| 1 | Splex Group | €268.2M | 350 | 70 |
| 2 | alison university | €186.6M | 20,000 | 70 |
| 3 | Loughnanes of Galway | €177.9M | 350 | 70 |
| 4 | university of galway college of arts, social sciences and celtic studies | €85.8M | 750 | 60 |
| 5 | celestica - ireland | €73.2M | 750 | 60 |
| 6 | Honorable Life | €58.4M | 350 | 60 |
| 7 | The Galmont Hotel & Spa, Galway | €57.5M | 350 | 60 |
| 8 | The Callanan Group | €57.5M | 350 | 60 |
| 9 | GMIT Tourism | €57.5M | 350 | 60 |
| 10 | HSE West North West | €56.9M | 341 | 60 |
| 11 | Easca Group | €52.9M | 350 | 60 |
| 12 | Coolsivna Construction Ltd | €52.9M | 350 | 60 |
| 13 | Galmere Fresh Foods | €50.8M | 125 | 60 |
| 14 | University of Galway - J.E. Cairnes School of Business & Economics | €40.1M | 350 | 60 |
| 15 | University of Galway - College of Medicine, Nursing and Health Sciences | €40.1M | 350 | 60 |
| 16 | Mactex Lubricants & Polymers | €39.2M | 125 | 60 |
| 17 | Citylink Ireland | €34.3M | 125 | 60 |
| 18 | Bio-Medical Research Ltd | €30.6M | 125 | 60 |
| 19 | centre for creative technologies @ university of galway | €28.0M | 3,000 | 60 |
| 20 | PAT RYNN ENGINEERING LTD. | €25.0M | 125 | 60 |
| 21 | Bradley Motor Works Ltd. | €24.8M | 125 | 60 |
| 22 | Maveric Contractors Ltd | €24.8M | 125 | 60 |
| 23 | Indica Ireland Ltd. & Branch Slovakia | €23.8M | 125 | 60 |
| 24 | Kinesis Fleet Ireland | €23.8M | 125 | 60 |
| 25 | Quiptech | €23.7M | 125 | 60 |
| 26 | ATU Student Managed Fund | €21.9M | 125 | 60 |
| 27 | SSE Cleaning Ltd | €21.8M | 350 | 60 |
| 28 | CitySwift | €21.3M | 125 | 60 |
| 29 | brampton care and rehabilitation centre | €20.9M | 125 | 60 |
| 30 | Lydon House | €20.5M | 125 | 60 |
| 31 | The Claregalway Hotel | €20.5M | 125 | 60 |
| 32 | Park House Hotel & Restaurant | €20.5M | 125 | 60 |
| 33 | Uniquely | €19.5M | 178 | 60 |
| 34 | Rostek Group | €18.9M | 125 | 60 |
| 35 | Aspect Design to Finish Ltd. | €18.9M | 125 | 60 |
| 36 | Cordil Construction | €18.9M | 125 | 60 |
| 37 | Lackagh Concrete Ltd. | €17.8M | 30 | 60 |
| 38 | Comhairle Cathrach na Gaillimhe / Galway City Council | €15.3M | 152 | 60 |
| 39 | yss security | €14.4M | 125 | 60 |
| 40 | Explorers Education Programme | €14.3M | 125 | 60 |
| 41 | CLS - Complete Laboratory Solutions | €14.1M | 136 | 60 |
| 42 | Affinity Wholesale | €12.4M | 30 | 60 |
| 43 | HOMEworld Galway | €12.2M | 30 | 60 |
| 44 | Marvoy Office Supplies | €12.2M | 30 | 60 |
| 45 | Gift-hampers.ie | €12.2M | 30 | 60 |
| 46 | McCambridge's of Galway | €12.2M | 30 | 60 |
| 47 | Ultimate Office & Interiors | €12.2M | 30 | 60 |
