| 1 | rg company | €563.4M | 20,000 | 70 | B |
| 2 | macdermid industrial solutions north america | €490.7M | 3,000 | 70 | B |
| 3 | macdermid, alpha, and enthone business group 1 | €490.7M | 3,000 | 70 | B |
| 4 | Mercury Fuel Service | €109.7M | 350 | 70 | B |
| 5 | H&T Waterbury, Inc. | €93.2M | 350 | 60 | C+ |
| 6 | AMETEK Haydon Kerk Pittman Motion Solutions | €66.5M | 350 | 60 | C+ |
| 7 | City of Waterbury-Mayor's Office | €55.7M | 554 | 60 | C+ |
| 8 | LOEHMANN-BLASIUS CHEVROLET, INC | €51.0M | 125 | 60 | C+ |
| 9 | D&M Packing, LLC | €50.8M | 125 | 60 | C+ |
| 10 | HireAbility Vermont | €35.2M | 350 | 60 | C+ |
| 11 | ametek haydon kerk motion solutions, inc. | €34.2M | 350 | 60 | C+ |
| 12 | LUVATA WATERBURY, INC | €33.3M | 125 | 60 | C+ |
| 13 | The Platt Brothers & Company | €33.3M | 125 | 60 | C+ |
| 14 | Forum Plastics | €28.6M | 125 | 60 | C+ |
| 15 | Eemax, Inc. (a Rheem Company) | €27.4M | 125 | 60 | C+ |
| 16 | Gem Precision Manufacturing | €27.4M | 125 | 60 | C+ |
| 17 | EcoSmart Tankless Electric Water Heaters | €27.4M | 125 | 60 | C+ |
| 18 | Webster Investments | €26.3M | 125 | 60 | C+ |
| 19 | NATIONAL INTEGRATED INDUSTRIES | €23.7M | 125 | 60 | C+ |
| 20 | North East Transportation Company | €22.5M | 125 | 60 | C+ |
| 21 | Haestad Methods Inc. | €21.3M | 125 | 60 | C+ |
| 22 | community options residential services | €20.9M | 125 | 60 | C+ |
| 23 | Central Naugatuck Valley HELP, Inc. | €20.9M | 125 | 60 | C+ |
| 24 | Schulze Manufacturing | €20.7M | 125 | 60 | C+ |
| 25 | Courtyard by Marriott Waterbury | €20.5M | 125 | 60 | C+ |
| 26 | MJ Daly, LLC | €18.9M | 125 | 60 | C+ |
| 27 | JP Maguire Property Damage Cleanup and Reconstruction | €18.9M | 125 | 60 | C+ |
| 28 | seidel group usa | €17.0M | 125 | 60 | C+ |
| 29 | Northwest Public Safety Communications Center Inc. | €12.6M | 125 | 60 | C+ |
| 30 | Quench Cafe LLC | €12.4M | 30 | 60 | C+ |
| 31 | Lingerie & Adult Party Supply Shop | €12.2M | 30 | 60 | C+ |
| 32 | Riccardi Auto Service | €12.2M | 30 | 60 | C+ |
| 33 | PORTMEIRION GROUP USA, INC | €12.2M | 30 | 60 | C+ |
| 34 | Colonial Wines & Spirits | €12.2M | 30 | 60 | C+ |
| 35 | Better Bedding | €12.2M | 30 | 60 | C+ |
| 36 | Blakes School Uniform | €12.2M | 30 | 60 | C+ |
| 37 | EZGOAL | €12.2M | 30 | 60 | C+ |
| 38 | THE WAREHOUSE STORE FIXTURE CO | €12.2M | 30 | 60 | C+ |
| 39 | Le Petit Gourmet Catering | €12.2M | 30 | 60 | C+ |
| 40 | hardcore sweet cupcakes | €12.2M | 30 | 60 | C+ |
| 41 | wonder bread outlet | €12.2M | 30 | 60 | C+ |
| 42 | mercury fuel services, inc | €11.6M | 125 | 60 | C+ |
| 43 | CDR INSURANCE GROUP, INC | €11.0M | 30 | 60 | C+ |
| 44 | Clifford Insurance | €11.0M | 30 | 60 | C+ |
| 45 | MGM Insurance | €11.0M | 30 | 60 | C+ |
| 46 | Northern Reliability | €9.4M | 30 | 50 | C |
| 47 | Allure Enterprises LLC | €8.5M | 30 | 50 | C |
| 48 | Axela Group | €8.2M | 125 | 50 | C |
| 49 | schmidts & serafines, inc | €7.8M | 30 | 50 | C |
