| GFGeneral Foundry Service CORP | San Leandro | 20–99 | ● ACTIVE |
 Morgan Advanced Ceramics, INC. | Hayward | 100–499 | ● ACTIVE |
| PSPcc Structurals - San Leandro | San Leandro | 100–499 | ● ACTIVE |
 Applied Ceramics, INC. | Fremont | — | ● ACTIVE |
 Centerline Precision Tube Bending INC | Dublin | — | ● ACTIVE |
 Coulter Forge, LLC | Emeryville | — | ● ACTIVE |
| MPMdc Precision LLC | Hayward | — | ● ACTIVE |
 Rotometals, INC | San Leandro | — | ● ACTIVE |
| NUNew United Motor Manufacturing | Fremont | — | ◐ LIKELY ACTIVE |
| PCPressure Cast Products Corporation | Oakland | 1–19 | ◐ LIKELY ACTIVE |
 Sp Manufacturing INC | Livermore | — | ◐ LIKELY ACTIVE |
 Precision Founders Incorporated | San Leandro | — | ◐ LIKELY ACTIVE |
| CICass INC | Oakland | — | ◐ LIKELY ACTIVE |
| IMIntergrated Manufacturing Group | Livermore | — | ◐ LIKELY ACTIVE |
| CWCalifornia Waste Solutions | Oakland | — | ◇ UNVERIFIED |
| CMCerro Metal Products Company | Newark | — | ◇ UNVERIFIED |
| DWDavis Wire Coporation | Hayward | — | ◇ UNVERIFIED |
| DIDuranium INC. | Alameda | — | ◐ LIKELY ACTIVE |
| 5I513 Independent Road, LLC | Oakland | — | ◇ UNVERIFIED |
| ABA B & I Foundry | Oakland | — | ◇ UNVERIFIED |
 Aepnus Technology INC | Emeryville | — | ◇ UNVERIFIED |
| ATAgilent Technologies | Hayward | — | ◇ UNVERIFIED |
| ASAir Show Network | Oakland | — | ◇ UNVERIFIED |
| ASAllan Schaffer | Livermore | — | ◇ UNVERIFIED |
| AFArtworks Foundry LLC | Berkeley | — | ◇ UNVERIFIED |
| BEBrillouin Energy CORP. | Emeryville | — | ◇ UNVERIFIED |
| CSCamblin Steel INC | Oakland | — | ◇ UNVERIFIED |
| CCastco | San Leandro | — | ◇ UNVERIFIED |
| CPClamp-swing Pricing CO INC | Oakland | — | ◇ UNVERIFIED |
| CACoast Aluminum | Hayward | — | ◇ UNVERIFIED |
| CLCr Laurence - Union City | Union City | — | ◇ UNVERIFIED |
| DWDan's Wire Mfg, INC | Fremont | — | ◇ UNVERIFIED |
| DCDielectric Coating Industries INC | Hayward | — | ◇ UNVERIFIED |
| EEExperimental Engineering LLC | Newark | — | ◇ UNVERIFIED |
| HVHarbor View CO | Oakland | — | ◇ UNVERIFIED |
| HIHummingbirdev INC | Livermore | — | ◇ UNVERIFIED |
| KAKaiser Aluminum & Chemical CORP | Pleasanton | — | ◇ UNVERIFIED |
| KMKhemia Metals INC. | Oakland | — | ◇ UNVERIFIED |
| KIKuprion, INC. | Fremont | — | ◇ UNVERIFIED |
| MFMacaulay Foundry INC | Berkeley | — | ◇ UNVERIFIED |
| MIMcwane, INC. | Oakland | — | ◇ UNVERIFIED |
| MAMzd Acquisitions INC Dba Moz Designs INC | Oakland | — | ◇ UNVERIFIED |
| NSNanogen Solutions LLC | Hayward | — | ◇ UNVERIFIED |
| NENew England Lead Burning Co, INC | San Leandro | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant | Berkeley | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #1 | Berkeley | — | ◇ UNVERIFIED |
| PSPacific Steel Casting Co-plant #3 | Berkeley | — | ◇ UNVERIFIED |
| PCPrecision Cast Products | Oakland | — | ◇ UNVERIFIED |
| Precision Founders, INC. Dba Pcc Structurals San Leandro | San Leandro | — | ◇ UNVERIFIED |
| RSRecycling Services Alliance, I | Fremont | — | ◇ UNVERIFIED |
