| 1 | Southern Health Board | Ireland | Cork | Wilton | Cork | T12 PN8P | N/A | 2018 | $19,756,698,310 | 107,972 | N/A | N/A | N/A |
| 2 | ST. Vincent's Healthcare Group | Ireland | Dublin | Anaesthesia | Dublin | D04 T6F4 | svhglibrary.***** | 2001 | $710,531,760 | 4,872 | N/A | N/A | 338585 |
| 3 | Liberty Medical Services LIMITED | Ireland | Ballina | Foxford Road | Meath | N/A | N/A | 2007 | $547,633,273 | 40 | N/A | N/A | 435729 |
| 4 | Ge Healthcare Ireland LIMITED | Ireland | Carrigtohill | Ida Business Park | Cork | T45 AV60 | N/A | 1990 | $526,668,594 | 727 | N/A | N/A | 166586 |
| 5 | Bristol-Myers Squibb Manufacturing Company Unlimited Company | Ireland | Mulhuddart | Cruiserath Road | Dublin | D15 H6EF | N/A | 2000 | $382,047,000 | 391 | N/A | N/A | 324960 |
| 6 | Nua Healthcare Services LIMITED | Ireland | Naas | 3rd Floor | Kildare | W91 WC78 | nuahealthcare.***** | 2004 | $146,525,780 | 2,467 | N/A | N/A | 389274 |
| 7 | Wyeth Pharmaceuticals LIMITED | Ireland | Dublin | The Watermarque | Dublin | N/A | N/A | 2006 | $144,213,738 | 90 | N/A | N/A | 421238 |
| 8 | Upmc Sports Surgery Clinic LIMITED | Ireland | Dublin 9 | Santry Demesne | Dublin | D09 C523 | N/A | 2006 | $83,848,757 | 516 | N/A | N/A | 419994 |
| 9 | Noc LIMITED | Ireland | Dublin 24 | 16 Harcourt Street | Dublin | D02NN29 | nurseoncall.***** | 1988 | $77,812,607 | 1,423 | N/A | N/A | 137948 |
| 10 | Eurofins Biomnis Ireland LIMITED | Ireland | Dublin | Three Rock Road | Dublin | D18 | N/A | 1991 | $45,683,041 | 204 | N/A | N/A | 176482 |
| 11 | Dental Care Ireland Management LIMITED | Ireland | Dublin 3 | Unit 7, the Seapoint Building | Dublin | N/A | N/A | 2014 | $44,649,599 | 305 | N/A | N/A | 550111 |
| 12 | Cheeverstown House Company LIMITED By Guarantee | Ireland | Dublin | 210 Templeogue Road | Dublin | D6W CX76 | cheeverstown.***** | 1975 | $43,013,526 | 144 | N/A | N/A | 50235 |
| 13 | Utah Medical Products LIMITED | Ireland | Athlone | Business and Technology Park | West Meath | N37 XK74 | utahmed.***** | 1996 | $41,278,000 | 25 | N/A | N/A | 903778 |
| 14 | Bon Secours Hospital Limerick Dev CO LIMITED | Ireland | Limerick | Georges Quay | Limerick | N/A | bonsecours.***** | 1995 | $39,731,509 | 3 | N/A | N/A | 236675 |
| 15 | Centric Health Primary Care LIMITED | Ireland | Dundrum | Rsa House | Dublin | D16 FC92 | centrichealth.***** | 2009 | $38,579,562 | 285 | N/A | N/A | 473446 |
| 16 | Blackrock Clinic Unlimited Company | Ireland | Blackrock | Rock Road | Dublin | A94 R1X4 | blackrock-clinic.***** | 1986 | $28,509,795 | 555 | N/A | N/A | 87523 |
| 17 | Milford Care Centre | Ireland | Limerick | Plassey Park Road | Limerick | V94 H795 | milfordcarecentre.***** | 1998 | $28,139,022 | 402 | N/A | N/A | 291969 |
