| IBInnovation By Degro INC | Coto Laurel | PR | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| IMInnovations Manufacturing INC | Denver | CO | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
 International Door, INC. | North Kingstown | RI | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| IIInternational Impact Building Products LLC | West Palm Bch | FL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| IIIntigral, INC. | Cleveland | OH | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| ISIsland Screen INC. | Waipahu | HI | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| ISIsland Style Windows and Doors, Inc. | Naples | FL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JIJada INC | Grass Valley | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JSJansen Shutters & Specialties | Venice | FL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JHJeld-wen Holding, INC. | Venice | FL | Wood Product Manufacturing321918 | — | ◇ UNVERIFIED |
| JMJ & M Precision Sheetmetal | Cotati | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JCJohnson Contracting Solutions INC | Portland | OR | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JIJ&s Innovations, LLC | White Bear Lake | MN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JWJs West and Companies | Modesto | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| JWJw Window Components INC D/b/a Ritescreen | Elizabethton | TN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KMKairos Mfg INC Dba Architectural Iron Works | San Luis Obispo | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KDKalmont Distributors INC | Kalispell | MT | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KCKawneer Company INC | Riverside | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KCKawneer Company INC. | Hanover | MD | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KCKawneer Company, INC. | Roselle | IL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KBK Building Components INC | Hibbing | MN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KBKelley Bros LLC | De Ruyter | NY | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KGKodiak Gypsum Mountain States, LLC | Carrollton | TX | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| KFKt Fabrication INC | Chandler | AZ | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LILaforce, INC. | Vernon Hills | IL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LALake Air Metal Products INC | Coon Rapids | MN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LELang Exterior, INC. | Chicago | IL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LPLci Plant 119 | Bristol | IN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LMLeonard Metal Fabricators, Inc | Pearl | MS | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LILif Industries, INC. | Port Washington | NY | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LILindan Industries LLC | Hamilton | OH | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LILindan Industries LLC | Cincinnati | OH | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LWLindsay Windows South LLC | Cumming | GA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LMLin-ian Metals (guam) CORP | Tamuning | GU | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
 Lippert Components Manufacturing, INC. | Double Springs | AL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LLL & L Louvers INC | Riverside | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LDLmr Doors & Windows, INC. | Quebradillas | PR | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LSLobato Studio LLC | New Braunfels | TX | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LWLockheed Window CORP | South Easton | MA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LWLockheed Window CORP. | Pascoag | RI | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LILur INC | Pomona | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| LLLuxView, LLC | Nashville | TN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MCMac Cal CO INC | San Jose | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MWMalibu Window and Door | South El Monte | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MWManko Window Systems, INC. | Manhattan | KS | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MMMantua Manufacturing CO. | Tampa | FL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MCMason Corporation | Birmingham | AL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MDMasonite Door Corporation | Richmond | IN | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MSMastercare Shutter Corporation | Hobe Sound | FL | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| MPMastercore Products | San Marcos | CA | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
