| Thompsongas LLC | 2812287 | 1,210 | 787 | InterstateHazmat |
| Landcare | 867467 | 940 | 952 | Interstate |
| Mint Express INC | 2779557 | 120 | 60 | Interstate |
| Ricetire | 343695 | 97 | 97 | Interstate |
| Dairy Maid Dairy LLC | 84250 | 87 | 87 | Interstate |
| Mattress Warehouse LLC | 553575 | 60 | 61 | Interstate |
| Connelly And Associates INC | 451421 | 58 | 90 | Interstate |
| Ausherman Homes | 458205 | 53 | 43 | Intrastate |
| Richard B Rudy INC | 94574 | 47 | 47 | Interstate |
| North Star Foundation INC | 880482 | 46 | 32 | Interstate |
| Sustainable Energy Systems LLC | 2822073 | 42 | 52 | Interstate |
| Pleasants Paving | 2502101 | 37 | 42 | InterstateHazmat |
| Foodpro Corp | 337530 | 36 | 39 | Interstate |
| Rbg Spirits And Wine Of Maryland | 1588104 | 34 | 21 | Intrastate |
| Southern States Frederick Coop | 908135 | 29 | 26 | InterstateHazmat |
| On The Town Limousines INC | 1273192 | 29 | 31 | Interstate |
| Carey And Huntington Limousine | 584030 | 28 | 31 | Interstate |
| East Side Ag Transport INC | 340402 | 26 | 13 | Interstate |
| Vinny's Towing & Recovery LLC | 1561159 | 25 | 15 | InterstateHazmat |
| Ecology Services Refuse & Recycling LLC | 1781944 | 25 | 22 | Intrastate |
| H Frank Foland & Son INC | 816014 | 22 | 21 | Interstate |
| Farmers Coop Association INC | 256319 | 20 | 10 | InterstateHazmat |
| C H S INC | 902863 | 20 | 20 | InterstateHazmat |
| Bay Brothers Gc | 8624166 | 20 | 40 | Intrastate |
| Pjs Roofing INC | 1509716 | 19 | 50 | Intrastate |
| Fortress Foundation Solutions LLC | 4285774 | 19 | 21 | Intrastate |
| Frederick Fence CO INC | 440903 | 18 | 19 | Intrastate |
| Hopwood Enterprises INC | 1004705 | 18 | 24 | Interstate |
| Ads Services INC | 575691 | 17 | 8 | Intrastate |
| Gutters For Less | 1080661 | 17 | 10 | Interstate |
| Triangle Contracting LLC | 2373568 | 17 | 11 | InterstateHazmat |
| Music & Arts | 482070 | 16 | 12 | Interstate |
| Marks Equipment Service INC | 840678 | 16 | 15 | InterstateHazmat |
| Pgc Landscape | 866106 | 16 | 15 | Interstate |
| Glass Concepts INC | 1716426 | 16 | 6 | Interstate |
| Great Eastern Concrete INC | 360833 | 15 | 16 | Interstate |
| Service Master | 1022130 | 15 | 20 | Interstate |
| Shoemaker Bros INC | 1038745 | 15 | 13 | Intrastate |
| Landscape Services INC | 3085864 | 14 | 13 | InterstateHazmat |
| Top US Auto | 3820037 | 14 | 17 | InterstateHazmat |
| Adelphia Communications | 1027675 | 13 | 10 | Intrastate |
| Topper Construction Company | 1353238 | 13 | 10 | InterstateHazmat |
| Chapingo Tree Care Specialists | 1689544 | 13 | 12 | Interstate |
| Clym | 756821 | 12 | 11 | InterstateHazmat |
| Frederick Concrete | 1173875 | 12 | 8 | Interstate |
| Service Glass Industries INC | 1284410 | 12 | 11 | Interstate |
| Howell Brother Lawn & Landscaping LLC | 1492123 | 12 | 10 | Intrastate |
| Comcast | 1646841 | 12 | 12 | Interstate |
| Dunkin Donuts | 2511587 | 12 | 20 | Interstate |
| Island Vybz Trucking LLC | 3703670 | 12 | 8 | Intrastate |
| US Transportation LLC | 3767493 | 12 | 22 | Interstate |
