 | Quality air & heating, INC | Frederick, maryland, united states | 18 | construction | - | |
 | yakabod, inc. | frederick, maryland, united states | - | computer software | 2001 | |
 | frederick mutual insurance company | frederick, maryland, united states | - | insurance | 1843 | |
| frederick primary care associates, p.a. | frederick, maryland, united states | - | medical practice | 1997 | |
| excalibur title & escrow llc | frederick, maryland, united states | - | insurance | 2004 | |
| mango billing, inc. | frederick, maryland, united states | - | computer software | 1991 | |
| sunvestment energy group | frederick, maryland, united states | - | financial services | 2013 | |
 | mha audio | frederick, maryland, united states | - | events services | 1983 | |
| caervision | frederick, maryland, united states | - | information technology and services | 2006 | |
 | the positive dog trainers | frederick, maryland, united states | - | professional training and coaching | - | |
 | mosaic power | frederick, maryland, united states | - | renewables and environment | 2011 | |
 | sesto senso | frederick, maryland, united states | - | international trade and development | - | |
| ulyssix technologies, inc. | frederick, maryland, united states | - | telecommunications | 2000 | |
 | boyle & company, pa | frederick, maryland, united states | - | accounting | 1986 | |
 | werres corporation | frederick, maryland, united states | - | logistics and supply chain | 1935 | |
| douniaprojects llc | frederick, maryland, united states | - | translation and localization | 2000 | |
| beagle bed & breakfast | frederick, maryland, united states | - | recreational facilities and services | 2015 | |
| highgear, inc. | frederick, maryland, united states | - | computer software | 2003 | |
| nice clean services | frederick, maryland, united states | - | facilities services | 2011 | |
| susquehanna nuclear | frederick, maryland, united states | - | utilities | - | |