| 18 | Smith & Nephew (ireland) Trading LIMITED | Ireland | Dublin | 9 Clare Street | Dublin | D02 HH30 | N/A | 1933 | $22,860,557 | 19 | N/A | N/A | 8596 |
| 19 | Upmc Kildare Hospital LIMITED | Ireland | Naas | Prosperous Road | Kildare | N/A | upmc.***** | 1983 | $22,021,427 | 124 | N/A | N/A | 98117 |
| 20 | South West Doctors-On-Call Company LIMITED By Guarantee | Ireland | Killarney | Floors 2 and 3 Hilliard House | Kerry | N/A | N/A | 2001 | $19,550,648 | 198 | N/A | N/A | 341520 |
| 21 | Global Diagnostics (ireland) LIMITED | Ireland | Dundrum | 1st Floor North Block | Dublin | D16 W7W3 | N/A | 2007 | $18,262,126 | 156 | N/A | N/A | 441761 |
| 22 | Alliance Medical Diagnostic Imaging (northern Ireland) LIMITED | Ireland | Limerick | Portal House, Raheen Business Park | Limerick | V94FHX7 | alliancemedical.***** | 2006 | $17,392,455 | 47 | N/A | N/A | 417462 |
| 23 | Medmark LIMITED | Ireland | Dublin | 69 Lower Baggot Street | Dublin | D02 HW52 | medmark.***** | 1991 | $15,307,745 | 106 | N/A | N/A | 182438 |
| 24 | Beacon Dialysis Services LIMITED | Ireland | Dublin | Beacon Hall Beacon Court, Suite 36 | Dublin | N/A | N/A | 2003 | $13,612,018 | 95 | N/A | N/A | 376053 |
| 25 | Mosney Unlimited Company | Ireland | Julianstown | Mosney | Meath | A92 VA03 | N/A | 1947 | $10,151,197 | 84 | N/A | N/A | 11917 |
| 26 | A N H Healthcare LIMITED | Ireland | Dublin | 58 Park Avenue | Dublin | D04Y437 | N/A | 2011 | $10,111,023 | 181 | N/A | N/A | 501318 |
| 27 | Tara Winthrop Private Clinic LIMITED | Ireland | Dublin | The Mall, Beacon Court | Dublin | D18 AYF3 | N/A | 2019 | $9,870,313 | 157 | N/A | N/A | 654222 |
| 28 | B.braun Wellstone LIMITED | Ireland | Dublin 12 | 3 Naas Road Industrial Park | Dublin | D12H5TF | N/A | 2005 | $9,599,756 | 75 | N/A | N/A | 398076 |
| 29 | Csh Childcare Services | Ireland | Dublin | Leopardstown Road | Dublin | N/A | N/A | 2011 | $9,250,746 | 110 | N/A | N/A | 504847 |
| 30 | Lisheen Nursing Centre LIMITED | Ireland | Rathcoole | Stoney Lane | Dublin | N/A | N/A | 1988 | $9,138,400 | 149 | N/A | N/A | 136823 |
| 31 | The Sims Clinic LIMITED | Ireland | Dublin 14 | The Sims Building | Dublin | D14 A312 | sims.***** | 1997 | $8,264,608 | 85 | N/A | N/A | 280514 |
| 32 | Small Foundation | Ireland | Dublin | 30 Merrion Square North | Dublin | D02 VE40 | smallfoundation.***** | 2007 | $8,166,615 | 10 | N/A | N/A | 447577 |
| 33 | Aquilant Scientific (roi) LIMITED | Ireland | Saggart | Citywest Shopping | Dublin | D24 KOYT | N/A | 1977 | $7,341,402 | 10 | N/A | N/A | 57582 |
| 34 | Primacare Health Professionals LIMITED | Ireland | Dundrum | Rsa House | Dublin | D16 FC92 | centrichealth.***** | 2006 | $7,315,874 | 52 | N/A | N/A | 430319 |
