| KMKiewit Massman Construction | North Little Rock | AR | — | ◇ UNVERIFIED |
| KSKimes Steel | New Haven | WV | — | ◇ UNVERIFIED |
| KMKincaid Manufacturing INC. | Verona | PA | — | ◇ UNVERIFIED |
| KSKing Steel INC | Lawrenceville | GA | — | ◇ UNVERIFIED |
| KVKings Valley Industries INC | Madera | CA | — | ◇ UNVERIFIED |
| KWKing Wire Partition | Los Angeles | CA | — | ◇ UNVERIFIED |
| KSKinsley Steel INC. | Richmond | VA | — | ◇ UNVERIFIED |
| KFKistler Fabricating | Warren | OH | — | ◇ UNVERIFIED |
| KWKiwi's Welding & Repair, Inc. | Boise | ID | — | ◇ UNVERIFIED |
| KJK & J Steel INC | Washington | UT | — | ◇ UNVERIFIED |
| KIKline Iron & Steel CO INC | Columbia | SC | — | ◇ UNVERIFIED |
| KIKline Iron & Steel Co., INC. | West Columbia | SC | — | ◇ UNVERIFIED |
| KIKlute INC | York | NE | — | ◇ 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 |
| KMKoester Metals, INC. | Defiance | OH | — | ◇ UNVERIFIED |
| KCKonitz Construction INC | Tarpon Spgs | FL | — | ◇ UNVERIFIED |
| KPKonstant Products INC | Quincy | IL | — | ◇ UNVERIFIED |
| KIKrimes Industrial and Mechanical INC. | Ephrata | PA | — | ◇ UNVERIFIED |
| KBKrush Brau German Beer Garden | Kissimmee | FL | — | ◇ UNVERIFIED |
| KMK&s Metals INC. | Kennett Square | PA | — | ◇ UNVERIFIED |
| KSKta Services | Hallettsville | TX | — | ◇ UNVERIFIED |
| KDKurt Damron's Undercover Motorsports, Inc. | Morriston | FL | — | ◇ UNVERIFIED |
| KCKvf CO | Elk Grove Village | IL | — | ◇ UNVERIFIED |
| KVK V Weld, INC. | Baytown | TX | — | ◇ UNVERIFIED |
| KFKWX Fabrication & Welding LLC | Roll | AZ | — | ◇ UNVERIFIED |
| LILabcraft, INC. | Waterville | OH | — | ◇ UNVERIFIED |
| LCLaBudde Creek Fabrication LLC | Elkhart Lake | WI | — | ◇ UNVERIFIED |
| LFLA Fence Craft Inc | Rosemead | 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 |
| LCLake Cities Fabrication | Lewisville | TX | — | ◇ 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 |
| LSLarson Steel Products, LLC | Bedford Park | IL | — | ◇ UNVERIFIED |
| LCLas Cruces Machine INC. | Mesilla Park | NM | — | ◇ UNVERIFIED |
| LCLaser Center Corporation | Bensenville | IL | — | ◇ UNVERIFIED |
| LMLasertech Metal Works, INC. | Fayetteville | GA | — | ◇ UNVERIFIED |
| LWLawton Welding Company INC | Georgetown | MA | — | ◇ UNVERIFIED |
| LFL.b. Foster Company | Bedford | PA | — | ◇ UNVERIFIED |
| LSLb Steel, LLC | Harvey | IL | — | ◇ UNVERIFIED |
| LFL.d. Flecken INC. | Yaphank | NY | — | ◇ UNVERIFIED |
| LSLeak Sealers INC. D/b/a Phoenix Precision Machine | Silsbee | TX | — | ◇ UNVERIFIED |
| LILedmark Industries LLC | Lakewood | NJ | — | ◇ UNVERIFIED |
| LFLee Fabricators, INC. | Silverdale | WA | — | ◇ UNVERIFIED |
| LFLee Fabricators, LLC | Temple | GA | — | ◇ UNVERIFIED |
| LRLee R Kelly | Oregon City | OR | — | ◇ UNVERIFIED |
