| GIGuifarro Iron Work Corporation | Huntington Station | NY | — | ◇ UNVERIFIED |
| GCGulf Coast Alloy Welding, INC. | Humble | TX | — | ◇ UNVERIFIED |
| GMGulf Marine Fabricators, L.p. | Ingleside | TX | — | ◇ UNVERIFIED |
| GSGulf States Fabrication INC. | Laurel | MS | — | ◇ UNVERIFIED |
| GMGuyan Machinery CO. | Chapmanville | WV | — | ◇ UNVERIFIED |
| GWG W Heineke CO INC | El Centro | CA | — | ◇ UNVERIFIED |
| HIHaala Industries INC | Sleepy Eye | MN | — | ◇ UNVERIFIED |
| HSHaberle Steel INC. | Delano | PA | — | ◇ UNVERIFIED |
| HIHackney INC | West Memphis | AR | — | ◇ UNVERIFIED |
| HFH.a. Fabricators , INC. | North Logan | UT | — | ◇ UNVERIFIED |
| HFHahn Fabrication and Development, LLC | Forestville | NY | — | ◇ UNVERIFIED |
| HFHaines Fabrication & Machine, LLC | Selbyville | DE | — | ◇ UNVERIFIED |
| HUHalfen Usa, INC. | Converse | TX | — | ◇ UNVERIFIED |
| HMHallwood Modular Buildings LLC | Shreveport | LA | — | ◇ UNVERIFIED |
| HSHambric Steel & Fabrication | Albany | GA | — | ◇ UNVERIFIED |
 Hamilton Iron Works INC. | Woodbridge | VA | — | ◇ UNVERIFIED |
| Hamilton Iron Works, INC. | Torrance | CA | — | ◇ UNVERIFIED |
| HMHammersmith Mfg. & Sls | Horton | KS | — | ◇ UNVERIFIED |
| HIHansford Industries, INC. | Sacramento | CA | — | ◇ UNVERIFIED |
| HEHarbor Enterprises LLC. | Thomasville | GA | — | ◇ UNVERIFIED |
| HOHarbor Ornamental, INC. | Torrance | CA | — | ◇ UNVERIFIED |
| HRHarding Real Estate Holdings, LLC | Santa Ana | CA | — | ◇ UNVERIFIED |
 Hardric Laboratories | Waltham | MA | — | ◇ UNVERIFIED |
| HWHard Way Enterprises, Inc. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| HSHarliss Specialties Corporation | Westmoreland City | PA | — | ◇ UNVERIFIED |
| HRHarmac Rebar & Steel CORP | Fryeburg | ME | — | ◇ UNVERIFIED |
| HIHarmon's Ironworks and Fabrication LLC | Bowdon | GA | — | ◇ UNVERIFIED |
| HRHarris/arizona Rebar INC. (dba Harris Rebar Southern California) | Pomona | CA | — | ◇ UNVERIFIED |
| HRHarris Rebar Fresno INC | Fresno | CA | — | ◇ UNVERIFIED |
| HRHarris Rebar North Carolina INC | Catawba | SC | — | ◇ UNVERIFIED |
| HGHarry Gordon Steel Company | Winchester | KY | — | ◇ UNVERIFIED |
| HMHarshman Machine & Tool CO. | Saint Joseph | MO | — | ◇ UNVERIFIED |
| HMHart Mechanical & Electrical Contractors, INC | Perkasie | PA | — | ◇ UNVERIFIED |
| HIHaseltine Industrial Engravers INC | Mountain View | CA | — | ◇ UNVERIFIED |
| HLHassett LLC Dba Roettger Welding | Stillwater | MN | — | ◇ UNVERIFIED |
| HIHaulmark Industries INC | El Mirage | AZ | — | ◇ UNVERIFIED |
| HSHawe Steel Design | Butte | MT | — | ◇ UNVERIFIED |
| HWHawk Welding & Fabrication Company | Fort Worth | TX | — | ◇ UNVERIFIED |
| HJH.c Jeffries Tower Company, INC. | Porter | TX | — | ◇ UNVERIFIED |
| HDH & D Specialties INC | Knoxville | AR | — | ◇ UNVERIFIED |
| HSHd Supply Construction Supply LTD | Gilbert | AZ | — | ◇ UNVERIFIED |
| HRHeader Reinforcement CORP. | Fountain Valley | CA | — | ◇ UNVERIFIED |
| HAHeart Aerospace | El Segundo | CA | — | ◇ UNVERIFIED |
| HMHeartland Metal Sales, LLC | Marion | IL | — | ◇ UNVERIFIED |
| HTHeat Transfer Specialists of Louisiana, INC. | Baton Rouge | LA | — | ◇ UNVERIFIED |