| Poole Landscaping INC | 459992 | 11 | 14 | Intrastate |
| Wells Cove LLC | 917620 | 11 | 11 | Interstate |
| Worldshine Cloverleaf LLC | 3956252 | 11 | 7 | Intrastate |
| Got Utilities LLC | 3986293 | 11 | 6 | Interstate |
| Stups Auto Center | 8256250 | 11 | 8 | InterstateHazmat |
| Builders Design LLC | 376076 | 10 | 9 | Interstate |
| Hmf Paving Contractors INC | 1019409 | 10 | 1 | Intrastate |
| J&m Truck Repair INC | 1063127 | 10 | 7 | InterstateHazmat |
| Showtime Sound Trucking LLC | 1506062 | 10 | 12 | Interstate |
| Wlr Automotive Group INC | 2397958 | 10 | 8 | InterstateHazmat |
| Horizon Logistics LLC | 6654982 | 10 | 10 | Interstate |
| Wright Away Refuse INC | 1032395 | 9 | 6 | Intrastate |
| Custom Glass Services | 1270445 | 9 | 1 | Interstate |
| D & A Logistics INC | 1526292 | 9 | 10 | Interstate |
| Winpigler Rcs LLC | 2412575 | 9 | 10 | Intrastate |
| Frederick Brick Works INC | 427035 | 8 | 7 | Interstate |
| Ramar Moving Systems INC | 441070 | 8 | 8 | Interstate |
| Keyser-Garver Well Drilling INC | 462233 | 8 | 5 | Intrastate |
| Colonial Sash And Door INC | 542111 | 8 | 8 | Interstate |
| Brandenburg Electric INC | 799229 | 8 | 9 | InterstateHazmat |
| Earth Movers Excavating INC | 917485 | 8 | 9 | Interstate |
| Daybreak Adult Day Services INC | 1029812 | 8 | 7 | Intrastate |
| Cline And Duvall INC | 1033379 | 8 | 3 | Intrastate |
| Ramar Transportation & Logistics Group | 1131819 | 8 | 5 | Interstate |
| Professional Landscape Management Services INC | 1266666 | 8 | 5 | Interstate |
| Buhrstone Brick INC | 1311854 | 8 | 6 | Interstate |
| Joseph F Devilbiss Construction Company | 1356587 | 8 | 7 | Intrastate |
| Ojeda Brothers Landscaping LLC | 1973738 | 8 | 8 | Intrastate |
| Atlas Home Energy Solutions LLC | 2498094 | 8 | 8 | Intrastate |
| Dorseys Towing And Parking Enforcement LLC | 3746640 | 8 | 3 | InterstateHazmat |
| Keller Brothers INC | 428844 | 7 | 5 | Interstate |
| Warner Mechanical - Warner Construction - Kaempf And Harris Custom Sheetmetal | 565318 | 7 | 9 | InterstateHazmat |
| All-Shred INC | 816786 | 7 | 9 | Interstate |
| Triple 777 Sanitation INC | 1305605 | 7 | 7 | Intrastate |
| Oldetowne Historic Landscape | 1711185 | 7 | 5 | InterstateHazmat |
| Colonial Equipment Company | 1820255 | 7 | 13 | Interstate |
| Way Station Incorporated | 2101236 | 7 | 45 | Intrastate |
| Eza Construction Corp | 2276377 | 7 | 5 | Interstate |
| E Brown Transportation LLC | 2350582 | 7 | 7 | Interstate |
| Keyser Services LLC | 2516325 | 7 | 7 | Intrastate |
| Graceful Transitions Moving | 2637395 | 7 | 9 | Interstate |
| Fout Crane And Rigging LLC | 3379197 | 7 | 2 | Interstate |
| Design Innovations LLC | 3453941 | 7 | 2 | Intrastate |
| H & H Services LLC | 3940266 | 7 | 7 | Interstate |
| T Cassidy Trucking LLC | 4229009 | 7 | 1 | Interstate |
| James Avery Clark | 184111 | 6 | 4 | Intrastate |
| Dorsey's Towing & Parking Enforcement | 354357 | 6 | 10 | Interstate |
| Global Equipment Excavating & Contracting | 365227 | 6 | 2 | Interstate |
| Jhg Contractors INC | 513011 | 6 | 1 | IntrastateHazmat |