| Mnr Industries LLC | Health Care and Social Assistance | $5,173,964 | $5,234,209 | 444 | $79.0M |  Research |
| Jones Junction INC | Retail Trade | $3,862,900 | $3,907,538 | 424 | $106.8M | Research |
| Bel Air Nissan INC | Retail Trade | $2,100,100 | $2,124,543 | 234 | $59.0M | Research |
| Spartan Surfaces, Inc. | Retail Trade | $1,858,317 | $1,872,115 | 107 | $19.4M | Research |
| Vascular Surgery Associates LLC | Health Care and Social Assistance | $1,406,870 | $1,153,234 | 107 | $33.6M | Research |
| Bernstein & Robinson Dermatology, P.a. | Professional, Scientific, and Technical Services | $1,273,038 | $220,805 | 64 | $20.4M | Research |
| Podiatry Associates, P.a. | Administrative and Support and Waste Management | $1,231,600 | $1,239,537 | 109 | $20.6M | Research |
| American Design and Build Ltd | Construction | $1,075,940 | $1,087,237 | 120 | $36.5M | Research |
| B.a.f.s., Inc. | Retail Trade | $970,800 | $976,490 | 161 | $25.1M | Research |
| American Design and Build Ltd | Construction | $955,179 | $963,908 | 83 | $25.2M | Research |
| Bob Bell Chevrolet of Bel Air, Inc. | Wholesale Trade | $953,112 | $958,831 | 80 | $24.5M | Research |
| Plaza Ford, Incorporated | Finance and Insurance | $935,100 | $943,282 | 68 | $34.9M | Research |
| St Margaret Roman Catholic Congregation | Other Services (except Public Administration) | $921,600 | $929,427 | 179 | N/A | Research |
| Chesapeake Environmental Management, INC | Professional, Scientific, and Technical Services | $856,657 | $868,556 | 40 | <$5M | Research |
| Ban Automotive LLC | Retail Trade | $840,077 | $846,075 | 94 | $14.7M | Research |
| Chesapeake Environmental Management Inc. | Professional, Scientific, and Technical Services | $728,500 | $737,141 | 49 | $5.1M | Research |
| The Harford Day School, Incorporated | Educational Services | $724,500 | $729,089 | 65 | N/A | Research |
| Maryland Concrete Foundations, Inc. | Construction | $667,500 | $673,322 | 58 | $13.4M | Research |
| Harford Health & Fitness Club INC | Arts, Entertainment, and Recreation | $623,400 | $626,856 | 93 | $13.0M | Research |
| Jones Bel Air Motors LLC | Retail Trade | $623,100 | $627,600 | 100 | $27.0M | Research |
| Harford Health & Fitness Club INC | Arts, Entertainment, and Recreation | $618,065 | $623,919 | 93 | $13.0M | Research |
| Pediatric Partners, LLC | Health Care and Social Assistance | $573,999 | $582,884 | 65 | $20.4M | Research |
| Jordan Thomas Saloninc. | Other Services (except Public Administration) | $566,440 | $572,291 | 68 | $13.0M | Research |
| Jordan Thomas Salon,inc. | Other Services (except Public Administration) | $566,400 | $574,904 | 68 | $13.0M | Research |
| A Bright Idea LLC | Professional, Scientific, and Technical Services | $566,292 | $569,454 | 40 | <$5M | Research |