| LILee's Imperial Welding INC | Fremont | CA | — | ◇ UNVERIFIED |
| LFLegacy Fence Fabrication | Lemon Grove | CA | — | ◇ UNVERIFIED |
| LMLegacy Metal Properties, LLC | Almont | MI | — | ◇ UNVERIFIED |
| LMLegacy Metal Services, Inc. | Imlay City | MI | — | ◇ UNVERIFIED |
| LILegion Industrial Equipment | Quincy | IL | — | ◇ UNVERIFIED |
| LMLegris Mfg. CO INC | Kankakee | IL | — | ◇ UNVERIFIED |
| LSLehigh Services, INC. | Macungie | PA | — | ◇ UNVERIFIED |
| LMLehman Manufacturing | Fresno | CA | — | ◇ UNVERIFIED |
| LSLejeune Steel CO | Barronett | WI | — | ◇ UNVERIFIED |
| LSLejeune Steel Company | Minneapolis | MN | — | ◇ UNVERIFIED |
| LSLemon Street, LLC | Orange | CA | — | ◇ UNVERIFIED |
| LSLenex Steel | Indianapolis | IN | — | ◇ UNVERIFIED |
| LSLenex Steel Company | Indianapolis | IN | — | ◇ UNVERIFIED |
| LALennox Aes Holdings LLC | Tallassee | AL | — | ◇ UNVERIFIED |
| LALennox Aes - Weatherford Tx | Weatherford | TX | — | ◇ UNVERIFIED |
| LTLetourneau Technologies, INC | Vicksburg | MS | — | ◇ UNVERIFIED |
| LLeviat | Converse | TX | — | ◇ UNVERIFIED |
| LSLeviat San Antonio Facility | San Antonio | TX | — | ◇ UNVERIFIED |
| LSLewis Steel INC | Terra Bella | CA | — | ◇ UNVERIFIED |
| LILexicon, INC. | Blytheville | AR | — | ◇ UNVERIFIED |
| LILexicon, INC. Dba Prospect Steel Company | Blytheville | AR | — | ◇ UNVERIFIED |
| LHL & H Iron INC Dba Lartech | San Jose | CA | — | ◇ UNVERIFIED |
| LNLiberal New Iron and Metal | Liberal | KS | — | ◇ UNVERIFIED |
| LFLiberty Fabricators INC | Flint | MI | — | ◇ UNVERIFIED |
 Liberty Welding & Iron Works CO. | Metairie | LA | — | ◇ UNVERIFIED |
| LTLife Time Gate | Tualatin | OR | — | ◇ UNVERIFIED |
| LGLight Gauge Solutions, Inc. | Arlington | TX | — | ◇ UNVERIFIED |
| LWLight's Welding Incorporated | Lititz | PA | — | ◇ UNVERIFIED |
| LSLincoln Steel Corporation | Lincoln | NE | — | ◇ UNVERIFIED |
| LPLinde Process Plants, INC. | Watford City | ND | — | ◇ UNVERIFIED |
| LTLindsay Transportation Solutions INC. | Rio Vista | CA | — | ◇ UNVERIFIED |
| LTLindsay Trnsprtn Solutions INC | Omaha | NE | — | ◇ UNVERIFIED |
| LILinton Industries, INC | Washington | NC | — | ◇ UNVERIFIED |
| LSLiphart Steel Company, INC. | Verona | VA | — | ◇ UNVERIFIED |
| LCLippert Compenents - Plant 120 | Burnsville | MS | — | ◇ UNVERIFIED |
 Lippert Components | Goshen | IN | — | ◇ UNVERIFIED |
| Lippert Components, INC. | Jackson Center | OH | — | ◇ UNVERIFIED |
| Lippert Components, INC. - Indiana Frame Division | Goshen | IN | — | ◇ UNVERIFIED |
| Lippert Components INC Plant 20 | Longview | TX | — | ◇ UNVERIFIED |
| Lippert Components Plant 151 | Kendallville | IN | — | ◇ UNVERIFIED |
| LCLippert Componets Plant 59 | Elkhart | IN | — | ◇ UNVERIFIED |
| LPLippert Plant 85 | Goshen | IN | — | ◇ UNVERIFIED |
