1C 2C, R5: 1C 2C, R6: 1R 2C, R7: 1C 2C shared | · | · | active |
| Colas Limited R2: 1R 2C 8C, R3: 1R 2C 8C, R4: 1R 2C 8C, R5: 1C 2C 8C, R6: 1R 2C 8C, R7: 1C 2C 8C shared | · | · | active |
| CR Reynolds Limited R2: 1C, R3: 1C shared | · | · | active |
| C Spencer Limited R1a: 1C 2C 3C 5C 7C, R1b: 1C 2C 3C 5C 7C, R1c: 1C 2C 3C 5C 7C, R2: 3R 5C 7R, R3: 3R 5C 7R, R4: 2R 3C 5C 7C, R5: 1C 2R 3C 5C 7C, R6: 3R 5C 7C shared | · | · | active |
| C Spencer Limited R1a: 1C 2C 3C 5C 7C, R1b: 1C 2C 3C 5C 7C, R1c: 1C 2C 3C 5C 7C, R2: 5C 7R, R3: 5C 7R, R4: 1R 2R 3R 5C 7C, R5: 1R 2R 3R 5C 7R, R6: 1R 2R 3R 5C 7C shared | · | · | active |
| C Spencer Limited R1a: 1C 2C 3C 5C 7C, R1b: 1C 2C 3C 5C 7C, R1c: 1C 2C 3C 5C 7C, R2: 5C 7R, R3: 5C 7R, R4: 2R 3R 5C 7C, R5: 1C 2C 3R 5C 7C, R6: 3R 5C 7C shared | · | · | active |
| Danaher & Walsh (Civil Engineering) Limited R3: 4R 6C 7R, R6: 1R 2R 3R 4C 6C 7R shared | · | · | active |
| Dawson-Wam Limited R1a: 3C, R1b: 3C, R1c: 3C, R1d: 3C, R7: 3C 6C shared | · | · | active |
| Eric Wright Civil Engineering Limited R2: 1C 2C 3C, R3: 1C 2C 3C, R5: 1C 2C 3C shared | · | · | active |
| Esh Construction Limited R2: 1R shared | · | · | active |
| Esh Construction Limited R2: 1R 2C 3R 4C 6C 7C 8C 9C shared | · | · | active |
| Esh Construction Limited R2: 3C 4C 6C 7C shared | · | · | active |
| Fox Building and Engineering Limited R2: 2R 4R 6C 7R 9C, R3: 2R 4R 6C 7C 9C, R4: 1R 2R 3R 4C 6C 7C 9C, R5: 1C 2C 3R 4C 6C 7C 9C, R6: 1R 2R 3C 4C 6C 7C 9C, R7: 1C 2C 3C 4C 6C 7C 9C shared | · | · | active |
| Fox Building and Engineering Limited R2: 3R 4R 6R 9C, R3: 3R 4C 6C 9C, R4: 3R 4C 6C 9C, R5: 1C 3C 4C 6C 9C, R6: 3R 4C 6C 9C, R7: 1C 3C 4C 6C 9C shared | · | · | active |
| Fox Building and Engineering Limited R5: 1C, R7: 1C shared | · | · | active |
| FP McCann Limited R7: 1C shared | · | · | active |
| FP McCann Limited R7: 1C 2C shared | · | · | active |
| Galliford Try Construction Limited R2: 1R, R3: 1R, R4: 1C shared | · | · | active |
| Galliford Try Construction Limited R2: 1R, R3: 1R, R4: 1R shared | · | · | active |
| Galliford Try Construction Limited R4: 1R shared | · | · | active |
| Howard Civil Engineering Limited R2: 1C 3C 6C shared | · | · | active |
| Jackson Civil Engineering Group Limited R6: 3R shared | · | · | active |
| J Hopkins (Contractors) Limited R2: 8R shared | · | · | active |
| JN Bentley Limited R2: 3R 6C 7C, R3: 3R 6C 7C, R5: 3C 6C 7C shared | · | · | active |
| JN Bentley Limited R2: 3R 6C 7R, R3: 3R 6C 7C, R5: 3C 6C 7C, shared | · | · | active |
| JN Bentley Limited R2: 4C 5C 6C 7C 8C, R3: 3R 4C 5C 6C 7C, R4: 8C, R5: 1C 3C 4C 5C 6C 7C 8C shared | · | · | active |
| John Graham Construction Limited R1a: 1C 2C 3C 4C 5C 6C 7C 8C, R1b: 1C 2C 3C 4C 5C 6C 7C 8C, R1c: 1C 2C 3C 4C 5C 6C 7C 8C, R1d: 1C 2C 3C 4C 5C 6C 7C 8C, R2: 1C 2C 3C 4C 5C 6C 7C 8C, R3: 1C 2C 3C 4C 5C 6C 7C 8C, R4: 1C 2C 3C 4C 5C 6C 7C 8C, R6: 1C 2C 3C 4C 5C 6C 7C 8C, R7: 1C 2C 3C 4C 5C 6C 7C 8C shared | · | · | active |
| John Graham Construction Limited R1a: 1C 2C 3C 4C 5C 6C 7C, R1b: 1C 2C 3C 4C 5C 6C 7C, R1c: 1C 2C 3C 4C 5C 6C 7C, R1d: 1C 2C 3C 4C 5C 6C 7C, R2: 1C 2C 3C 4C 5C 6C 7C, R3: 1C 2C 3C 4C 5C 6C 7C, R4: 1C 2C 3C 4C 5C 6C 7C, R6: 1C 2C 3C 4C 5C 6C 7C, R7: 1C 2C 3C 4C 5C 6C 7C shared | · | · | active |
| John Graham Construction Limited R1a: 1C 2C 3C 4C 5C 7C, R1b: 1C 2C 3C 4C 5C 7C, R1c: 1C 2C 3C 4C 5C 7C, R1d: 1C 2C 3C 4C 5C 7C, R2: 1C 2C 3C 4C 5C 7C, R3: 1C 2C 3C 4C 5C 7C, R4: 1C 2C 3C 4C 5C 7C, R6: 1C 2C 3C 4C 5C 7C, R7: 1C 2C 3C 4C 5C 7C shared | · | · | active |
| John Graham Construction Limited R7: 1C 2C 3C 4C 5C 6C 7C 8C shared | · | · | active |
| John Sisk and Son (Holdings) Limited R2: 2R 3C, R3: 2R 3C, R4: 1R 2R 3C, R5: 1C 2C 3C, R6: 1R 2R 3C shared | · | · | active |
| John Sisk and Son (Holdings) Limited R2: 2R 3C, R3: 2R 3C, R4: 1R 2R 3C, R5: 1C 2C 3C, R6: 2R 3C shared | · | · | active |
| John Sisk and Son (Holdings) Limited R2: 2R, R3: 2R, R4: 2C, R6: 2C shared | · | · | active |
| John Sisk and Son (Holdings) Limited R2: 2R, R3: 2R, R4: 2R, R6: 2R shared | · | · | active |
| Jones Bros Ruthin (Civil Engineering) Co Limited R1a: 1C 2C 3C 4C 7C, R1b: 1C 2C 3C 4C 7C, R1c: 1C 2C 3C 4C 7C, R1d: 1C 2C 3C 4C 7C, R2: 3R 4R 7R, R3: 3R 4R 7R, R4: 3R 4C 7C, R5: 3R 4C 7R shared | · | · | active |
| Jones Bros Ruthin (Civil Engineering) Co Limited R1a: 1C 2C 3R 4C 7C, R1b: 1C 2C 3R 4C 7C, R1c: 1C 2C 3R 4C 7C, R1d: 1C 2C 3C 4C 7C, R3: 4R 7R, R4: 4R 7R, R5: 2R 3R 4C 7C shared | · | · | active |
| Jones Bros Ruthin (Civil Engineering) Co Limited R1a: 1C 4C 7C, R1b: 1C 4C 7C, R1c: 1C 4C 7C, R1d: 1C 4C 7C, R2: 4C 7R, R3: 4C 7R, R4: 4C 7C, R5: 1R 4C 7C shared | · | · | active |