| 50 | talkradiox | €7.5M | 30 | 50 | C |
| 51 | Freihofers Bakery Outlet | €7.4M | 30 | 50 | C |
| 52 | Myanmar Ayar Win | €7.4M | 30 | 50 | C |
| 53 | HOB Industries Incorporated | €7.0M | 30 | 50 | C |
| 54 | Waterbury Screw Machine Products Co. | €7.0M | 30 | 50 | C |
| 55 | T Sendzimir Inc | €7.0M | 30 | 50 | C |
| 56 | E&J PARTS CLEANING INC | €7.0M | 30 | 50 | C |
| 57 | J.L. Lucas Machinery | €7.0M | 30 | 50 | C |
| 58 | Somma Tool Co | €7.0M | 30 | 50 | C |
| 59 | BCCS Brass City Charter School | €6.9M | 125 | 50 | C |
| 60 | j l lucas machinery inc | €6.8M | 30 | 50 | C |
| 61 | Cedar Lane Rehabilitation Ctr | €6.7M | 125 | 50 | C |
| 62 | Cheshire House Health Care | €6.7M | 125 | 50 | C |
| 63 | perfection screw & rivet mfg. co. | €6.6M | 30 | 50 | C |
| 64 | Merchant ICS | €6.3M | 30 | 50 | C |
| 65 | Airtel Communication | €6.3M | 30 | 50 | C |
| 66 | Lux Financial | €6.3M | 30 | 50 | C |
| 67 | Soccer Extreme Inc | €6.3M | 30 | 50 | C |
| 68 | IMTI - Industrial Management & Training Institute | €6.0M | 30 | 50 | C |
| 69 | Hancock Engineering Inc | €5.9M | 30 | 50 | C |
| 70 | EFC/Wesco | €5.7M | 30 | 50 | C |
| 71 | Itw Highland Mfg Co | €5.7M | 30 | 50 | C |
| 72 | Tri Tec Electronics Inc | €5.7M | 30 | 50 | C |
| 73 | ami’s crispy bagels & deli | €5.1M | 125 | 50 | C |
| 74 | Lane Financial | €5.1M | 30 | 50 | C |
| 75 | Novatek Information Systems | €5.1M | 30 | 50 | C |
| 76 | waterbury inn, waterpark and convention center inc | €5.1M | 125 | 50 | C |
| 77 | davita waterbury heights dialysis center 2345 | €5.0M | 30 | 50 | C |
| 78 | amazing dance and fitness | €5.0M | 30 | 50 | C |
| 79 | shadow ops paintball | €5.0M | 30 | 50 | C |
| 80 | dr patel’s dental center | €5.0M | 30 | 50 | C |
| 81 | dr. philip a. mongelluzzo jr | €5.0M | 30 | 50 | C |
| 82 | Healthy Minds Alliance | €5.0M | 30 | 50 | C |
| 83 | ionut anton m.d. pc | €5.0M | 30 | 50 | C |
| 84 | Restaurant City - Restaurant Equipment Superstores | €5.0M | 30 | 50 | C |
| 85 | AMERICAN COPY SERVICE CENTER, A Visual Edge Technology Company | €5.0M | 30 | 50 | C |
| 86 | Riders Cafe | €4.9M | 30 | 50 | C |
| 87 | golden voice voiceover services | €4.9M | 30 | 50 | C |
| 88 | alva interiors, inc | €4.5M | 30 | 50 | C |
| 89 | Sarracco Mechanical Svc Inc | €4.5M | 30 | 50 | C |
| 90 | ServiceMaster Albino | €4.5M | 30 | 50 | C |
| 91 | Local 420 | €4.5M | 30 | 50 | C |
| 92 | bart lorusso & sons, inc | €4.5M | 30 | 50 | C |
| 93 | Kar Construction | €4.5M | 30 | 50 | C |
| 94 | diamond roofing, inc.the best service | €4.5M | 30 | 50 | C |
| 95 | waterbury's best drywall repair | €4.5M | 30 | 50 | C |
| 96 | Heritage Systems, Inc | €4.5M | 30 | 50 | C |
| 97 | simon operation svc | €3.8M | 30 | 50 | C |
| 98 | Eyelets For Industry Inc | €3.8M | 30 | 50 | C |
| 99 | TBW Precision Machine Components | €3.7M | 30 | 50 | C |
| 100 | DURCO MANUFACTURING COMPANY IN | €3.5M | 30 | 50 | C |