| LMLafarge Mid-atlantic, LLC - Jessup Plant | Jessup, MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LSLaurel Sand and Gravel, INC. - Elkridge | Elkridge, MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| LCLebanon Chemical 50 | Baltimore, MD | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| LBLegend Brands | Baltimore, MD | Chemical Manufacturing325611 | — | ◇ UNVERIFIED |
| LILocke Insulators INC | Baltimore, MD | Nonmetallic Mineral Product Manufacturing327110 | — | ◇ UNVERIFIED |
| MIMarada Industries | Westminster, MD | Transportation Equipment Manufacturing336370 | — | ◇ UNVERIFIED |
| MMMartin Marietta Laboratories | Halethorpe, MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| MCMaryland Compassionate Care and Wellness | Taneytown, MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| MCMaryland Concrete Septic Tank INC. | Maryland Line, MD | Nonmetallic Mineral Product Manufacturing327332 | — | ◇ UNVERIFIED |
| MMMaryland Mce Jessup Correctional Institution | Jessup, MD | Furniture and Related Product Manufacturing337127 | — | ◇ UNVERIFIED |
| MPMaryland Paving Churchville | Bel Air, MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MRMaryland Recycling | Baltimore, MD | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MSMaryland Specialty Wire | Cockeysville, MD | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| MCMccormick & CO - 10901 Gilroy Road | Hunt Valley, MD | Food Manufacturing311942 | — | ◇ UNVERIFIED |
| MCMccormick & Company, INC. | Hunt Valley, MD | Food Manufacturing311822 | — | ◇ UNVERIFIED |
| MCMccorquodale Color Card | Whiteford, MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MPMcgregor Printing | Westminster, MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MAMemtec America CORP. Plant I | Timonium, MD | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| MCMid-atlantic Coca-cola | Baltimore, MD | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| MMMonarch Manufacturing, INC. | Belcamp, MD | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |
| MCMpa - Cox Creek | Baltimore, MD | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| MNMpa North Locust Point Marine Terminal | Baltimore, MD | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| MLMpi Labels of Baltimore, INC | Baltimore, MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| MSM S Willett INC | Cockeysville, MD | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| NGNational Graphics | Baltimore, MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| NDNevamar Decorative Surfaces Div Odenton Facility | Odenton, MD | Plastics and Rubber Products Manufacturing326130 | — | ◇ UNVERIFIED |
| NCNew Cingular Wireless Pcs, LLC Dba At&t Mobility | Columbia, MD | Miscellaneous Manufacturing339920 | — | ◇ UNVERIFIED |
| NNNew Ngc INC (dba National Gypsum Co) | Belcamp, MD | Chemical Manufacturing325520 | — | ◇ UNVERIFIED |
| NNNexagen Networks INC. | Aberdeen, MD | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| NWNiermann Weeks Company, INC | Millersville, MD | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Defense Systems | Middle River, MD | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| NGNorthrop Grumman Systems CORP -troy Hill 4 | Elkridge, MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| NINovatec INC | Brooklyn, MD | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| NCNoxell CORP. | Cockeysville, MD | Chemical Manufacturing325620 | — | ◇ UNVERIFIED |
| NLNutramax Laboratories | Edgewood, MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| OAOldcastle Apg Mid-atlantic Crofton, Md | Odenton, MD | Nonmetallic Mineral Product Manufacturing327331 | — | ◇ UNVERIFIED |
| OPOldcastle Precast INC. | Edgewood, MD | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| OIOnguard Industries LLC | Havre De Grace, MD | Leather and Allied Product Manufacturing316210 | — | ◇ UNVERIFIED |
| OMOpta Minerals | Baltimore, MD | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| OBOrigin Baltimore Recycling, LLC | Curtis Bay, MD | Petroleum and Coal Products Manufacturing324110 | — | ◇ UNVERIFIED |
| OMOsprey Marine Composites INC | Tracys Landing, MD | Transportation Equipment Manufacturing336611 | — | ◇ UNVERIFIED |
| PPace | Annapolis Junction, MD | Fabricated Metal Product Manufacturing332212 | — | ◇ UNVERIFIED |
| PCPall Ciorporation Plant 2 | Lutherville Timonium, MD | Machinery Manufacturing333412 | — | ◇ UNVERIFIED |
| PFPall Filtration & Separations Group | Timonium, MD | Machinery Manufacturing333412 | — | ◇ UNVERIFIED |
| PRPaul Reed Smith Guitars, Limited Partnership | Stevensville, MD | Miscellaneous Manufacturing339992 | — | ◇ UNVERIFIED |
| PPPavsner Press INC | Baltimore, MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| PFP. Flanigan and Sons, INC - Annapolis Rd | Baltimore, MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PPPharmaceutical Preperation Manufacturing | Hunt Valley, MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PIPharmaceutics International INC. | Cockeysville, MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| PIPharmaceutics International, INC. | Hunt Valley, MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