| 48 | Downriver Retail | €12.2M | 30 | 60 |
| 49 | Lynx Transport and Logistics | €12.2M | 30 | 60 |
| 50 | Apps Made Easy by Granite | €11.8M | 125 | 60 |
| 51 | SourceDogg | €11.8M | 125 | 60 |
| 52 | Careerconsulting | €11.5M | 350 | 60 |
| 53 | Nucleus VP Group | €11.1M | 125 | 60 |
| 54 | Future Insurance | €11.0M | 30 | 60 |
| 55 | Clearys Loss Assessors & Insurance Services | €11.0M | 30 | 60 |
| 56 | Megadale Ltd. | €10.8M | 30 | 60 |
| 57 | Robo-Sol | €10.8M | 30 | 60 |
| 58 | Alliance Strategies | €10.7M | 125 | 60 |
| 59 | Glenlo Abbey Hotel & Estate | €8.4M | 51 | 50 |
| 60 | Connacht Tribune Group | €8.3M | 125 | 50 |
| 61 | Property Partners Nationwide | €8.2M | 125 | 50 |
| 62 | GPT Plant & Tool Hire | €7.8M | 125 | 50 |
| 63 | BNI Ireland West | €7.6M | 350 | 50 |
| 64 | European Region of Gastronomy 2018 - Galway, West of Ireland | €7.4M | 30 | 50 |
| 65 | Cappella Inc. | €7.3M | 30 | 50 |
| 66 | Bluedrop Medical | €7.3M | 30 | 50 |
| 67 | Vetex Medical Ltd. | €7.3M | 30 | 50 |
| 68 | Apica Cardiovascular Ltd. | €7.3M | 30 | 50 |
| 69 | Endowave | €7.3M | 30 | 50 |
| 70 | ArraVasc | €7.3M | 30 | 50 |
| 71 | Luminate Medical | €7.3M | 30 | 50 |
| 72 | VERSONO MEDICAL LTD | €7.3M | 30 | 50 |
| 73 | Regan Kitchens & Bedroom Furniture | €7.2M | 30 | 50 |
| 74 | C&L Industrial Ltd | €7.0M | 30 | 50 |
| 75 | Marine Ireland Industry Network (MIIN) | €6.8M | 5 | 50 |
| 76 | Geomara | €6.8M | 5 | 50 |
| 77 | galway kitchen machineries pvt ltd | €6.8M | 30 | 50 |
| 78 | Acorn | €6.3M | 30 | 50 |
| 79 | Murray & Spelman Financial Services Ltd | €6.3M | 30 | 50 |
| 80 | Credit Collection Services | €6.3M | 30 | 50 |
| 81 | Pipit Global | €6.3M | 30 | 50 |
| 82 | Link Financial - Ireland | €6.3M | 30 | 50 |
| 83 | Irish Citylink - Connecting Ireland's major towns and cities | €6.1M | 34 | 50 |
| 84 | Ard Precision Ltd | €6.0M | 30 | 50 |
| 85 | Galway Tool and Mould Ltd (GTM) | €6.0M | 30 | 50 |
| 86 | Monaghan & Sons | €5.9M | 30 | 50 |
| 87 | IRUSE | €5.9M | 30 | 50 |
| 88 | Wind Farm Civils Ltd. | €5.9M | 30 | 50 |
| 89 | OBEX Systems | €5.9M | 30 | 50 |
| 90 | tk cars ltd | €5.7M | 30 | 50 |
| 91 | Martin O'Neill Electrical/Data | €5.7M | 30 | 50 |
| 92 | ACal Technologies Ltd | €5.7M | 30 | 50 |
| 93 | InstaPrint Ltd | €5.5M | 30 | 50 |
| 94 | Castle Print ltd. | €5.5M | 30 | 50 |
| 95 | Big O Taxis Galway | €5.4M | 30 | 50 |
| 96 | TheCurlyBrackets | €5.1M | 30 | 50 |
| 97 | Eirnet Technologies | €5.1M | 30 | 50 |
| 98 | App Design | €5.1M | 30 | 50 |
| 99 | SOOT | €5.1M | 30 | 50 |
| 100 | Encrypta Backup | €5.1M | 30 | 50 |