| Jones Bros Ruthin (Civil Engineering) Co Limited R5: 4R 6R 8R shared | · | · | active |
| Keltbray Built Environment Limited R1a: 4C 7C 9C, R1b: 4C 7C 9C, R1c: 4C 7C 9C, R1d: 4C 7C 9C, R5: 2R, R6: 4R 7R 9C, R7: 1R 2C 4C 7C 9C shared | · | · | active |
| Keltbray Built Environment Limited R1a: 4C 7C, R1b: 4C 7C, R1c: 4C 7C, R1d: 4C 7C, R2: 4R, R5: 2R, R6: 4R 7R, R7: 1C 2C 4C 7C shared | · | · | active |
| Keltbray Built Environment Limited R1a: 4C, R1b: 4C, R1c: 4C, R1d: 4C, R5: 1R 2R, R6: 4R, R7: 1C 2C 4C shared | · | · | active |
| Keltbray Built Environment Limited R4: 2R, R5: 2C, R7: 2C shared | · | · | active |
| Kier Infrastructure and Overseas Limited R2: 1R 2C 3C 4C 5C 6C 7C 8C 9C, R3: 1R 2C 3C 4C 5C 6C 7C 8C 9C, R4: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R5: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R6: 1C 2C 3C 4C 5C 6C 7C 8C 9C shared | · | · | active |
| Kier Infrastructure and Overseas Limited R2: 1R 2C 3C 4C 5C 6C 7C 8C 9C, R3: 1R 2C 3C 4C 5C 6C 7C 8C 9C, R4: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R5: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R6: 1R 2C 3C 4C 5C 6C 7C 8C 9C shared | · | · | active |
| Kier Infrastructure and Overseas Limited R2: 1R 2R 3C 4C 5C 6C 7C 8C 9C, R3: 1R 2R 3C 4C 5C 6C 7C 8C 9C, R4: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R5: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R6: 1R 2R 3C 4C 5C 6C 7C 8C 9C shared | · | · | active |
| Kier Infrastructure and Overseas Limited R2: 1R 2R 3C 4C 5C 6C 7C 8C 9C, R3: 2R 3C 4C 5C 6C 7C 8C 9C, R4: 1R 2C 3C 4C 5C 6C 7C 8C 9C, R5: 1C 2C 3C 4C 5C 6C 7C 8C 9C, R6: 1R 2C 3C 4C 5C 6C 7C 8C 9C shared | · | · | active |
| Lagan Aviation & Infrastructure Limited R2: 8C, R7: 8C shared | · | · | active |
| Lagan Aviation & Infrastructure Limited R2: 8R, R7: 8C shared | · | · | active |
| Lowry Building and Civil Engineering Limited R7: 1C 2C 3C 6C shared | · | · | active |
| Lowry Building and Civil Engineering Limited R7: 6C shared | · | · | active |
| McLaughlin & Harvey Limited R1a: 1C 2C 3C 4C 5C 6C 7C 8C, R1b: 1C 2C 3C 4C 5C 6C 7C 8C, R1c: 1C 2C 3C 4C 5C 6C 7C 8C, R1d: 1C 2C 3C 4C 5C 6C 7C 8C, R2: 1C 2C 3C 4C 5C 6C 7C 8C, R3: 1C 2C 3C 4C 5C 6C 7C 8C, R4: 1C 2C 3C 4C 5C 6C 7C 8C, R6: 1C 2C 3C 4C 5C 6C 7C 8C, R7: 3C shared | · | · | active |
