| DCDeep Creek Cellars, INC. | Friendsville | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DVDejon Vineyards | Hydes | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DEDelaware Elevator Manufacturing Corporation | Salisbury | MD | Machinery Manufacturing333921 | — | ◐ LIKELY ACTIVE |
| DBDeli Brands of America | Baltimore | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| DBDenton Branch | Denton | MD | Food Manufacturing311520 | 1-19 | ◐ LIKELY ACTIVE |
| DEDerosa Engineering, INC. | Upper Marlboro | MD | Fabricated Metal Product Manufacturing332721 | — | ◐ LIKELY ACTIVE |
| DVDetour Vineyard and Winery, INC. | Detour | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DMDfa-dmd-frederick Md | Frederick | MD | Food Manufacturing311511 | 100-499 | ◐ LIKELY ACTIVE |
| D9DFM 9701 O'Brien Road | Fort Meade | MD | Computer and Electronic Product Manufacturing334511 | 1-19 | ◐ LIKELY ACTIVE |
Diamond Foods | Glen Burnie | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| DSDjm Security Services, LLC | Glenelg | MD | Computer and Electronic Product Manufacturing334515 | — | ◐ LIKELY ACTIVE |
| DGD&m Group Enterprises LLC | Silver Spring | MD | Wood Product Manufacturing321920 | — | ◐ LIKELY ACTIVE |
Doble Engineering Company (Accident, MD) | Accident | MD | Computer and Electronic Product Manufacturing334515 | 100-499 | ◐ LIKELY ACTIVE |
| DWDoc Waters Cidery | Germantown | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DEDouble Envelope of Maryland | Baltimore | MD | Paper Manufacturing322230 | 20-99 | ◐ LIKELY ACTIVE |
| DVDove Valley, LLC | Rising Sun | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DFDragonfly Farms | Mount Airy | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DADronexus Aero LLC | Hagerstown | MD | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| DSDry Seneca Creek Vineyards | Poolesville | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| DDSM-Firmenich | Columbia | MD | Food Manufacturing311221 | 20-99 | ◐ LIKELY ACTIVE |
| DSDS Smith, Cambridge Corrugated LLC | Cambridge | MD | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| DSD & S Technical Services INC | Essex | MD | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| DBDundalk Branch 38 | Dundalk | MD | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| DMDutch Mill Catering T/a Torn Apron Foods | Brentwood | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| ECEast Coast Fresh | Laurel | MD | Food Manufacturing311991 | 500+ | ◐ LIKELY ACTIVE |
| ECEast Coast Tactical, LLC | Chevy Chase | MD | Miscellaneous Manufacturing339113 | — | ◐ LIKELY ACTIVE |
| ECEastern Controls- ECI MD | Townson | MD | Computer and Electronic Product Manufacturing334513 | 1-19 | ◐ LIKELY ACTIVE |
| EREast Road Beverages | White Plains | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| EWEast West LLC | Landover | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| ECEaton Corporation | Hanover | MD | Electrical Equipment, Appliance & Component Manufacturing335311 | — | ◐ LIKELY ACTIVE |
| ELEcosonic LLC | Annapolis | MD | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| EBEdgewood Branch 23 | Edgewood | MD | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| ESElite Spice: Magellan | Hanover | MD | Food Manufacturing311942 | 20-99 | ◐ LIKELY ACTIVE |
| EDEllicott Distilling Company, LLC | Ellicott City | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| ESEncore Sausage Company | Hyattsville | MD | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| ECEnterprise Cabling, INC. | Cambridge | MD | Electrical Equipment, Appliance & Component Manufacturing335999 | — | ◐ LIKELY ACTIVE |
| ELEQI Logistics | Williamsport | MD | Machinery Manufacturing333924 | 20-99 | ◐ LIKELY ACTIVE |
| EIEquinox Innovative Systems INC | Columbia | MD | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| ELEsd LLC | Elkton | MD | Apparel Manufacturing315210 | — | ◐ LIKELY ACTIVE |
| EBEssex Branch 15 | Essex | MD | Chemical Manufacturing325120 | 1-19 | ◐ LIKELY ACTIVE |
| ELEssilor Laboratories Of America, Inc | Baltimore | MD | Miscellaneous Manufacturing339115 | 100-499 | ◐ LIKELY ACTIVE |
| EIEternusbio INC. | College Park | MD | Miscellaneous Manufacturing339114 | — | ◐ LIKELY ACTIVE |
| ESEveryday Saint Brewhouse | Leonardtown | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
Excelitas Technologies Corp. | Gaithersburg | MD | Machinery Manufacturing333994 | 20-99 | ◐ LIKELY ACTIVE |
| EBExpress Biotech International, INC. | Frederick | MD | Chemical Manufacturing325414 | — | ◐ LIKELY ACTIVE |
| EAEz Aero Mfg INC. | Hampstead | MD | Fabricated Metal Product Manufacturing332996 | — | ◐ LIKELY ACTIVE |
| FOFallen Oak Distilling | Olney | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FAFamily Affair Farm Winery | Easton | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FPFarm Picasso | Mount Airy | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FBFaulkner Branch Cidery & Distilling, LLC | Federalsburg | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |