| JAJudson A. Smith Company | Boyertown | PA | — | ◇ UNVERIFIED |
| JSJunior Steel CO | Sun Valley | CA | — | ◇ UNVERIFIED |
| JMJustin's Motorsports | Cocolalla | ID | — | ◇ UNVERIFIED |
| JIJv Industrial Beaumont | Beaumont | TX | — | ◇ UNVERIFIED |
| JIJv Industrial La Porte | La Porte | TX | — | ◇ UNVERIFIED |
| JIJv Industrial Skiatook | Skiatook | OK | — | ◇ UNVERIFIED |
| JMJWB Manufacturing LLC | Tempe | AZ | — | ◇ UNVERIFIED |
| JWJ & W Stainless Steel Fabricators, INC. | San Antonio | TX | — | ◇ UNVERIFIED |
| JAJyoti Americas, LLC | Conroe | TX | — | ◇ UNVERIFIED |
| KTKalenborn Technologies LLC | Soddy Daisy | TN | — | ◇ UNVERIFIED |
| KLKamax L P | Troy | MI | — | ◇ UNVERIFIED |
| KVKankakee Valley Steel | Wheatfield | IN | — | ◇ UNVERIFIED |
| KMKannon Manufacturing Inc | Forest Hill | TX | — | ◇ UNVERIFIED |
| KHKardia Holding, LLC | Denver | CO | — | ◇ UNVERIFIED |
| KHKarel Hansen Iron Works INC Dba Hansen Karel Iron | Gardena | CA | — | ◇ UNVERIFIED |
| KSKaty Steel Company INC. | Katy | TX | — | ◇ UNVERIFIED |
| KFKava Fabrication, INC. | Fargo | ND | — | ◇ UNVERIFIED |
| KSKb Steel & Building Products | Newport Beach | CA | — | ◇ UNVERIFIED |
| KBK & B Welding | Pembroke | MA | — | ◇ UNVERIFIED |
| KTKcb Towers INC | Highland | CA | — | ◇ UNVERIFIED |
| KFKC Fab LLC | Grandview | MO | — | ◇ UNVERIFIED |
| KFKc Forge Ornamental LLC | Kansas City | KS | — | ◇ UNVERIFIED |
| KTKci Technologies INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| KTKc Tank | Kansas City | KS | — | ◇ UNVERIFIED |
| KJKDK Jet Property Management LLC | Bellevue | ID | — | ◇ UNVERIFIED |
| KKKd Kustom Fab CO. | Boring | OR | — | ◇ UNVERIFIED |
| KFKds Fabrication and Machining Specialties, INC. | Hiddenite | NC | — | ◇ UNVERIFIED |
| KMKeating Manufacaturing & Fabrication, INC | Covington | LA | — | ◇ UNVERIFIED |
| KSKeech Steel INC. | Salt Lake City | UT | — | ◇ UNVERIFIED |
| KMKeicher Metal Arts Inc | Cairo | NY | — | ◇ UNVERIFIED |
| KPKemp Properties, LLC | Warren | MI | — | ◇ UNVERIFIED |
| KCKendra Construction Service INC | Bakersfield | CA | — | ◇ UNVERIFIED |
| KGKen Garner Manufacturing | Chattanooga | TN | — | ◇ UNVERIFIED |
| KGKen Garner Manufacturing - Rho, INC. | Rural Hall | NC | — | ◇ UNVERIFIED |
| KGKen Garner Manufacturing Vto, INC. | Victoria | TX | — | ◇ UNVERIFIED |
| KMKen Miller Supply of West Virginia, INC | Marietta | OH | — | ◇ UNVERIFIED |
| KFKennedy Fabricating | Splendora | TX | — | ◇ UNVERIFIED |
| KFKennedy Fabricating | Splendora | TX | — | ◇ UNVERIFIED |
| KMKent Manufacturing | Venice | FL | — | ◇ UNVERIFIED |
| KRKeto Rpm Services INC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| KGKevin Gonzalez Investment Group LLC | Hesperia | CA | — | ◇ UNVERIFIED |
| KBKeystone Boiler Works, INC. | Pottstown | PA | — | ◇ UNVERIFIED |
| KMKeystone Machine Works | Sand Springs | OK | — | ◇ UNVERIFIED |
| KSKff Supply, INC. | Centralia | IL | — | ◇ UNVERIFIED |
| KMKiewit Massman Construction | North Little Rock | AR | — | ◇ UNVERIFIED |
| KPKilgore Plant | Kilgore | TX | — | ◇ UNVERIFIED |
| KMKincaid Manufacturing INC. | Verona | PA | — | ◇ UNVERIFIED |
 Kinetic Systems, INC. | Frederick | MD | — | ◇ UNVERIFIED |
| KVKings Valley Industries INC | Madera | CA | — | ◇ UNVERIFIED |
