| ARBOR LANDSCAPERS INC | 350888 | SPENCERVILLE | 20 |
| ARBOR RIDGE SERVICES LLC | 1694800 | KINGSVILLE | 1 |
| ARBOR SENSE TREE SERVICE | 2251078 | BALTIMORE | 1 |
| ARBOR TECH TREE CARE | 3398550 | GRANTSVILLE | 2 |
| ARBOR VALLEY LANDSCAPING CO INC | 862667 | WOODBINE | 14 |
| ARBOR VALLEY TREE SERVICE LLC | 2166923 | BALTIMORE | 1 |
| ARBORCARE TREE EXPERTS & OUTDOOR SERVICES | 1937324 | BEL AIR | 1 |
| ARBORCARE TREE EXPERTS INC | 1057658 | MANCHESTER | 6 |
| ARBORICULTURE & HORTICULTURAL SERVICES INCORPORATED | 4076889 | ANNAPOLIS | 4 |
| ARBORMASTERS INC | 1295197 | OWINGS MILLS | 9 |
| ARBORTECH TREE SERVICES LLC | 3329341 | WESTMINSTER | 2 |
| ARBORTECTURE INC | 1365508 | THURMONT | 4 |
| ARBUTUS REFRIGERATION LLC | 4062706 | HALETHORPE | 2 |
| ARC CONSTRUCTION SERVICES | 470404 | BALTIMORE | 5 |
| ARC FLOOR CO INC | 2902533 | FREDERICK | 1 |
| ARC NORTHERN CHESAPEAKE REGION | 3113586 | ABERDEEN | 13 |
| ARC OF SOUTHERN MARYLAND | 1037326 | PRINCE FREDERICK | 1 |
| ARC OF SOUTHERN MARYLAND CORP | 2643987 | PRINCE FREDERICK | 1 |
| ARC OF WASHINGTON COUNTY INC | 498070 | HAGERSTOWN | 13 |
| ARC SERVICES | 1173523 | MIDDLE RIVER | 4 |
| ARC TRANSPORTATION COMPANY LLC | 4053970 | PARKVILLE | 1 |
| ARCADIO PONCE | 2926230 | FREDERICK | 2 |
| ARCH EXTERIORS LLC | 3964313 | IJAMSVILLE | 0 |
| ARCH MURRAY INC | 2026616 | WESTMINSTER | 1 |
| ARCHEE LLC | 7205356 | FREDERICK | 2 |
| ARCHER CONSTRUCTION CORPORATION | 1357397 | BALDWIN | 1 |
| ARCHER R JONES | 910890 | UNION BRIDGE | 1 |
| ARCHIE C BROWN IV | 1029009 | ANNAPOLIS | 1 |
| ARCHIE G JONES | 463112 | EDEN | 2 |
| ARCHIE L SINCLAIR JR | 1558841 | PRESTON | 1 |
| ARCHILA SOLUTIONS LLC | 9692238 | TAKOMA PARK | 1 |
| ARCHITECTURAL CERAMICS INCORPORATED | 1385537 | ROCKVILLE | 2 |
| ARCHITECTURAL DOOR SUPPLY LLC | 2023627 | FREDERICK | 4 |
| ARCHITECTURAL GARDENS INC | 1238026 | ANNAPOLIS | 1 |
| ARCHITECTURAL GLASS & METAL CONTRACTING INC | 3092960 | CAPITOL HEIGHTS | 2 |
| ARCHITECTURAL LAWN & LANDSCAPE LLC | 4579086 | EDGEWATER | 0 |
| ARCHITECTURAL MATERIALS INC | 1356795 | ABERDEEN | 5 |
| ARCHITECTURAL STONE SERVICES LTD | 509632 | BALTIMORE | 1 |
| ARCHITECTURAL WINDOW SUPPLY INC | 1059228 | ANNAPOLIS | 1 |
| ARCHSCAN LLC | 4476853 | COLUMBIA | 1 |
| ARCO ELECTRIC INC | 3511724 | MOUNT AIRY | 1 |
| ARCOT ROWE | 1531038 | OWINGS MILLS | 1 |
| ARCTIC AIR SOLUTIONS LLC | 2636614 | MANCHESTER | 1 |
| ARCTIC FIREPROOFING INC | 856697 | ELKRIDGE | 2 |
| ARCTIC REFRIGERATION INC | 1131582 | BALTIMORE | 1 |
| ARD TRUCKING LOGISTICS LLC | 4033464 | TAKOMA PARK | 1 |
| ARDEN AIR FREIGHT INC | 227337 | LINTHICUM HEIGHTS | 5 |
| ARDEN TRUCKING INC | 389391 | PARKTON | 6 |
| ARDENT COMPANY LLC | 1765164 | BETHESDA | 20 |