| 35 | Nrh Foundation | Ireland | Dun Laoghaire | Rochestown Avenue | Dublin | A96 E2H2 | N/A | 1984 | $5,787,055 | 3 | N/A | N/A | 93124 |
| 36 | County Kilkenny Leader Partnership Company LIMITED By Guarantee | Ireland | Kilkenny | Court Patricks Street | Kilkenny | R95 X72F | N/A | 2008 | $5,681,553 | 52 | N/A | N/A | 454899 |
| 37 | Beacon Oncology Sandyford LIMITED | Ireland | Dublin 18 | Beacon Hospital, Beacon Court | Dublin | D18AK68 | N/A | 2006 | $5,205,465 | 22 | N/A | N/A | 425814 |
| 38 | College Of Anaesthesiologists Of Ireland | Ireland | Dublin | 22 Merrion Square North | Dublin | D02 X236 | anaesthesia.***** | 1996 | $5,029,737 | 27 | N/A | N/A | 249517 |
| 39 | Valley Healthcare Designated Activity Company | Ireland | Dublin | 55 Charlemont Place | Dublin | D02 F985 | N/A | 2017 | $4,717,724 | 20 | N/A | N/A | 596239 |
| 40 | Eurofins Mc Pathology LIMITED | Ireland | Dublin | Three Rock Road | Dublin | D18 | N/A | 2016 | $3,962,507 | 18 | N/A | N/A | 589955 |
| 41 | Ecce & Play Early Childhood Ireland | Ireland | Dublin 24 | Hainault House Belgard Square South | Dublin | D24RFV0 | earlychildhoodireland.***** | 2011 | $3,804,108 | 45 | N/A | N/A | 506235 |
| 42 | Strongbridge Biopharma LIMITED | Ireland | Dublin 24 | Fitzwilliam Hall Suite 206 | Dublin | N/A | N/A | 2015 | $3,698,568 | 72 | N/A | N/A | 562659 |
| 43 | Empowerment Plus Company LIMITED By Guarantee | Ireland | Dublin | 10 Earlsfort Terrace | Dublin | D02 T380 | empowermentplus.***** | 2008 | $3,420,648 | 99 | N/A | N/A | 461361 |
| 44 | Charter Medical Group LIMITED | Ireland | Dublin 7 | The Forge | Dublin | N/A | chartermedical.***** | 2005 | $3,146,626 | 40 | N/A | N/A | 401207 |
| 45 | Point Of Care Health Services LIMITED | Ireland | Dublin | 4045 Kingswood Road | Dublin | N/A | pochealth.***** | 2007 | $3,126,884 | 17 | N/A | N/A | 438538 |
| 46 | The Dublin Well Woman Centre Company LIMITED By Guarantee | Ireland | Dublin | 67 Pembroke Road | Dublin | D04 E6F4 | wellwomancentre.***** | 1977 | $3,045,155 | 34 | N/A | N/A | 59290 |
| 47 | Everlight Radiology (ireland) LIMITED | Ireland | Dublin | 29 Earlsfort Terrace | Dublin | D02 AY28 | N/A | 2019 | $2,920,175 | 4 | N/A | N/A | 652426 |
| 48 | Schizophrenia Association Of Ireland | Ireland | Maynooth | Block B, Maynooth Business Camp | Kildare | W23W5X7 | N/A | 1979 | $2,731,351 | 33 | N/A | N/A | 70462 |
| 49 | North West Hospice Charity Company LIMITED By Guarantee | Ireland | Sligo | The Mall Mews | Sligo | N/A | northwesthospice.***** | 1987 | $2,729,475 | 20 | N/A | N/A | 119501 |
| 50 | Steadfast House Company LIMITED By Guarantee | Ireland | Carrickmacross | Steadfast House | Monaghan | A81 RD29 | N/A | 1996 | $2,637,928 | 51 | N/A | N/A | 254471 |
