| Washington Suburban Sanitary Commission | 1238066 | 400 | 600 | Intrastate |
| Coastal Sunbelt Produce LLC | 463498 | 215 | 186 | Interstate |
| Allied Environmental Services | 1064198 | 127 | 119 | Interstate |
| Unity Disposal & Recycling LLC | 672770 | 118 | 118 | Intrastate |
| Avs Mobility INC | 2569489 | 80 | 20 | Intrastate |
| Blanchet Concrete Pumping LLC | 3637189 | 65 | 70 | Interstate |
| 9055 Maier Rd Ste A Laurel Md 20723 | 3331880 | 63 | 32 | Intrastate |
| Bray & Scarff | 521920 | 55 | 52 | Interstate |
| Johns Hopkins University Applied Physics Laboratory | 357362 | 43 | 34 | InterstateHazmat |
| Security Vault Works Incorporated | 504240 | 37 | 37 | Interstate |
| Select Event Group INC | 436390 | 36 | 48 | Interstate |
| Patuxent Roofing And Contracting LLC | 2898865 | 35 | 20 | InterstateHazmat |
| Aireco | 433481 | 27 | 28 | InterstateHazmat |
| Rio Grande Food Product INC | 476735 | 26 | 26 | Interstate |
| East Coast Rigging & Contracting Company LLC | 595377 | 26 | 12 | Interstate |
| Chamberlain Contractors LLC | 3777139 | 25 | 17 | Interstate |
| Silk Transportation INC | 3904846 | 25 | 25 | Intrastate |
| Hatfield's Equipment And Dedication Services INC | 1037274 | 24 | 17 | Intrastate |
| Tanks Direct Shelters Direct | 1211751 | 22 | 14 | Interstate |
| Ab Construction INC | 1246274 | 21 | 20 | Interstate |
| Aves LLC | 3687368 | 21 | 45 | Intrastate |
| Els Transport LLC | 4247052 | 21 | 21 | Interstate |
| Poist Gas Company | 387776 | 18 | 16 | InterstateHazmat |
| Iron World Manufacturing LLC | 1484724 | 18 | 16 | Interstate |
| Laurel Fuel Oil And Heating CO INC | 467752 | 17 | 10 | InterstateHazmat |
| Metro Technical Services | 1808238 | 16 | 3 | Interstate |
| Automotive Support | 665870 | 13 | 10 | InterstateHazmat |
| Jireh Cable Installation INC | 3333563 | 13 | 13 | Intrastate |
| Metropolitan Moving & Storage | 1326082 | 12 | 16 | Interstate |
| P2 Cleaning Services LLC | 3089831 | 11 | 11 | Intrastate |
| Transportation Business | 4580967 | 11 | 8 | Interstate |
| Transportes Zuleta INC | 1675580 | 10 | 10 | Interstate |
| Addis Axis Logistics LLC | 7536254 | 10 | 10 | Interstate |
| Encore Recycling | 1301514 | 9 | 9 | Interstate |
| Eba Engineering, Inc. | 4586218 | 9 | 5 | Intrastate |
| Hofmann Bros Towing INC | 549732 | 8 | 8 | InterstateHazmat |
| Humphrey & Son INC | 699068 | 8 | 6 | Interstate |
| Warfield And Sanford INC | 1015741 | 8 | 8 | Interstate |
| Joseph Canova And Son INC | 1030430 | 8 | 4 | Intrastate |
| Anytime Towing & Recovery | 2258749 | 8 | 12 | IntrastateHazmat |
| 2020 Construction Group LLC | 2571873 | 8 | 8 | Intrastate |
| Laurel Sand & Gravel INC | 4273997 | 8 | 8 | Intrastate |
| Eastern Food Services INC | 469512 | 7 | 5 | Interstate |
| Global Parcel Express LLC | 2356603 | 7 | 4 | Interstate |
| Unibraz Logistic LLC | 2422400 | 7 | 6 | Interstate |
| Around The Clark Trucking LLC | 2571520 | 7 | 7 | Interstate |
| H&i Express INC | 2786530 | 7 | 8 | Interstate |