| ARDMORE ENTERPRISES INC | 1029594 | MITCHELLVILLE | 19 |
| ARDO CONTRACTING INCORPORATED | 1676762 | COLUMBIA | 1 |
| ARDON CONCRETE INC | 2374352 | MIDDLE RIVER | 1 |
| ARDON TRUCKING LLC | 4027834 | ANNAPOLIS | 1 |
| AREA CONSTRUCTION INC | 4299319 | ELKTON | 1 |
| AREA TREE COMPANY | 1563054 | MECHANICSVILLE | 2 |
| AREA TRUCK & EQUIPMENT LLC | 4567090 | ELKTON | 5 |
| ARES ENERGY LLC | 3531868 | ODENTON | 1 |
| ARES FARM INC | 1043939 | FEDERALSBURG | 2 |
| ARETHA FOGG | 844571 | UPPER MARLBORO | 2 |
| AREVALO ABARCA LANDSCAPING LLC | 4502545 | GAITHERSBURG | 1 |
| AREVALO RAMOS HOMES LLC | 3502627 | BALTIMORE | 0 |
| AREVALO TOWINGS INC | 1206249 | SILVER SPRING | 3 |
| AREVALO'S CONTRACTING LLC | 3169819 | BELTSVILLE | 2 |
| ARFAN GHANI | 4328916 | FREDERICK | 0 |
| ARGUETA GENERAL CONTRACTOR INC | 1405851 | SILVER SPRING | 1 |
| ARGUETA SIDING & GENERAL CONSTRUCTION LLC | 3826207 | PASADENA | 1 |
| ARGUETA'S TRUCKING LLC | 4213715 | CAMP SPRINGS | 2 |
| ARGYLE LAND COMPANY INC | 3799594 | SILVER SPRING | 1 |
| ARIA INDUSTRIES | 3295624 | HAGERSTOWN | 1 |
| ARIANA TIRES LLC | 3473291 | ESSEX | 1 |
| ARIAS MULTISERVICES LLC | 2974329 | BELTSVILLE | 1 |
| ARIAS SERVICES | 3787674 | JESSUP | 1 |
| ARIAS TRUCKING LLC | 3792086 | SILVER SPRING | 1 |
| ARICA CONSULTING & CONTRACTING | 1369294 | JESSUP | 4 |
| ARIEL ELIAS MEZA GARCIA | 3262051 | LAUREL | 5 |
| ARIEL FIBER OPTICS LLC | 4339419 | GAITHERSBURG | 2 |
| ARIES CONTRACTOR | 2572764 | LANHAM | 1 |
| ARIES CONTRACTORS, LLC | 4832286 | LANHAM | 2 |
| ARIOSA & COMPANY LLC | 4046366 | COCKEYSVILLE | 1 |
| ARIS MCGOWANS | 2389975 | GRASONVILLE | 1 |
| ARISE LIMITED LIABILITY COMPANY | 3608476 | HYATTSVILLE | 1 |
| ARISTIDES R MATUTE | 1809219 | HYATTSVILLE | 1 |
| ARIZAGA'S TRANSPORTATION LIMITED LIABILITY COMPANY | 3204153 | PARKTON | 1 |
| ARK ASSOCIATES LLC | 4493025 | COLUMBIA | 1 |
| ARK AUTO LOGISTICS LIMITED LIABILITY COMPANY | 4533233 | GERMANTOWN | 0 |
| ARK MACHINERY MOVERS INC | 649948 | EDGEWOOD | 2 |
| ARK OF PROTECTION LLC | 3910570 | BOWIE | 1 |
| ARK SIGN SERVICES INC | 1107136 | HYATTSVILLE | 5 |
| ARK SYSTEMS INC | 1652457 | COLUMBIA | 1 |
| ARK TRANSPORTATION LLC | 2418065 | GLEN BURNIE | 1 |
| ARK TRUCKING | 1039008 | GLEN BURNIE | 1 |
| ARK TRUCKING | 3375389 | GLEN BURNIE | 1 |
| ARKAR CONSTRUCTION INC | 1046467 | DAYTON | 2 |
| ARKCAN LLC | 4099232 | WESTMINSTER | 1 |
| ARKKON CONSTRUCTION LLC | 4346933 | HYATTSVILLE | 1 |
| ARKON CONSTRUCTION LLC | 4473081 | CLINTON | 1 |
| ARLINGTON MOVERS INC | 4278118 | ROCKVILLE | 0 |
| ARLO RENOVATIONS LLC | 3799638 | BOONSBORO | 1 |
| ARM TRUCKING AND LOGISTICS LLC | 3383946 | OWINGS MILLS | 4 |
| ARMAAN ENTERPRISES INC | 2632917 | CAMP SPRINGS | 1 |