| HIHi-tech Industries, LLC | Broken Arrow | — | ◇ UNVERIFIED |
| HIHmt, INC. | Blackwell | — | ◇ UNVERIFIED |
| HMHolmboe Manufacturing CO. | Oklahoma City | — | ◇ UNVERIFIED |
| HCHonor Companies LLC | Sapulpa | — | ◇ UNVERIFIED |
| HKHowco Kiefer | Kiefer | — | ◇ UNVERIFIED |
| ISIdeal Specialty, INC. | Tulsa | — | ◇ UNVERIFIED |
| IFIndustrial Fabrication Services, LLC | Sand Springs | — | ◇ UNVERIFIED |
| IMIndustrial Machine Company | Oklahoma City | — | ◇ UNVERIFIED |
| IMIndustrial Manufacturing Solutions, LLC | Jennings | — | ◇ UNVERIFIED |
| ISIndustrial Splicing and Sling, L.l.c. | Tulsa | — | ◇ UNVERIFIED |
| IMInland Machine and Welding CO. | Oklahoma City | — | ◇ UNVERIFIED |
| ISIns Specialties, LLC | Claremore | — | ◇ UNVERIFIED |
| ITIntegrated Tower Systems | Tulsa | — | ◇ UNVERIFIED |
| IFIpc Fabricators LLC | Tulsa | — | ◇ UNVERIFIED |
| JCJack's Custom Steel Products | Arcadia | — | ◇ UNVERIFIED |
| JWJakes Welding | Ringwood | — | ◇ UNVERIFIED |
| JPJanke Products, LLC | Oklahoma City | — | ◇ UNVERIFIED |
| JEJasar's Enterprises, INC. | Edmond | — | ◇ UNVERIFIED |
| JWJ.b.s' Welding, INC. | Ada | — | ◇ UNVERIFIED |
| JIJer-co Industries, INC. | Locust Grove | — | ◇ UNVERIFIED |
| JMJero Manufacturing, Inc. | Tulsa | — | ◇ UNVERIFIED |
| JAJoco Assembly LLC | Tulsa | — | ◇ UNVERIFIED |
| JRJoe Roberts Welding, INC. | Ringling | — | ◇ UNVERIFIED |
| JMJohnson Machine, INC. | Collinsville | — | ◇ UNVERIFIED |
| JSJorame Superior Honing | Tulsa | — | ◇ UNVERIFIED |
| JMJ&s Machine & Valve, INC. | Nowata | — | ◇ UNVERIFIED |
| JMJ's Metal Fabrication LLC | Tulsa | — | ◇ UNVERIFIED |
| JIJv Industrial Skiatook | Skiatook | — | ◇ UNVERIFIED |
| KKelvion | Catoosa | — | ◇ UNVERIFIED |
| KKelvion | Catoosa | — | ◇ UNVERIFIED |
| KKelvion (cimarron) | Catoosa | — | ◇ UNVERIFIED |
| KKelvion (keystone) | Catoosa | — | ◇ UNVERIFIED |
| KMKenco Manufacturing Co., INC. | Atoka | — | ◇ UNVERIFIED |
| KCKerkstra Creative Corporation | Tulsa | — | ◇ UNVERIFIED |
| KMKeystone Machine Works | Sand Springs | — | ◇ UNVERIFIED |
| KLKwikset Locks | Bristow | — | ◇ UNVERIFIED |
| LELaser En'ovation & Fabrication, INC. | Tulsa | — | ◇ UNVERIFIED |
| LGLaser Group, LLC | Tulsa | — | ◇ UNVERIFIED |
| LWLawton Window Co., INC. | Lawton | — | ◇ UNVERIFIED |
| LCLegacy Component Services, LLC | Oklahoma City | — | ◇ UNVERIFIED |
| LALj Allstar Enterprises, INC. | Moore | — | ◇ UNVERIFIED |
| LLL & L Awards LLC | Seminole | — | ◇ UNVERIFIED |
| LSLogan's Steel Buildings, INC. | Sayre | — | ◇ UNVERIFIED |
| LSLongreach Steel INC | Tecumseh | — | ◇ UNVERIFIED |
| LALouvers and Equipment Manufacturing, Inc., Dba Lemi | Owasso | — | ◇ UNVERIFIED |
| MMMac Machine, LLC | Pauls Valley | — | ◇ UNVERIFIED |
| MIMadison Industries, INC of Oklahoma | Tulsa | — | ◇ UNVERIFIED |
| MMalo | Tulsa | — | ◇ UNVERIFIED |
| MDMarine Development, INC. | Eufaula | — | ◇ UNVERIFIED |
| MIMaro International Corporation | Tulsa | — | ◇ UNVERIFIED |