| 51 | The Binding Site Ireland LIMITED | Ireland | Dublin | First Floor | Dublin | N/A | N/A | 2021 | $2,474,657 | 3 | N/A | N/A | 685398 |
| 52 | Avalere Health Ireland LIMITED | Ireland | Dublin | 1 Stokes Place | Dublin | D02 DE03 | N/A | 2022 | $2,358,741 | 19 | N/A | N/A | 729832 |
| 53 | Cordis Medical Ireland LIMITED | Ireland | Cashel | Cahir Road | North Tipperary | E25 RC92 | N/A | 2021 | $2,219,229 | 1 | N/A | N/A | 692108 |
| 54 | Barringtons Hospital LIMITED | Ireland | Limerick | Georges Quay | Limerick | N/A | bonsecours.***** | 1991 | $2,054,760 | 78 | N/A | N/A | 172854 |
| 55 | Institute Of Eye Surgery LIMITED | Ireland | Dublin | 117 Baggot Court | Dublin | D02DD42 | ioes.***** | 2018 | $2,054,760 | 68 | N/A | N/A | 620845 |
| 56 | River Global Healthcare LIMITED | Ireland | Dublin 3 | 62 Clontarf Road | Dublin | D03X6X9 | N/A | 2019 | $2,054,760 | 40 | N/A | N/A | 646450 |
| 57 | Fleetwood Healthcare LIMITED | Ireland | Greystones | Unit 5, Bromley Business Park | Wicklow | A63X924 | fleetwoodhealthcare.***** | 1998 | $2,054,760 | 40 | N/A | N/A | 283215 |
| 58 | Eye To Eye Designated Activity Company | Ireland | Waterford | Worklab | Waterford | X91 DC96 | N/A | 2019 | $2,054,760 | 40 | N/A | N/A | 650545 |
| 59 | Institute Of Eye Surgery Holdings Designated Activity Company | Ireland | Waterford | Worklab | Waterford | X91 DC96 | N/A | 2019 | $2,054,760 | 40 | N/A | N/A | 651028 |
| 60 | Repromed Holdings LIMITED | Ireland | Dublin | 5th Floor North Block | Dublin | D16 W7W3 | repromed.***** | 2016 | $2,054,760 | 40 | N/A | N/A | 577870 |
| 61 | River Global Life Science LIMITED | Ireland | Dublin 3 | 62 Clontarf Road | Dublin | D03X6X9 | N/A | 2019 | $2,054,760 | 40 | N/A | N/A | 646449 |
| 62 | Bio Md Holdings LIMITED | Ireland | Dublin | First Floor, Suite 36 Beacon Hall | Dublin | D18 T8P3 | N/A | 2025 | $2,054,760 | 40 | N/A | N/A | 779326 |
| 63 | Baby Scan LIMITED | Ireland | Dublin 16 | 4th Floor North Block Rockfield Medical Campus | Dublin | D16W7W3 | N/A | 2006 | $2,054,760 | 40 | N/A | N/A | 418415 |
| 64 | Oregon Healthcare LIMITED | Ireland | Dublin | Suite 14 Blackrock Clinic | Dublin | A94E4X7 | sshi.***** | 2025 | $2,054,760 | 9 | N/A | N/A | 782695 |
| 65 | Glencar Medical LIMITED | Ireland | Donabate | Unit 2 Redleaf Business Park | Dublin | K36 WN62 | N/A | 1989 | $2,054,760 | 7 | N/A | N/A | 141847 |
| 66 | Trustuswecare Company LIMITED By Guarantee | Ireland | Dublin | Tws House 1-2 Main Street | Dublin | D24 | N/A | 2009 | $1,986,861 | 60 | N/A | N/A | 469562 |
| 67 | Lee Clinic Dermatologists LIMITED | Ireland | Cork | Lee Road Lee Clin., Suite 12 | Cork | N/A | leeclinicdermatology.***** | 2008 | $1,796,897 | 8 | N/A | N/A | 451594 |
| 68 | ST. Vincent's Foundation | Ireland | Dublin | 4 Elm Park | Dublin | D04 W6N7 | stvincents.***** | 2008 | $1,790,388 | 20 | N/A | N/A | 464228 |