| KTKing Tool Company | Longview | TX | — | ◇ UNVERIFIED |
| KWKing Wire Partition | Los Angeles | CA | — | ◇ UNVERIFIED |
| KMKinksbridge Metal CO | Carrollton | GA | — | ◇ UNVERIFIED |
| KSKinsley Steel INC. | Richmond | VA | — | ◇ UNVERIFIED |
| KCKinton Carbide, INC. | Export | PA | — | ◇ UNVERIFIED |
| KCKisner Corporation | Raleigh | NC | — | ◇ UNVERIFIED |
| KFKistler Fabricating | Warren | OH | — | ◇ UNVERIFIED |
| KWKiwi's Welding & Repair, Inc. | Boise | ID | — | ◇ UNVERIFIED |
| KWKJC Welding LLC | Falcon | MO | — | ◇ UNVERIFIED |
| KJK & J Steel INC | Washington | UT | — | ◇ UNVERIFIED |
| KKK & K Supply | Lubbock | TX | — | ◇ UNVERIFIED |
| KMK & M Rebar Inc. | Vancouver | WA | — | ◇ UNVERIFIED |
| KFKMS Fabrication LLC | Minerva | OH | — | ◇ UNVERIFIED |
 Knoxville Sheet Metal Works INC Dba Steel Plate Fa | Knoxville | TN | — | ◇ UNVERIFIED |
| KWKoenig Welding Services, LTD. | Wharton | TX | — | ◇ UNVERIFIED |
| KIKolemba Industries, INC. | Gallatin | TN | — | ◇ UNVERIFIED |
| KWKoski Welding INC | Baraga | MI | — | ◇ UNVERIFIED |
| KIKrimes Industrial and Mechanical INC. | Ephrata | PA | — | ◇ UNVERIFIED |
| KMK&s Metals INC. | Kennett Square | PA | — | ◇ UNVERIFIED |
| KIKsq Incorporated | Winfield | KS | — | ◇ UNVERIFIED |
| KSKta Services | Hallettsville | TX | — | ◇ UNVERIFIED |
| KMKumi Manufacturing Alabama LLC | Vanport | PA | — | ◇ UNVERIFIED |
| KDKurt Damron's Undercover Motorsports, Inc. | Morriston | FL | — | ◇ UNVERIFIED |
| KVK V Weld, INC. | Baytown | TX | — | ◇ UNVERIFIED |
| KLKwf LLC | Griswold | IA | — | ◇ UNVERIFIED |
| KLKwikset Locks | Bristow | OK | — | ◇ UNVERIFIED |
| KFKWX Fabrication & Welding LLC | Roll | AZ | — | ◇ UNVERIFIED |
 L3harris Maritime Services INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| LILabcraft, INC. | Waterville | OH | — | ◇ UNVERIFIED |
| LCLaBudde Creek Fabrication LLC | Elkhart Lake | WI | — | ◇ UNVERIFIED |
| LAL a Burnhart INC | Brighton | MI | — | ◇ UNVERIFIED |
| LFLA Fence Craft Inc | Rosemead | CA | — | ◇ UNVERIFIED |
| LGLa Gard INC | Torrance | CA | — | ◇ UNVERIFIED |
| LALake Area Equipment Maintenance, INC. | Lake Charles | LA | — | ◇ UNVERIFIED |
| LBLake Building Products INC | Akron | OH | — | ◇ UNVERIFIED |
| LBLake Building Products INC | Solon | OH | — | ◇ UNVERIFIED |
| LBLake Building Products, INC. | Mentor | OH | — | ◇ UNVERIFIED |
| LELake Erie Ship Repair and Fabrication, LLC. | Ashtabula | OH | — | ◇ UNVERIFIED |
| LCLakeland CO of Barron County INC | Cumberland | WI | — | ◇ UNVERIFIED |
| LSLakeside Steel & Mfg. Co. | Kenosha | WI | — | ◇ UNVERIFIED |
| LLLa Limited | Albuquerque | NM | — | ◇ UNVERIFIED |
| LCLally Column CORP | Raynham | MA | — | ◇ UNVERIFIED |
| LCLally Column CORP | Taunton | MA | — | ◇ UNVERIFIED |
| LILambert's INC | Fredonia | KS | — | ◇ UNVERIFIED |
| LCLane Custom Metal, INC. | Lafayette | LA | — | ◇ UNVERIFIED |
| LSLane Steel Fabricators, INC. | Chattanooga | TN | — | ◇ UNVERIFIED |
| LELaptalo Enterprises, INC. | San Jose | CA | — | ◇ UNVERIFIED |
| LSLarson Steel Products, LLC | Bedford Park | IL | — | ◇ UNVERIFIED |
| LFLasco Fittings, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| LCLas Cruces Machine INC. | Mesilla Park | NM | — | ◇ UNVERIFIED |
| LCLaser Center Corporation | Bensenville | IL | — | ◇ UNVERIFIED |
