| Lynco Assoc INC | 879847 | 19 | 19 | Intrastate |
| Calvert Well Drilling CO | 1336757 | 18 | 25 | Intrastate |
| Mulford Construction Company | 1640454 | 15 | 12 | Interstate |
| Honey Cove Landscaping & Tree Service | 2180198 | 15 | 15 | Intrastate |
| Beltway Iron CO INC | 1079939 | 12 | 12 | Interstate |
| Thomas L Hance INC | 1018350 | 9 | 6 | Intrastate |
| The Gott Company | 313308 | 8 | 10 | InterstateHazmat |
| 1965 | 1339698 | 8 | 8 | Intrastate |
| Outback Porta Jon Incorporation | 856700 | 7 | 4 | Intrastate |
| Quality Built Homes INC | 1024940 | 7 | 24 | InterstateHazmat |
| Super Salvage | 1464377 | 7 | 4 | Interstate |
| Martinez Landscapers INC | 1615768 | 7 | 3 | Intrastate |
| Cpf Underground Utilities INC | 329616 | 6 | 2 | InterstateHazmat |
| Frederick Hand Paving Contractor | 1040291 | 4 | 3 | Intrastate |
| Jim's Tool & Party Rental | 2337330 | 4 | 4 | Interstate |
| Greenshoe Lawnscaping | 2369845 | 4 | 2 | Intrastate |
| Cpf Underground Utilities LLC | 3109040 | 4 | 2 | Interstate |
| R&r Fabrication Enterprises LLC | 4271212 | 4 | 3 | Interstate |
| Met Steel LLC | 4311309 | 4 | 4 | Intrastate |
| Daryn Willson | 7342770 | 4 | 1 | Intrastate |
| Rawlings Towing | 1157953 | 3 | 2 | IntrastateHazmat |
| Leitch Heating & Ac INC | 1292012 | 3 | 3 | Intrastate |
| G H Hastings Excavating INC | 1484368 | 3 | 1 | Intrastate |
| W B Plbg Systems | 1504724 | 3 | 2 | Intrastate |
| S F Jones Heating And Cooling | 2821172 | 3 | 3 | Intrastate |
| Southern Maryland Moving Company LLC | 4031000 | 3 | 2 | Interstate |
| Spek Home Inspections | 4459806 | 3 | 4 | Intrastate |
| Cc's Industries LLC | 4534466 | 3 | 6 | Intrastate |
| Ccs Industries LLC | 6270754 | 3 | 4 | Intrastate |
| Mac & Sons Lawn And Handyman Services LLC | 9542146 | 3 | 2 | Intrastate |
| Jrs Construction Company INC | 712099 | 2 | 2 | Interstate |
| Cardinal Creek Plant Farm INC | 806953 | 2 | 2 | Interstate |
| Smart Ride INC | 880431 | 2 | 11 | Interstate |
| Professional Asphalt Service INC | 1052249 | 2 | 4 | Intrastate |
| Annie Virginia Halterman | 1059562 | 2 | 2 | Intrastate |
| Hammett's Building Services | 1133479 | 2 | 1 | Intrastate |
| Marrick Homes | 1153149 | 2 | 6 | Intrastate |
| George Morris Concrete INC | 1275006 | 2 | 1 | Intrastate |
| Wright's Petroleum | 1331935 | 2 | 2 | Intrastate |
| Jims Air Tool And Equip Of Calvert INC | 1398770 | 2 | 4 | Intrastate |
| Dominion Carpentry INC | 1466770 | 2 | 2 | Intrastate |
| Battle Creek Landscaping & Excavation LLC | 1477278 | 2 | 1 | Intrastate |
| Smd Paving LLC | 1493590 | 2 | 2 | Intrastate |
| Big Boys Trash Service INC | 1514277 | 2 | 1 | Intrastate |
| A & G Construction INC | 1626957 | 2 | 3 | Intrastate |
| Entertainment Avenue LLC | 1959128 | 2 | 8 | Interstate |
| A&m Construction | 2366262 | 2 | 2 | Intrastate |
| Gh Clark Contractors INC | 2396705 | 2 | 1 | Intrastate |
| Clean Safe Technologies INC | 2452259 | 2 | 2 | InterstateHazmat |
| Jt General Maintenance LLC | 2463900 | 2 | 4 | IntrastateHazmat |