| 69 | Belmont Medical Unlimited Company | Ireland | Dublin | Hadleigh | Dublin | D06E6T2 | N/A | 2010 | $1,756,618 | 20 | N/A | N/A | 489989 |
| 70 | Ballyfermot Youth Service Company LIMITED By Guarantee | Ireland | Dublin | 41 Decies Road | Dublin | D10 CP29 | ballyfermotyouthservice.***** | 2001 | $1,455,147 | 12 | N/A | N/A | 339290 |
| 71 | Beacon Dental LIMITED | Ireland | Dublin | Beacon Consultants Clinic | Dublin | D18 E7P4 | beacondental.***** | 2012 | $1,455,045 | 8 | N/A | N/A | 508773 |
| 72 | Matt Talbot Adolescent Services Company LIMITED By Guarantee | Ireland | Cork | Trabeg Lawn | Cork | N/A | N/A | 1999 | $1,286,103 | 14 | N/A | N/A | 301969 |
| 73 | Upmc Global Operations Center LIMITED | Ireland | Santry Demesne | Building One Swift Square | Dublin | D09 A0E4 | N/A | 2005 | $1,269,010 | 49 | N/A | N/A | 407214 |
| 74 | Momentum Medical Services LIMITED | Ireland | Dublin | 5 Harvard Close Ardilea | Dublin | D14 K194 | N/A | 2017 | $1,233,526 | 40 | N/A | N/A | 609782 |
| 75 | Fethard And District Day Care Centre Company LIMITED By Guarantee | Ireland | Clonmel | Presentation Convent | North Tipperary | E91 RR94 | N/A | 2007 | $1,214,726 | 20 | N/A | N/A | 441903 |
| 76 | The Psychological Society Of Ireland | Ireland | Dublin | Digital Office Centre Camden | Dublin | D08 R9CN | N/A | 1985 | $1,211,363 | 10 | N/A | N/A | 110772 |
| 77 | The Cork County Childcare Committee | Ireland | Buttevant | Market House | Cork | N/A | N/A | 2002 | $1,180,284 | 13 | N/A | N/A | 364651 |
| 78 | Harland Medical Systems Europe LIMITED | Ireland | Cork | Unit 1 Cherrywood Business Park | Cork | T45 XP70 | N/A | 2021 | $1,141,504 | 2 | N/A | N/A | 702008 |
| 79 | Ballon Rathoe Childcare Facility Company LIMITED By Guarantee | Ireland | Carlow | Carlow Enterprise Centre | Carlow | N/A | N/A | 2009 | $1,114,030 | 30 | N/A | N/A | 469382 |
| 80 | Dawson Charitable Foundation Services | Ireland | Dublin 24 | Davy House | Dublin | D02PY05 | N/A | 2008 | $1,074,659 | 2 | N/A | N/A | 463655 |
| 81 | Clanwilliam Institute: Family And Relationship Psychotherapy, Education And Consultation | Ireland | Blackrock | Lynx House | Dublin | A94 E4Y0 | clanwilliam.***** | 1984 | $1,064,282 | 11 | N/A | N/A | 103733 |
| 82 | Ccss Company LIMITED By Guarantee | Ireland | Carlow | Equity House | Carlow | R93 K7W4 | N/A | 2011 | $978,274 | 10 | N/A | N/A | 493738 |
| 83 | The Dublin Neurological Institute | Ireland | Dublin | 57 Eccles Street | Dublin | D07 W7XF | neurologicalinstitute.***** | 2009 | $961,562 | 8 | N/A | N/A | 476924 |
| 84 | Sligo Leitrim Home Youth Liaison Service Company LIMITED By Guarantee | Ireland | Sligo | 1st Floor Castlewood Centre | Sligo | F91KX05 | homeyouthliaisonservice.***** | 2002 | $939,260 | 16 | N/A | N/A | 357947 |
