| PPPerryville Portable Plant | Perryville | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PFP. Flanigan - Sons, INC. | Baltimore | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PBPherm Brewing Company LLC | Gambrills | MD | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| PCPhoenix Color | Hagerstown | MD | Printing and Related Support Activities323114 | — | ◇ UNVERIFIED |
| PCPhoenix Color Corp.- Paper Converting Building | Hagerstown | MD | Paper Manufacturing322299 | — | ◇ UNVERIFIED |
| PEPowdercoat Express, LLC | Essex | MD | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| PCPowercon Corporation | Cumberland | MD | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| PPPowertrain Products, INC. | Stevensville | MD | Machinery Manufacturing333998 | — | ◇ UNVERIFIED |
| PDPratt Dental Laboratory, Inc | Middletown | MD | Miscellaneous Manufacturing339116 | — | ◇ UNVERIFIED |
| PPPrefab Plus LLC | Cockeysville | MD | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| PFPrime Foods LLC | Baltimore | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| PGPro Green Medical | Frederick | MD | Chemical Manufacturing325411 | — | ◇ UNVERIFIED |
| PGProtec Glass, LLC | Frederick | MD | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PGProtec Glass LLC T a Rowland Glass Studios | Frederick | MD | Nonmetallic Mineral Product Manufacturing327215 | — | ◇ UNVERIFIED |
| PLPyrodex LLC 672178 | Baltimore | MD | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| QOQrs of Maryland, LLC | Dundalk | MD | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| QPQueenstown Plant | Queenstown | MD | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RRRapid Response Research Group, LLC | California | MD | Computer and Electronic Product Manufacturing334511 | — | ◇ UNVERIFIED |
| RJRAW Juice & Wellness Lab LLC | La Plata | MD | Food Manufacturing311411 | — | ◇ UNVERIFIED |
| RTRays Touch Furniture LLC | Upper Marlboro | MD | Furniture and Related Product Manufacturing337122 | — | ◇ UNVERIFIED |
| RDR. D. Bowman & Sons, Incorporated | Westminster | MD | Food Manufacturing311119 | — | ◇ UNVERIFIED |
| RIRegenxbio, INC | Rockville | MD | Chemical Manufacturing325414 | — | ◇ UNVERIFIED |
| RCReliable Contracting CO. INC. | Waldorf | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RCReliable Contracting Company, INC. | Annapolis | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RRReproductions - Rickenbacker Drive | Gaithersburg | MD | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| RAResidence Act Distillery LLC | Riverdale | MD | Beverage and Tobacco Product Manufacturing312140 | — | ◇ UNVERIFIED |
| RTResley Tire CO INC | Hagerstown | MD | Plastics and Rubber Products Manufacturing326212 | — | ◇ UNVERIFIED |
| RGR Ganassa Tile CO INC | Ijamsville | MD | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| RGR Getty Browning Associates | Davidsonville | MD | Fabricated Metal Product Manufacturing332322 | — | ◇ UNVERIFIED |
| RRRichann Rodeheaver, LLC | Oakland | MD | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
 Rlt Printing Corporation | Bethesda | MD | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| RSRoamer Solutions LLC | Gaithersburg | MD | Transportation Equipment Manufacturing336213 | — | ◇ UNVERIFIED |
| RLRobert Lee Miller | Clear Spring | MD | Wood Product Manufacturing321912 | — | ◇ UNVERIFIED |
| RCRoberts Communications Consulting, LLC | Annapolis | MD | Computer and Electronic Product Manufacturing334220 | — | ◇ UNVERIFIED |
| RBRock-tenn Box - Broening Highway | Baltimore | MD | Paper Manufacturing322212 | — | ◇ UNVERIFIED |
| RFRomano Family Food Services, LLC | Catonsville | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| R1Rooted 1824 Wine Company, L.L.C | Owings Mills | MD | Beverage and Tobacco Product Manufacturing312130 | — | ◇ UNVERIFIED |
| RURoxul USA INC. | Elkridge | MD | Fabricated Metal Product Manufacturing332311 | — | ◇ UNVERIFIED |
| RSRpm Solutions Group INC | Baltimore | MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| RDRr Donnellley-h&n Printing | Timonium | MD | Printing and Related Support Activities323110 | — | ◇ UNVERIFIED |
| RFR&R Fabrication Enterprises, LLC | Prince Frederick | MD | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
 R&r Trade International, INC. | Columbia | MD | Food Manufacturing311920 | — | ◇ UNVERIFIED |
| RERt Engineering, INC. | Eldersburg | MD | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| RPRussell Paving Co, INC. | East New Market | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RSRussell Standard Baltimore | Curtis Bay | MD | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RSRussell-stanley Services | Dundalk | MD | Fabricated Metal Product Manufacturing332812 | — | ◇ UNVERIFIED |
| RCRuxton Chocolates LLC | Baltimore | MD | Food Manufacturing311352 | — | ◇ UNVERIFIED |
| SSSacre Sucre LLC | Baltimore | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| SSSacre Sucre LLC | Baltimore | MD | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| SLSafelineFP, LLC | Stevensville | MD | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
