| ATLANTIC CONSTRUCTION SERVICE | 1439084 | CROWNSVILLE | 1 |
| ATLANTIC CONTRACTING & MATERIAL CO | 387995 | UPPER MARLBORO | 20 |
| ATLANTIC DELIVERY SERVICES | 2784547 | GLEN BURNIE | 1 |
| ATLANTIC ENTERPRISE LLC | 2335552 | PARKVILLE | 2 |
| ATLANTIC ENVIRONMENTAL SOLUTIONS LLC | 2121659 | BALTIMORE | 2 |
| ATLANTIC FABRICATORS LLC | 2434695 | ELKTON | 3 |
| ATLANTIC FENCE & SUPPLY CO INC | 1125595 | HANOVER | 1 |
| ATLANTIC FOREST PRODUCTS LLC | 1304988 | EDGEMERE | 2 |
| ATLANTIC GENERAL CONTRACTORS INC | 1184815 | BELTSVILLE | 6 |
| ATLANTIC GRADALL RENTAL INC | 3045345 | WILLARDS | 2 |
| ATLANTIC GRAPHIC SYSTEMS INC | 4415444 | COLUMBIA | 1 |
| ATLANTIC HARDWARE SUPPLY LLC | 2274851 | WALDORF | 10 |
| ATLANTIC IMPRINTS INC | 2376633 | BALTIMORE | 1 |
| ATLANTIC INDUSTRIAL MECHANICAL & ELECTRICAL INC | 1732747 | BALTIMORE | 19 |
| ATLANTIC LAWN & LANDSCAPING | 3326072 | ODENTON | 2 |
| ATLANTIC LEASING LLC | 1850455 | ELKRIDGE | 1 |
| ATLANTIC LIGHTING & IRRIGATION INC | 655678 | GAMBRILLS | 19 |
| ATLANTIC LIGHTING & SIGN MAINTENANCE | 633983 | SALISBURY | 1 |
| ATLANTIC MACHINERY INC | 2165146 | SILVER SPRING | 5 |
| ATLANTIC MAINTENANCE GROUP LLC | 2153547 | BROOKLYN PARK | 92 |
| ATLANTIC MARITIME SHIP SUPPLY LLC | 1781407 | ROSEDALE | 2 |
| ATLANTIC MOVING SYSTEMS INC | 543911 | BISHOPVILLE | 2 |
| ATLANTIC NATIONWIDE TRANSPORT INC | 2459901 | BALTIMORE | 0 |
| ATLANTIC NATIONWIDE TRANSPORT INC | 1919121 | BALTIMORE | 1 |
| ATLANTIC NATIONWIDE TRUCKING INC | 582826 | SPARROWS POINT | 46 |
| ATLANTIC OUTDOOR LLC | 3597371 | WESTMINSTER | 1 |
| ATLANTIC PAVING | 1486225 | BELTSVILLE | 2 |
| ATLANTIC POOLS & SPAS INC | 4360861 | BERLIN | 0 |
| ATLANTIC POOLS INC | 1223667 | WOODBINE | 14 |
| ATLANTIC POWER AND LIGHT CO INC | 2193499 | BALTIMORE | 5 |
| ATLANTIC PRIME SOLUTIONS LLC | 5179296 | GAITHERSBURG | 1 |
| ATLANTIC REFINISHING & RESTORATION INC | 1190911 | BELTSVILLE | 4 |
| ATLANTIC STONEWALL AND PATIO INC | 1620183 | OCEAN PINES | 2 |
| ATLANTIC STORMWATER LLC | 2874096 | PARKTON | 4 |
| ATLANTIC SUPERMARKET | 1334922 | HYATTSVILLE | 2 |
| ATLANTIC TENT RENTALS | 3179941 | WALKERSVILLE | 1 |
| ATLANTIC TOOL LLC | 3018620 | BERLIN | 1 |
| ATLANTIC TOWING AND RECOVERY INC | 3700778 | BLADENSBURG | 3 |
| ATLANTIC TOWING AND RECOVERY LLC | 3669283 | BERLIN | 1 |
| ATLANTIC TRACTOR LLC | 173187 | SALISBURY | 120 |
| ATLANTIC TRAFFIC SAFETY INC | 2173235 | BERLIN | 9 |
| ATLANTIC TRANSPORT LLC | 4285913 | ELKRIDGE | 1 |
| ATLANTIC TRANSPORTATION SERVICES INC | 282129 | ROSEDALE | 0 |
| ATLANTIC UNITY LLC | 4881086 | REISTERSTOWN | 1 |
| ATLANTIC WASTEWATER SOLUTIONS LLC | 2567893 | GAMBRILLS | 2 |
| ATLANTIDA BUILDERS INC | 3483050 | GAITHERSBURG | 1 |
| ATLANTIS DELIVERY SERVICE LLC | 4095903 | GAITHERSBURG | 0 |
