 Decco Castings INC | El Cajon | CA | Primary Metal Manufacturing331524 | — | ● ACTIVE |
 Eddy Pump Corporation | El Cajon | CA | Machinery Manufacturing333911 | — | ● ACTIVE |
 Alturdyne International | El Cajon | CA | Machinery Manufacturing333611 | — | ● ACTIVE |
 Formalloy Technologies, INC | El Cajon | CA | Machinery Manufacturing333248 | — | ● ACTIVE |
 Hq Kisso Air Conditioning | El Cajon | CA | Machinery Manufacturing333415 | — | ● ACTIVE |
 Roemer Industries INC | El Cajon | CA | Machinery Manufacturing333415 | — | ● ACTIVE |
| DTDelstar Technologies | El Cajon | CA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| CMCa66 Mil Aero | El Cajon | CA | Machinery Manufacturing333413 | 20-99 | ◐ LIKELY ACTIVE |
| FRFortin Racing INC | El Cajon | CA | Machinery Manufacturing333612 | — | ◇ UNVERIFIED |
| ACAllied Castings INC | El Cajon | CA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| BCBear CNC Machining, Inc. | El Cajon | CA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| CMCampbell Membrane Technologies INC | El Cajon | CA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| CECasa El Cajon | El Cajon | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| DDData Disposal INC | El Cajon | CA | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| DRD & R Crane INC | El Cajon | CA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
| ECEl Cajon Energy, LLC | El Cajon | CA | Machinery Manufacturing333611 | — | ◇ UNVERIFIED |
| GIGreenbroz, INC. | El Cajon | CA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| MTMcintyre Tool & Machine | El Cajon | CA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| MMMontes Metal Finishing | El Cajon | CA | Fabricated Metal Product Manufacturing332813 | — | ◇ UNVERIFIED |
| PFPipe Fabricators International | El Cajon | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| PHPrime Heat, Incorporated | El Cajon | CA | Machinery Manufacturing333994 | — | ◇ UNVERIFIED |
| SDSan Diego Compressed Air Power LLC Dba Advanced Air & Vacuum | El Cajon | CA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| SHSocal Hydraulics | El Cajon | CA | Fabricated Metal Product Manufacturing332912 | — | ◇ UNVERIFIED |
| SDSuspension Development Group | El Cajon | CA | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| TEThyssen Elevator CORP | El Cajon | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| TVTucker's Valley Furniture | El Cajon | CA | Machinery Manufacturing333415 | — | ◇ UNVERIFIED |
| WSWilliams & Sons Masonry | El Cajon | CA | Machinery Manufacturing333923 | — | ◇ UNVERIFIED |
