| Company | Total Turnover | Turnover Ireland | Export Turnover | Sector | |
|---|---|---|---|---|---|
| 1 | Sisk | €2,471,200,000 | €1,394,800,000 | €1,076,400,000 | General Building |
| 2 | Mercury Engineering | €1,600,000,000 | €343,000,000 | €1,257,000,000 | M&E Contracting |
| 3 | Winthrop Technologies Ltd | €1,277,248,601 | €476,076,112 | €801,172,489 | General Building |
| 4 | Jones Engineering Group | €1,027,000,000 | €578,000,000 | €449,000,000 | M&E Contracting |
| 5 | John Paul Construction | €708,000,000 | €567,000,000 | €141,000,000 | General Building |
| 6 | Collen Construction | €675,000,000 | €203,000,000 | €472,000,000 | General Building |
| 7 | Kirby Group Engineering | €636,100,000 | €401,900,000 | €234,200,000 | M&E Contracting |
| 8 | Dornan Group | €589,000,000 | €130,000,000 | €459,000,000 | M&E Contracting |
| 9 | Walls Construction Ltd | €571,000,000 | €571,000,000 | - | General Building |
| 10 | BAM Ireland | €506,000,000 | €463,000,000 | €43,000,000 | General Building |
| 11 | PJ Hegarty & Sons UC | €478,000,000 | €403,000,000 | €75,000,000 | General Building |
| 12 | Suir Engineering Ltd | €429,300,000 | €308,900,000 | €120,400,000 | M&E Contracting |
| 13 | Bennett | €369,000,000 | €274,000,000 | €95,000,000 | General Building |
| 14 | JJ Rhatigan & Company | €351,000,000 | €251,500,000 | €99,500,000 | General Building |
| 15 | Designer Group | €310,000,000 | €124,000,000 | €186,000,000 | M&E Contracting |
| 16 | STS Group | €295,000,000 | €115,873,641 | €179,126,359 | M&E Contracting |
| 17 | Murphy | €250,000,000 | €217,500,000 | €32,500,000 | General Building |
| 18 | Ardmac | €230,000,000 | €140,250,000 | €89,750,000 | General Building |
| 19 | Ellott Group | €215,000,000 | €150,000,000 | €65,000,000 | General Building |
| 20 | Conack Construction ULC | €196,693,213 | €196,693,213 | - | General Building |
| 21 | Wills Bros | €185,000,000 | €145,000,000 | €40,000,000 | Civil Engineering |
| 22 | Errigal Contracts | €157,000,000 | €39,000,000 | €118,000,000 | General Building |
| 23 | Radley Engineering Ltd. | €152,600,000 | €151,900,000 | €700,000 | M&E Contracting |
| 24 | Glanua | €150,000,000 | €110,000,000 | €40,000,000 | Civil Engineering |
| 25 | Flynn | €140,164,069 | €122,021,118 | €18,142,951 | General Building |
| 26 | King & Moffatt Building Services | €123,640,000 | €53,290,000 | €70,350,000 | M&E Contracting |
| 27 | Vision Contracting | €123,200,000 | €123,200,000 | - | General Building |
| 28 | Duggan Brothers (Contractors) Ltd | €119,000,000 | €119,000,000 | - | General Building |
| 29 | Monami Construction | €115,885,598 | €115,885,598 | - | General Building |
| 30 | Jons Civil Engineering Company Ltd | €115,000,000 | €115,000,000 | - | Civil Engineering |
| 31 | Coffey | €114,400,000 | €104,200,000 | €10,200,000 | Civil Engineering |
| 32 | Townmore Construction | €104,000,000 | €82,000,000 | €22,000,000 | General Building |
| 33 | MSL Engineering Ltd | €102,000,000 | €97,000,000 | €5,000,000 | M&E Contracting |
| 34 | ABM Group | €100,400,000 | €71,400,000 | €29,000,000 | General Building |
| 35 | Ganson Building & Civil Eng Contractors Ltd | €97,000,000 | €73,000,000 | €24,000,000 | General Building |
| 36 | Gem Construction Company Limited | €91,200,000 | €91,200,000 | - | General Building |
| 37 | BMD & Company Ltd | €86,800,000 | €86,800,000 | - | M&E Contracting |
| 38 | Clancy Construction | €76,000,000 | €76,000,000 | - | General Building |
| 39 | LeoLynch | €75,200,000 | €65,000,000 | - | M&E Contracting |
| 40 | Lynskey Engineering Ltd | €72,976,000 | €36,978,000 | €35,998,000 | M&E Contracting |
| 41 | Clonmel Enterprises Ltd | €67,854,000 | €67,854,000 | - | Civil Engineering |
| 42 | Stewart Construction | €66,000,000 | €66,000,000 | - | General Building |
| 43 | MMD Construction | €62,600,000 | €62,600,000 | - | General Building |
| 44 | David Flynn Limited | €61,191,277 | €60,750,000 | €441,277 | General Building |
| 45 | Townlink Construction Ltd | €60,000,000 | €60,000,000 | - | General Building |
| 46 | Arkil Holdings Ltd (Arkil Ltd, Plant Hire Ltd) | €53,040,000 | €53,010,000 | €30,000 | Civil Engineering |
| 47 | T&I Fitouts Ltd | €52,000,000 | €52,000,000 | - | General Building |
| 48 | Kilcawley Construction | €51,250,000 | €51,250,000 | - | General Building |
| 49 | ClearyDoyle | €50,000,000 | €50,000,000 | - | General Building |
| 50 | Shareridge Civil Engineering | €49,800,000 | €49,800,000 | - | Civil Engineering |
| 51 | Mannings Construction | €48,000,000 | €30,000,000 | €18,000,000 | General Building |
| 52 | CJK | €46,502,840 | €46,502,840 | - | M&E Contracting |
| 53 | Purcell Construction | €43,600,000 | €43,600,000 | - | General Building |
| 54 | Dominic O’Connor Ltd | €41,930,189 | €41,930,189 | - | M&E Contracting |
| 55 | Rockwell Engineering | €40,000,000 | €40,000,000 | - | M&E Contracting |
| 56 | Tritech Engineering | €36,500,000 | €36,500,000 | - | M&E Contracting |
| 57 | Weltec Engineering | €34,409,504 | €34,409,504 | - | M&E Contracting |
| 58 | Mythen Construction Ltd | €32,343,811 | €32,343,811 | - | General Building |
| 59 | John Cradock Ltd | €31,500,000 | €31,500,000 | - | General Building |
| 60 | T Bourke Ltd | €22,000,000 | €22,000,000 | - | M&E Contracting |