| McLaughlin & Harvey Limited R1a: 3C 4C 5C 8C, R1b: 3C 4C 5C 8C, R1c: 3C 4C 5C 8C, R1d: 3C 4C 5C 8C, R2: 3C 4C 5C 8C, R3: 3C 4C 5C 8C, R4: 3C 4C 5C 8C, R6: 3C 4C 5C 8C, R7: 3C 4C 8C shared | · | · | active |
| McLaughlin & Harvey Limited R1a: 3C 5C 8C, R1b: 3C 5C 8C, R1c: 3C 5C 8C, R1d: 3C 5C 8C, R2: 3C 5C 8C, R3: 3C 5C 8C, R4: 3C 5C 8C, R6: 3C 5C 8C, R7: 3C 8C shared | · | · | active |
| McPhillips (Wellington) Limited R3: 6R, R5: 1R 6C shared | · | · | active |
| McPhillips (Wellington) Limited R3: 6R, R5: 6C shared | · | · | active |
| Meldrum Structural and Civil Engineering Limited R2: 3C shared | · | · | active |
| Mildren Construction Limited R4: 6C 8R, R6: 6C 8C shared | · | · | active |
| Milestone Infrastructure Limited R3: 1C 3C, R4: 1C 3C, R6: 1C 3C shared | · | · | active |
| Milestone Infrastructure Limited R3: 1C, R4: 1C, R6: 1C shared | · | · | active |
| Montel Civil Engineering Limited R3: 1C 3C, R4: 1C 3C shared | · | · | active |
| Montel Civil Engineering Limited R4: 1C shared | · | · | active |
| Morgan Sindall Construction & Infrastructure Limited R1a: 1C 2C 4C 7C, R1b: 1C 2C 4C 7C, R1c: 4C 7C, R1d: 4C 7C, R2: 1C 2C 3C 4C 6C 7C, R3: 1C 2C 3C 4C 6C 7C, R4: 2C, R5: 1C 2C 3C 4C 6C 7C, R6: 1C 2C 3C 4C 6C 7C 8C shared | · | · | active |
| O’Brien Contractors Limited R3: 2C 4C shared | · | · | active |
| Osborne Infrastructure Limited R2: 1C 2C, R3: 1C 2C, R4: 1C 2C, R6: 1C 2C shared | · | · | active |
| Osborne Infrastructure Limited R2: 1R 2C, R3: 1R 2C, R4: 1C 2C, R6: 1C 2C shared | · | · | active |
| PBS Construction (North East) Limited R2: 1R 3R 4C shared | · | · | active |
| P Casey & Co Ltd R2: 6R shared | · | · | active |
| P.P. O’Connor Group Limited R2: 4R 5C 6R 7R 8R, R3: 5C 6R 7R 8R, R5: 4R 5C 6R 7R 8R shared | · | · | active |
| RJ McLeod (Contractors) Limited R1a: 1C 3C 4C 7C, R1b: 1C 3C 4C 7C, R1c: 1C 3C 4C 7C, R1d: 1C 3C 4C 7C shared | · | · | active |
| RJ McLeod (Contractors) Limited R1a: 1C 3C 4R 7C, R1b: 1C 3C 4R 7C, R1c: 1C 3C 4R 7C, R1d: 1C 3C 4R 7C shared | · | · | active |
| RJ McLeod (Contractors) Limited R1a: 1C 3R 4C 7R, R1b: 1C 3R 4C 7R, R1c: 1C 3R 4C 7R, R1d: 1C 3R 4C 7C shared | · | · | active |
| RJ McLeod (Contractors) Limited R1a: 7C, R1b: 7C, R1c: 7C, R1d: 7C shared | · | · | active |
| Sir Robert McAlpine Limited R2: 1C, R3: 1C, R4: 1C, R6: 1C shared | · | · | active |
