 Craftech Metal Forming, INC | Perris | — | ● ACTIVE |
 Aluminum Die Casting Company, INC. | Jurupa Valley | 20–99 | ● ACTIVE |
| LGLuxfer Gas Cylinders | Riverside | 100–499 | ● ACTIVE |
| CWCentral Wire Group | Perris | 20–99 | ◐ LIKELY ACTIVE |
| SASierra Aluminum CO | Riverside | — | ◇ UNVERIFIED |
| HPHarbor Pipe and Steel INC | Riverside | 100–499 | ◐ LIKELY ACTIVE |
| MAMerit Aluminum Inc. | Corona | 100–499 | ◐ LIKELY ACTIVE |
| STSkat Trak | Calimesa | 1–19 | ◐ LIKELY ACTIVE |
| EFEdelbrock Foundry CORP | San Jacinto | — | ◐ LIKELY ACTIVE |
| 3F3v Fastners CO INC | Corona | — | ◇ UNVERIFIED |
 Matthews International CORP | Romoland | — | ◇ UNVERIFIED |
| STSteel Technologies LLC | Mira Loma | — | ◇ UNVERIFIED |
| EGEdelbrock Group, LLC | San Jacinto | 100–499 | ◐ LIKELY ACTIVE |
| HJHillary J Hyman | Indio | — | ◐ LIKELY ACTIVE |
| MAMerit Aluminum Inc (Building #2) | Corona | 100–499 | ◐ LIKELY ACTIVE |
| RSRiverside Steel, Inc. | Perris | 100–499 | ◐ LIKELY ACTIVE |
| SASierra Aluminum a Division of Samuel Son & Co. - HQ - Riverside | Riverside | 100–499 | ◐ LIKELY ACTIVE |
| WWildomar | Wildomar | 20–99 | ◐ LIKELY ACTIVE |
| WMWolf Manufacturing LLC | Corona | — | ◐ LIKELY ACTIVE |
| LHLuxco Holdings, L.l.c | Eastvale | — | ◐ LIKELY ACTIVE |
| PGPacific Gear Technology, INC. | Norco | — | ◇ UNVERIFIED |
| TITubeworks INC. | Riverside | — | ◇ UNVERIFIED |
| UMUnited Metal Products | Corona | — | ◇ UNVERIFIED |
| AMAlumax Mill Products INC | Riverside | — | ◇ UNVERIFIED |
| ACAluminum Company of America Corona Operation | Corona | — | ◇ UNVERIFIED |
| ASAluminum Seating INC. | Riverside | — | ◇ UNVERIFIED |
| ACApex Conveyor Systems INC | Murrieta | — | ◇ UNVERIFIED |
| AMApollo Masters Corporation | Banning | — | ◇ UNVERIFIED |
| BHBag House Industrial Sheet Metal | Corona | — | ◇ UNVERIFIED |
| BCBender Ccp INC | Corona | — | ◇ UNVERIFIED |
| BPBrenntag Pacific, INC. | Jurupa Valley | — | ◇ UNVERIFIED |
| CSCalstrip Steel Corporation | Mira Loma | — | ◇ UNVERIFIED |
| CVClow Valve Company | Corona | — | ◇ UNVERIFIED |
| CSCrest Steel | Jurupa Valley | — | ◇ UNVERIFIED |
| CHCsr Hydro Conduit | Corona | — | ◇ UNVERIFIED |
| DWDavis Wire CORP Dba Viking Wire LLC | Mira Loma | — | ◇ UNVERIFIED |
| EPEdelbrock Permanent Mold LLC | San Jacinto | — | ◇ UNVERIFIED |
| EPEquip Pro | Temecula | — | ◇ UNVERIFIED |
| FAFrontier Aluminum Corporation | Corona | — | ◇ UNVERIFIED |
| GSGJ&J Sheet Metal Fabrication | Norco | — | ◇ UNVERIFIED |
| KSKgel Steel, INC | Riverside | — | ◇ UNVERIFIED |
| KWKmc Wheel CO INC | Riverside | — | ◇ UNVERIFIED |
| LBListon Brick Company of Corona | Corona | — | ◇ UNVERIFIED |
| LTL to Z Ent INC | Banning | — | ◇ UNVERIFIED |
| LULuxfer USA LTD | Riverside | — | ◇ UNVERIFIED |
| Matthews International Corporation | San Jacinto | — | ◇ UNVERIFIED |
| MIMiranda Iron Works Inc. | Lake Elsinore | — | ◇ UNVERIFIED |
| RSRenco Systems INC | Banning | — | ◇ UNVERIFIED |
| RPR P M Centerless Grinding CO | Norco | — | ◇ UNVERIFIED |
| SASierra Aluminum, Div of Samuel, Son & CO | Riverside | — | ◇ UNVERIFIED |
