| RPRobinson Plating | Richmond | CA | — | ◇ UNVERIFIED |
| RSRobinson's Sheet Metal Works INC | Corcoran | CA | — | ◇ UNVERIFIED |
| RTRob Thomas Machining | Gilroy | CA | — | ◇ UNVERIFIED |
| RWRob Widiner Machining | Carpinteria | CA | — | ◇ UNVERIFIED |
| RERoca Engineering Inc. | Fontana | CA | — | ◇ UNVERIFIED |
| RMRochester Machine Corporation | New Brighton | PA | — | ◇ UNVERIFIED |
| RMRochester Metalwerx & Manufacturing INC | Lake City | MN | — | ◇ UNVERIFIED |
| RPRochester Precision Machine INC | Rochester | MN | — | ◇ UNVERIFIED |
| RTRochester Tool & Cutter | Rochester Hills | MI | — | ◇ UNVERIFIED |
| RTRoche Tool & Die Corporation | Marlborough | MA | — | ◇ UNVERIFIED |
| RMRockbound Manufacturing INC. | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| RMRockbound Manufacturing INC. | Franklin Park | IL | — | ◇ UNVERIFIED |
| RMRocket Machining & Design, Inc. | Hickory Corners | MI | — | ◇ UNVERIFIED |
| RMRockhill Machine, LLC | Barberton | OH | — | ◇ UNVERIFIED |
| RCRockingham-lunex Company - Former Site of | Bettendorf | IA | — | ◇ UNVERIFIED |
| RRRocking R Ranch LLC | Noble | OK | — | ◇ UNVERIFIED |
| RCRockquality Consulting LLC | Liberty Hill | TX | — | ◇ UNVERIFIED |
| RRRock River Blacksmith LLC | Watertown | WI | — | ◇ UNVERIFIED |
| RSRock Solid Tops LLC | Pembroke | MA | — | ◇ UNVERIFIED |
| RMRocksteady Manufacturing LLC | Roseville | MI | — | ◇ UNVERIFIED |
| RARocksun Acquisitions, LLC dba Lightning Chassis | Liberty Township | OH | — | ◇ UNVERIFIED |
| RTRock Tough INC | Bend | OR | — | ◇ UNVERIFIED |
| RCRockwell Collins Flight Control & Information Systems | Irvine | CA | — | ◇ UNVERIFIED |
| RIRockwerx, INC. | Portland | ME | — | ◇ UNVERIFIED |
| RMRocky Mountain Electric Motors | Grand Junction | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Machine Shop Inc.- Salt Lake City Machine Shop | Salt Lake City | UT | — | ◇ UNVERIFIED |
| RMRocky Mountain Racks, LLC | Berthoud | CO | — | ◇ UNVERIFIED |
| RMRocky Mountain Sandblasting | Henderson | CO | — | ◇ UNVERIFIED |
| RTRocky Top Machine | West Plains | MO | — | ◇ UNVERIFIED |
| RHRocore Holdings, INC. | Franklin | WI | — | ◇ UNVERIFIED |
| RPRodak Plastics CO. INC. | Hayward | CA | — | ◇ UNVERIFIED |
| RMRodewald Manufacturing Inc | Painesville | OH | — | ◇ UNVERIFIED |
| RERodgers Engineering CORP | Addison | IL | — | ◇ UNVERIFIED |
| RIRodrigco Industries Inc. | Oceanside | CA | — | ◇ UNVERIFIED |
| RARodriguez All Bumper Repair | Marysville | CA | — | ◇ UNVERIFIED |
| RPRoebuck Plastics & Machining INC | Moore | SC | — | ◇ UNVERIFIED |
| RPRoebuck Precision Machine, INC | Goldsboro | NC | — | ◇ UNVERIFIED |
| RERoechling Engineering Plastics | Dallas | NC | — | ◇ UNVERIFIED |
| RTRoehr Tool Solutions | Sterling | MA | — | ◇ UNVERIFIED |
| RCRogers Clinton Readi Mix | Clinton | IL | — | ◇ UNVERIFIED |
| RMRogers Machine Company, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| RMRogers Manufacturing Company | Middlefield | CT | — | ◇ UNVERIFIED |
| RTRogers Tool Works | Rogers | AR | — | ◇ UNVERIFIED |
| RERogue Energies, LLC | Rogue River | OR | — | ◇ UNVERIFIED |
| RIRohr Inc, a Utc Aerospace Systems Company | Chula Vista | CA | — | ◇ UNVERIFIED |
| RIRohr INC Brown Field | San Diego | CA | — | ◇ UNVERIFIED |
| RIRohr Industries, INC. | Saint Marys | PA | — | ◇ UNVERIFIED |
| RARo-lab American Rubber Company | Tracy | CA | — | ◇ UNVERIFIED |
| RNRoland Numeric INC | White Bear Lake | MN | — | ◇ UNVERIFIED |
 Rolar Manufacturing Corporation | Muskegon Heights | MI | — | ◇ UNVERIFIED |