| Sir Robert McAlpine Limited R2: 1C, R3: 1R, R4: 1C, R6: 1C shared | · | · | active |
| VINCI Construction UK Limited R2: 1C 2C 4C 5C 6C 7C 8C, R3: 1C 2C 4C 5C 6C 7C 8C, R4: 1C 2C 4C 5C 6C 7C 8C, R5: 1C 2C 4C 5C 6C 7C 8C, R6: 1C 2C 4C 5C 6C 7C 8C shared | · | · | active |
| VINCI Construction UK Limited R2: 2C 4C 5C 6C 7C 8C, R3: 2C 4C 5C 6C 7C 8C, R4: 2C 4C 5C 6C 7C 8C, R5: 2C 4C 5C 6C 7C 8C, R6: 2C 4C 5C 6C 7C 8C shared | · | · | active |
| VINCI Construction UK Limited R2: 4C 6C 7C, R3: 4C 6C 7C, R4: 4C 6C 7C, R5: 4C 6C 7C, R6: 4C 6C 7C shared | · | · | active |
| VINCI Construction UK Limited R2: 4C 7C, R3: 4C 7C, R4: 4C 7C, R5: 4C 7C, R6: 4C 7C shared | · | · | active |
| VolkerFitzpatrick Limited R1a: 2C 3C 4C 5C 7C 8C, R1b: 2C 3C 4C 5C 7C 8C, R1c: 2C 3C 4C 5C 7C 8C, R1d: 1C 2C 3C 4C 5C 7C 8C, R2: 2R 3C 4C 5C 7C 8C, R3: 1R 2R 3C 4C 5C 7C 8C, R4: 1R 2C 3C 4C 5C 7C 8C, R5: 1C 2C 3C 4C 5C 7C 8C, R6: 1R 2R 3C 4C 5C 7C 8C, R7: 8C shared | · | · | active |
| VolkerFitzpatrick Limited R1a: 2C 3C 4C 5C 7C 8C, R1b: 2C 3C 4C 5C 7C 8C, R1c: 2C 3C 4C 5C 7C 8C, R1d: 1C 2C 3C 4C 5C 7C 8C, R2: 2R 3C 4C 5C 7C 8C, R3: 2R 3C 4C 5C 7C 8C 9C, R4: 1R 2R 3C 4C 5C 7C 8C 9C, R5: 2C 3C 4C 5C 7C 8C, R6: 1R 2R 3C 4C 5C 7C 8C 9C, R7: 8C shared | · | · | active |
| VolkerFitzpatrick Limited R1a: 3C 4C 5C 7C 8C, R1b: 3C 4C 5C 7C 8C, R1c: 3C 4C 5C 7C 8C, R1d: 1C 2C 3C 4C 5C 7C 8C, R2: 2C 3R 4C 5C 7C 8C, R3: 1R 2C 3R 4C 5C 7C 8C 9C, R4: 2C 3C 4C 5C 7C 8C 9C, R5: 2C 3C 4C 5C 7C 8C, R6: 1C 2C 3C 4C 5C 7C 8C 9C shared | · | · | active |
| VolkerFitzpatrick Limited R1a: 3C 4C 5C 7C 8C, R1b: 3C 4C 5C 7C 8C, R1c: 3C 4C 5C 7C 8C, R1d: 1C 2C 3C 4C 5C 7C 8C, R2: 2R 3C 4C 5C 7C 8C, R3: 2R 3C 4C 5C 7C 8C 9C, R4: 2C 3C 4C 5C 7C 8C 9C, R5: 2C 3C 4C 5C 7C 8C, R6: 1R 2R 3C 4C 5C 7C 8C 9C, R7: 8C shared | · | · | active |
| Whitehouse Construction Co. Limited R3: 4R 6C 8C 9C shared | · | · | active |
| Whitemountain Quarries Limited R2: 8C, R3: 8C, R4: 8C, R5: 1R 8C, R6: 8C, R7: 1C 8C shared | · | · | active |
| Whitemountain Quarries Limited R2: 8C, R3: 8C, R4: 8C, R5: 1R 8C, R6: 8C, R7: 1R 8C shared | · | · | active |
| Whitemountain Quarries Limited R2: 8C, R3: 8C, R4: 8R, R5: 1R 8C, R6: 8C, R7: 1C 8C shared | · | · | active |
| Winvic Construction Limited R3: 2R, R6: 2R shared | · | · | active |
| Winvic Construction Limited R6: 2R shared | · | · | active |