| 231 Farm Center | 2518230 | 2 | 2 | Intrastate |
| Green By Nature Lawn And Landscaping Services Corporation | 2931536 | 2 | 2 | Intrastate |
| Faith & Fumes | 3731915 | 2 | 2 | Interstate |
| Metropolitan Controls INC | 3757736 | 2 | 3 | InterstateHazmat |
| Riverside Heating And Air Conditioning INC | 4233914 | 2 | 12 | Intrastate |
| City Wide Mechanical LLC | 4247625 | 2 | 5 | Interstate |
| Southern Maryland Driving Academy | 4790070 | 2 | 2 | Intrastate |
| Green By Nature LLC | 9383581 | 2 | 2 | Intrastate |
| Charles F Weber CO INC | 7003 | 1 | 2 | Intrastate |
| Carco Trucking INC | 514550 | 1 | 1 | Intrastate |
| Cozzens Construction CO INC | 536261 | 1 | 1 | Interstate |
| J D L Trucking | 944473 | 1 | 1 | Interstate |
| Thomas L Hance III | 1015138 | 1 | 1 | Intrastate |
| Adult Day Care Of Calvert County | 1030018 | 1 | 2 | Intrastate |
| Lusby Motor CO INC | 1036034 | 1 | 2 | Intrastate |
| Island Creek Farm | 1036425 | 1 | 1 | Intrastate |
| Arc Of Southern Maryland | 1037326 | 1 | 1 | Intrastate |
| New Macket Auto Brokers | 1293033 | 1 | 1 | Interstate |
| Gregory Brittain | 1301931 | 1 | 2 | Intrastate |
| Ray's Crab Shack | 1396273 | 1 | 3 | Intrastate |
| Winegarnder Gmc Of Prince Frederick | 1424573 | 1 | 1 | InterstateHazmat |
| Harris Trucking | 1434434 | 1 | 2 | Intrastate |
| Riggs Concrete & Septic | 1456223 | 1 | 1 | Intrastate |
| Recorded Books LLC | 1469507 | 1 | 3 | Intrastate |
| Gordon' S Lawn Service | 1472540 | 1 | 1 | Intrastate |
| Sears Authorized Dealer Store | 1474374 | 1 | 1 | Intrastate |
| G C Rymer Construction INC | 1476028 | 1 | 3 | Intrastate |
| Sure Air INC | 1476507 | 1 | 4 | Intrastate |
| Dock Collins | 1478022 | 1 | 1 | Intrastate |
| Gilbert's Carpentry | 1525033 | 1 | 2 | Intrastate |
| Not For Business John | 1539251 | 1 | 1 | Intrastate |
| Calvert Body Works INC | 1554410 | 1 | 2 | IntrastateHazmat |
| Material Systems INC | 1570749 | 1 | 1 | Intrastate |
| A-Frame Construction Excavation | 1578855 | 1 | 1 | Intrastate |
| C Turner Construction INC | 1591681 | 1 | 1 | Intrastate |
| C & D Equipment INC | 1779282 | 1 | 1 | Interstate |
| William D Beveridge | 1841825 | 1 | 1 | Intrastate |
| Jennifer Endres | 2074407 | 1 | 2 | Interstate |
| Barstow Trucking LLC | 2333087 | 1 | 1 | Interstate |
| All American Refuse & Recycling | 2462198 | 1 | 1 | Intrastate |
| Mobile Mechanic Service LLC | 2492290 | 1 | 1 | Intrastate |
| Murphy And Sons Trucking LLC | 2506722 | 1 | 1 | Intrastate |
| T Thayer Services LLC | 2539830 | 1 | 1 | Interstate |
| Calvert Crabs LLC | 2574682 | 1 | 2 | Intrastate |
| Arc Of Southern Maryland | 2643987 | 1 | 4 | Intrastate |
| Tow Ladies Of America INC | 2793194 | 1 | 1 | IntrastateHazmat |
| Hand Paving | 2817059 | 1 | 4 | Intrastate |
| Bayside Environmental Services INC | 2947998 | 1 | 1 | Intrastate |
| North American Deck & Patio Experts LLC | 3049100 | 1 | 1 | Intrastate |
| John Young | 3292809 | 1 | 2 | IntrastateHazmat |