| 85 | The Royal Hospital Donnybrook Voluntary Housing Association Company LIMITED By Guarantee | Ireland | Dublin | Morehampton Road | Dublin | D04 HX40 | friendsofrhd.***** | 1991 | $926,183 | 4 | N/A | N/A | 180825 |
| 86 | Rayner Surgical (ireland) LIMITED | Ireland | Dublin | 2nd Floor Palmerston House | Dublin | D02 WD37 | N/A | 2021 | $919,835 | 40 | N/A | N/A | 692763 |
| 87 | Gp Care For All | Ireland | Dublin | Heritage House | Dublin | D02 AR55 | obriens.***** | 2017 | $854,903 | 11 | N/A | N/A | 614078 |
| 88 | Buttevant Area Community Project | Ireland | Mallow | C/o le Cheile Family Centre Mallow | Cork | N/A | N/A | 2008 | $820,635 | 43 | N/A | N/A | 462954 |
| 89 | Algorithmic Health Ireland LIMITED | Ireland | Dublin | 2 Shelbourne Buildings | Dublin | D04 W3V6 | N/A | 2021 | $801,451 | 6 | N/A | N/A | 691568 |
| 90 | North East Marquees LIMITED | Ireland | Drogheda | 71 Boyne Business Park | Louth | A92 XF57 | northeastmarquees.***** | 1998 | $796,751 | 13 | N/A | N/A | 284002 |
| 91 | Mid-Western Hospitals Development Trust | Ireland | Limerick | Univ. Hospital Limerick | Limerick | V94 F858 | N/A | 1986 | $764,598 | 1 | N/A | N/A | 114507 |
| 92 | Ultralase Ireland LIMITED | Ireland | Dublin | 88 Harcourt Street | Dublin | D02DK18 | N/A | 2008 | $757,301 | 4 | N/A | N/A | 465490 |
| 93 | The Wicklow County Childcare Committee Company LIMITED By Guarantee | Ireland | Wicklow | Unit C6 Wicklow Enterprise Centre | Wicklow | N/A | N/A | 2002 | $750,551 | 8 | N/A | N/A | 364781 |
| 94 | Bocan Community Creche Company LIMITED By Guarantee | Ireland | Donegal | Bocan | Donegal | F93 CYK1 | N/A | 2008 | $737,301 | 37 | N/A | N/A | 463507 |
| 95 | Galway Cardiology Unlimited Company | Ireland | Galway | Suite 34 Galway Clinic | Galway | H91HHT0 | N/A | 2010 | $737,063 | 4 | N/A | N/A | 480479 |
| 96 | Conna Community Childcare Company LIMITED By Guarantee | Ireland | Cork | Conna | Cork | N/A | N/A | 2008 | $709,526 | 26 | N/A | N/A | 457279 |
| 97 | The Rotunda Foundation | Ireland | Dublin | Parnell Square | Dublin | N/A | rotundafoundation.***** | 1973 | $656,367 | 2 | N/A | N/A | 41035 |
| 98 | Anchor Childcare Centre Company LIMITED By Guarantee | Ireland | Dublin | Racecourse Shopping Centre Baldoyle Dublin 13 | Dublin | N/A | anchorchildcare.***** | 2007 | $651,614 | 15 | N/A | N/A | 446288 |
| 99 | Donegal Women's Centre | Ireland | Donegal | Port Road | Donegal | N/A | donegalwomenscentre.***** | 1989 | $636,293 | 16 | N/A | N/A | 149831 |
| 100 | Lifestart Services Company LIMITED By Guarantee | Ireland | Lifford | Main Street | Donegal | N/A | lifestartfoundation.***** | 2011 | $620,678 | 15 | N/A | N/A | 495841 |