| JMJ & M Products, INC | San Fernando | 100–499 | ● ACTIVE |
Jmt INC. | Norwalk | 1–19 | ● ACTIVE |
Jr Machining LLC | Rohnert Park | 1–19 | ● ACTIVE |
J. W. Peacock & Son, Incorporated | Spring Valley | 20–99 | ● ACTIVE |
Jwp Manufacturing | Santa Clara | — | ● ACTIVE |
Kaiser Enterprises INC. | Murphys | 20–99 | ● ACTIVE |
Kalman Manufacturing, INC | Morgan Hill | 20–99 | ● ACTIVE |
Karan and Associates, INC | Fontana | 1–19 | ● ACTIVE |
| KSKb Sheetmetal Fabrication, INC. | Fountain Valley | 20–99 | ● ACTIVE |
| KMKdm Machine, INC. | Anaheim | 1–19 | ● ACTIVE |
Kennedy Name Plate CO | Vernon | 1–19 | ● ACTIVE |
Kern Steel Fabrication, INC. | Bakersfield | 20–99 | ● ACTIVE |
Kittyhawk INC | Garden Grove | 20–99 | ● ACTIVE |
K & L Anodizing Corporation | Burbank | 100–499 | ● ACTIVE |
Kl Coatings INC. | La Mirada | — | ● ACTIVE |
Klune Industries INC | North Hollywood | 100–499 | ● ACTIVE |
Koros USA INC | Moorpark | 20–99 | ● ACTIVE |
Krisalis Precision Machining | San Andreas | 1–19 | ● ACTIVE |
Kryler CORP | Fullerton | 20–99 | ● ACTIVE |
K S D, INC. | Banning | — | ● ACTIVE |
| KIKyocera International Inc.(san Diego) | San Diego | 500+ | ● ACTIVE |
Laminated Shim CO INC | Corona | 1–19 | ● ACTIVE |
Lawrence Roll Up Doors, INC. | Baldwin Park | 100–499 | ● ACTIVE |
Lean Manufacturing Group LLC | Valencia | 1–19 | ● ACTIVE |
| LSLevac Specialties INC. | Gold River | 1–19 | ● ACTIVE |
L.f. Industries, INC. | Carlsbad | 1–19 | ● ACTIVE |
Lindsey Manufacturing CO | Azusa | — | ● ACTIVE |
L & M Machining Corporation | Placentia | — | ● ACTIVE |
Long Machine, INC | Temecula | 1–19 | ● ACTIVE |
Loutech LLC | Chino | 20–99 | ● ACTIVE |
Lynco Grinding Company INC | Bell Gardens | 20–99 | ● ACTIVE |
Mac Cal CO | San Jose | 20–99 | ● ACTIVE |
Magna Tool INC. | Cypress | 20–99 | ● ACTIVE |
Martinez and Turek, INC. | Rialto | 20–99 | ● ACTIVE |
Marx Digital Mfg. INC. | Santa Clara | 20–99 | ● ACTIVE |
Master Metal Products Company | San Jose | 1–19 | ● ACTIVE |
Maverick Aerospace LLC | City of Industry | — | ● ACTIVE |
Mckenna Boiler Works, INC. | Oceanside | 20–99 | ● ACTIVE |
| MPMdc Precision LLC | Hayward | 100–499 | ● ACTIVE |
Mechanical Metal Finishing CO | Gardena | 1–19 | ● ACTIVE |
| MVMedtronic Vascular | Santa Rosa | 100–499 | ● ACTIVE |
Meggitt Defense Systems, INC. | Irvine | 100–499 | ● ACTIVE |
Melrose Metal Finishing, INC | Oakland | 1–19 | ● ACTIVE |
| MEMetal Etch Services INC | San Marcos | 20–99 | ● ACTIVE |
| MFMetal Finishing Group INC | Sacramento | 20–99 | ● ACTIVE |
Metal Improvement Company, LLC | Livermore | 20–99 | ● ACTIVE |
| MSMicro Steel, INC | Canoga Park | 1–19 | ● ACTIVE |
Millennium Metalcraft, INC. | Fremont | — | ● ACTIVE |
Miller Marine LLC | San Diego | 20–99 | ● ACTIVE |
Miniature Precision INC | Redding | — | ● ACTIVE |