| Cdl Book Club LLC | 2964562 | 7 | 4 | Intrastate |
| No | 3542090 | 7 | 4 | Intrastate |
| Interior Plantscapes INC | 3865510 | 7 | 11 | Interstate |
| Past & Present Towing & Recovery INC | 449142 | 6 | 6 | Interstate |
| R&d Masonry INC | 1093665 | 6 | 6 | InterstateHazmat |
| Brown Services INC | 1373506 | 6 | 6 | Intrastate |
| Elegant Recycling And Refuse Services INC | 2518495 | 6 | 6 | Intrastate |
| Guardian Angels Towing LLC | 2881721 | 6 | 6 | IntrastateHazmat |
| Anthony Service LLC | 2910013 | 6 | 6 | Interstate |
| Antel Communications LLC | 2974258 | 6 | 7 | Interstate |
| Gt Trans INC | 3038936 | 6 | 6 | Interstate |
| Or Trucking LLC | 3051161 | 6 | 6 | Interstate |
| Aes | 3218145 | 6 | 2 | IntrastateHazmat |
| Cornejo Roofing LLC | 3293324 | 6 | 2 | Intrastate |
| Pioneers Power Washing INC | 3589925 | 6 | 3 | Interstate |
| Pierce's Services LLC | 3741258 | 6 | 1 | Intrastate |
| Blue Logistics INC | 4062897 | 6 | 7 | Interstate |
| Srvacjet | 4174471 | 6 | 6 | Interstate |
| W & S Trucking LLC | 9456058 | 6 | 8 | Interstate |
| R & A Movers INC | 591076 | 5 | 6 | Intrastate |
| Mec Trucking Excavating | 1011420 | 5 | 5 | Intrastate |
| Grounds Masters INC | 1045539 | 5 | 3 | Intrastate |
| Celorico Construction INC | 1074639 | 5 | 5 | Interstate |
| Hazleton Snow Removal | 1120375 | 5 | 3 | Intrastate |
| Putting-On-The-Ritz Catering | 1184663 | 5 | 8 | Interstate |
| Bio-Clean Portables INC | 1185683 | 5 | 2 | Intrastate |
| D&m Construction INC | 1361708 | 5 | 8 | IntrastateHazmat |
| Gramaco Granite & Marble LLC | 1618619 | 5 | 3 | Interstate |
| Johnson's Piano Moving | 1849560 | 5 | 5 | Interstate |
| Cava Foods | 2123503 | 5 | 11 | Interstate |
| Dir Construction | 2172808 | 5 | 5 | Intrastate |
| Stone Action LLC | 2317759 | 5 | 2 | Interstate |
| Global Business Solutions | 2317873 | 5 | 5 | Intrastate |
| Mid Atlantic Bath | 2386225 | 5 | 12 | Interstate |
| Sti | 2395980 | 5 | 6 | InterstateHazmat |
| A Plus Services LLC | 2560779 | 5 | 5 | Intrastate |
| Prestige Landscape & Tree Care LLC | 2591004 | 5 | 3 | Intrastate |
| Harding Brothers LLC | 2785708 | 5 | 4 | Interstate |
| Graceal LLC | 2878098 | 5 | 6 | Interstate |
| B&b Transportation LLC | 2922565 | 5 | 2 | Interstate |
| Scc Trucking LLC | 2924009 | 5 | 4 | Interstate |
| Prince Logistics LLC | 2978942 | 5 | 3 | Interstate |
| Transportation | 2982960 | 5 | 10 | Interstate |
| F & C Trucking INC | 3007300 | 5 | 20 | Interstate |
| King's Lawn Care LLC | 3022694 | 5 | 5 | Intrastate |
| Ab & M Delivery LLC | 3091427 | 5 | 5 | Interstate |
| Vallejo Masonry LLC | 3261569 | 5 | 2 | Interstate |
| Ariel Elias Meza Garcia | 3262051 | 5 | 4 | Intrastate |
| Ma & B Trucking LLC | 3521361 | 5 | 5 | Interstate |
| Mp Landscaping LLC | 3593037 | 5 | 2 | Intrastate |
| Jj Brothers Produce LLC | 3917659 | 5 | 4 | Interstate |
| Blue Mountain Logistics LLC | 4319044 | 5 | 5 | InterstateHazmat |
| Eben Fleet | 4372481 | 5 | 20 | Interstate |