| ATLANTIS ENVIRONMENTAL AND WATER TREATMENT SOLUTIONS LLC | 4577301 | CLINTON | 1 |
| ATLAS BUILD SOLUTIONS INC | 4479207 | MOUNT AIRY | 2 |
| ATLAS CONCRETE PAVING ASPHALT CORPORATION | 1264909 | NOTTINGHAM | 1 |
| ATLAS CONCRETE SERVICES INC | 1557837 | LEONARDTOWN | 5 |
| ATLAS CONTAINER CORP | 247525 | SEVERN | 16 |
| ATLAS ELECTRIC SERVICE HEATING & COOLING INC | 1918079 | RHODESDALE | 1 |
| ATLAS FOUNDATIONS OF WASHINGTON LLC | 728197 | CAPITOL HGTS | 2 |
| ATLAS FREIGHT LLC | 4548836 | HAGERSTOWN | 1 |
| ATLAS HOME ENERGY SOLUTIONS LLC | 2498094 | FREDERICK | 8 |
| ATLAS MARBLE & TILE INC | 792183 | ARNOLD | 1 |
| ATLAS REALTY INC | 2724441 | SILVER SPRING | 1 |
| ATLAS SERVICE CENTER | 3210643 | GAITHERSBURG | 1 |
| ATLAS SERVICE CENTER AND CARPET AND VACUUM EXPO | 1772540 | GAITHERSBURG | 1 |
| ATLAS SERVICES LLC | 931740 | LAUREL | 1 |
| ATLAS TRANSPORT INC | 6680320 | MONTGOMERY VILLAGE | 2 |
| ATLAS TRUCKING | 1405594 | WALDORF | 1 |
| ATLAS TRUCKING LLC | 3884065 | BRANDYWINE | 1 |
| ATLAS WERKS INC | 2326247 | JARRETTSVILLE | 1 |
| ATLAW TOWING | 3044660 | SILVER SPRING | 1 |
| ATNOD COMPANY LLC | 4398916 | LANHAM | 1 |
| ATR TOWING LLC | 3571498 | UPPR MARLBORO | 1 |
| ATS EXPRESS INC | 2495069 | FREDERICK | 2 |
| ATS POOL CONSTRUCTION & SERVICE | 502712 | ROCKVILLE | 7 |
| ATT LLC | 2461931 | SILVER SPRING | 3 |
| ATTIC SWEEPERS HAULING | 2953276 | ROSEDALE | 2 |
| ATTRONICA COMPUTERS INC | 841630 | GAITHERSBURG | 7 |
| ATW AUTO TRANSPORT LLC | 4525010 | HAGERSTOWN | 1 |
| ATW LOGISTICS INC | 3366388 | UPPR MARLBORO | 1 |
| ATW LOGISTICS LANDSCAPING | 3476048 | OWINGS MILLS | 1 |
| ATW TRUCKING LLC | 3731499 | BALTIMORE | 1 |
| ATWATER DRILLING | 1080612 | DAVIDSONVILLE | 8 |
| ATWELL TRUCKING LLC | 1230817 | JEFFERSON | 1 |
| AU CONTRACTORS | 3346110 | PARKVILLE | 1 |
| AU-TOW TOWING INC | 590649 | BELTSVILLE | 1 |
| AUBREY F MATTINGLY | 1333543 | LEONARDTOWN | 5 |
| AUBREY LAMBERT | 2410315 | SILVER SPRING | 1 |
| AUBURN GERALD BROADIE SR | 1989104 | SALISBURY | 1 |
| AUBURN TOWING INC | 560074 | ROCKVILLE | 3 |
| AUBYN HUAL LLC | 3463228 | ESSEX | 1 |
| AUDINO ERNESTO SANDOVAL | 1669344 | FINKSBURG | 1 |
| AUDIO ASSURANCE LLC | 4087651 | CLINTON | 2 |
| AUDIO VIDEO INTEGRATION LLC | 4379116 | STREET | 1 |
| AUDIO-VIDEO GROUP, LLC | 4588980 | FREDERICK | 1 |
| AUDREY-TIPTON TOWING | 1531647 | WHITEFORD | 1 |
| AUER ELECTRIC INC | 1684721 | BALTIMORE | 1 |
| AUGSBURG LUTHERAN HOME OF MARYLAND INC | 1036432 | BALTIMORE | 0 |
| AUGUST H ECKES | 1041955 | BALTIMORE | 2 |
| AUGUST K TOMAK | 1085755 | BALTIMORE | 4 |
| AUGUSTA LIFE SCIENCES US OPCO I LLC | 4527393 | SPARKS GLENCOE | 4 |
| AUGUSTIN G PROCTOR | 1025030 | LAUREL | 2 |
| AUI INC | 2021768 | ELKTON | 202 |
| AUNDRAE LINDSEY | 2432016 | BALTIMORE | 1 |
| AUNG TRUCKING | 4017512 | HAGERSTOWN | 1 |