| LPLa Plata Ready Mix Concrete | La Plata | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| LELarry E. Knight, INC. | Glyndon | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| LBLawrence Bread CO. LLC | Annapolis | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| LCLebanon Chemical CORP | Baltimore | MD | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| LTLentigen Technology, INC. | Gaithersburg | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| LKLevenson & Klein | Baltimore | MD | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| LMLf Machine Company | Frederick | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| LMLinda M. Orr-ciccozzi | Beltsville | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| LTLinear Tube Audio | Takoma Park | MD | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| LALiquidity AW, L.L.C. | Mount Airy | MD | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| LMLlama Mama LLC DBA Llamas Corner | Oakland | MD | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| LFLong Fence Company, INC. | Ijamsville | MD | Fabricated Metal Product Manufacturing332618 | — | ◇ UNVERIFIED |
| LWLouison Woodworks, INC | Jessup | MD | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| LSL & S Machine Co., INC. | Halethorpe | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MBMacarons By Ashley LLC | Cumberland | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| MBMacmillan Bloedel Contaners | Odenton | MD | Paper Manufacturing322211 | — | ◇ UNVERIFIED |
| MMMagothy Millwork LLC | Glen Burnie | MD | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| MLMail-well Label | Highlandtown | MD | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| MLMaison LLC | Brunswick | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| MWManor Woods Design LLC | Glen Arm | MD | Furniture and Related Product Manufacturing337212 | — | ◇ UNVERIFIED |
| MIMarada Industries INC | Westminster | MD | Transportation Equipment Manufacturing336370 | — | ◇ UNVERIFIED |
| MMMarble Mantel, INC. | Rockville | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MIMarelco, INC. and Its Successors and Assigns | Beltsville | MD | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MKMark Knoedler | Ijamsville | MD | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| MRMarshall Ruby INC | Frostburg | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MPMaryland Packaging Transport Services, LLC | Elkridge | MD | Food Manufacturing311999 | — | ◇ UNVERIFIED |
| MPMaryland Paving Rosedale, LLC | Rosedale | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| MPMaryland Place Holder 15 | Elkridge | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| MSMaryland Sound and Image Inc | Randallstown | MD | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| MSMaryland Structural Fabricators INC | Millington | MD | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| MMasPanadas | Rockville | MD | Food Manufacturing311412 | — | ◇ UNVERIFIED |
| MPMaw Print LLC | Frederick | MD | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| MMMayne Medical Services, LLC | Fallston | MD | Miscellaneous Manufacturing339112 | — | ◇ UNVERIFIED |
| MTMccarthy Tire Service Company of Maryland INC | Federalsburg | MD | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| MAMccutcheon Apple Products INC. | Frederick | MD | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| MPMcp Processing | Hagerstown | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| MDM & D Machine Company | Linthicum | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| MLMeringue, LLC | Nottingham | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| MEMetropolitan Enterprises INC | Waldorf | MD | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| MTMetro Test and Balance, INC. | Capitol Heights | MD | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| MAMid Atlantic Filter, LLC | Salisbury | MD | Machinery Manufacturing333413 | — | ◇ UNVERIFIED |
| MWMIG Waugh Chapel, LLC | Gambrills | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| MSMiirant Station H | Dickerson | MD | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| MTMike's Train House, INC | Columbia | MD | Transportation Equipment Manufacturing336991 | — | ◇ UNVERIFIED |
| MIMillennium Inorganic Chemicals INC | Baltimore | MD | Chemical Manufacturing325130 | — | ◇ UNVERIFIED |
| MQMillville Quarry | Baltimore | MD | Nonmetallic Mineral Product Manufacturing327992 | — | ◇ UNVERIFIED |
| MPMinuteman Press of Owings Mills | Owings Mills | MD | Printing and Related Support Activities323114 | — | ◇ UNVERIFIED |
| MMM & M Precast INC | North East | MD | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| MLMobern Lighting Company | Jessup | MD | Electrical Equipment, Appliance & Component Manufacturing335121 | — | ◇ UNVERIFIED |
| MBMobile Blanco INC | Rockville | MD | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