| HLHeavy & Light Welding/Fabrication, Inc. | Bend | OR | — | ◇ UNVERIFIED |
| HLHeavy Line Fabrication | Anna | TX | — | ◇ UNVERIFIED |
| HMHeavy Metal Corporation | Cranston | RI | — | ◇ UNVERIFIED |
| HMHeavy Metal Fabrication | Colorado Springs | CO | — | ◇ UNVERIFIED |
| HSHeavy Stone Rings LLC | Orem | UT | — | ◇ UNVERIFIED |
| HMHec Manufacturing, INC. | Bardstown | KY | — | ◇ UNVERIFIED |
| HSHeintz Steel and Manufacturing Company | Saint Louis | MO | — | ◇ UNVERIFIED |
| HIHelser Industries of Nc | Sharpsburg | NC | — | ◇ UNVERIFIED |
| HFHenderson Fabrication | San Antonio | TX | — | ◇ UNVERIFIED |
| HWHenderson Welding, INC. | Chicago | IL | — | ◇ UNVERIFIED |
| HAHenry and Sons Construction | New Braunfels | TX | — | ◇ UNVERIFIED |
| HPHercules Project Company LLC | Palmetto | FL | — | ◇ UNVERIFIED |
| HSHercules Steel Company, Incorporated | Richlands | NC | — | ◇ UNVERIFIED |
| HCHeritage Custom Fabricators | Princeton | IN | — | ◇ UNVERIFIED |
| HBHerman Binz & Sons Iron Works | Little Rock | AR | — | ◇ UNVERIFIED |
| HRHerman Reeves Sheet Metal, INC. | Gastonia | NC | — | ◇ UNVERIFIED |
| HSHerman Steel Inc | Slatington | PA | — | ◇ UNVERIFIED |
| HSHermitage Steel, Incorporated | Richmond | VA | — | ◇ UNVERIFIED |
| HFHerrera Fabricating INC. | Houston | TX | — | ◇ UNVERIFIED |
| HCHerrick CORP Dba San Bernardino Steel INC | San Bernardino | CA | — | ◇ UNVERIFIED |
| HHH Hirschberger CO INC | Portland | OR | — | ◇ UNVERIFIED |
| HIHigh Industries INC | Lancaster | PA | — | ◇ UNVERIFIED |
| HPHigh Pressure Gas Cylndr. | Longview | TX | — | ◇ UNVERIFIED |
| HSHighway Systems, INC. | Ocala | FL | — | ◇ UNVERIFIED |
| HRHill Rebar INC | Corona | CA | — | ◇ UNVERIFIED |
| HCHillside Custom Machining & Fabrication, LLC | Denver | PA | — | ◇ UNVERIFIED |
| HWHinojosas Welding Service LLC | Alice | TX | — | ◇ UNVERIFIED |
| HEHirschfeld Energy Systems, LLC | San Angelo | TX | — | ◇ UNVERIFIED |
| HIHirschfeld Industries | San Angelo | TX | — | ◇ UNVERIFIED |
| HIHirschfeld Industries Group LP | Abilene | TX | — | ◇ UNVERIFIED |
| HIHirschfeld Industries LP | San Angelo | TX | — | ◇ UNVERIFIED |
 Hi-Tech Metals, Inc. | Maspeth | NY | — | ◇ UNVERIFIED |
| HMHitec Metal Fabrication CORP. | Anaheim | CA | — | ◇ UNVERIFIED |
| HIHme INC | Topeka | KS | — | ◇ UNVERIFIED |
| HIHme, INC. | Laramie | WY | — | ◇ UNVERIFIED |
| HIHmt, INC. | Blackwell | OK | — | ◇ UNVERIFIED |
| HWHofmeister Welding & Fabricating, INC. | Griggsville | IL | — | ◇ UNVERIFIED |
| HAHof's and Yates Rebar INC Dba H and Y Rebar INC | Long Beach | CA | — | ◇ UNVERIFIED |
| HFHogan Fab INC | Portland | OR | — | ◇ UNVERIFIED |
| HMHogan Manufacturing | Escalon | CA | — | ◇ UNVERIFIED |
| HPHogan Products & Services LLC | Pulaski | PA | — | ◇ UNVERIFIED |
| HMHolland Manufacturing Co., INC. | Dothan | AL | — | ◇ UNVERIFIED |
| HSHolley Steel, Inc. | Elmore | AL | — | ◇ UNVERIFIED |
| HRHolt Repair & Manufacturing INC | Holt | CA | — | ◇ UNVERIFIED |
| HMHomeland Metal Products | Bossier City | LA | — | ◇ UNVERIFIED |
| HCHonor Companies LLC | Sapulpa | OK | — | ◇ UNVERIFIED |
| HIHooley, INC. | New Orleans | LA | — | ◇ UNVERIFIED |
| HSHorseshoe Steel Erectors | Austin | TX | — | ◇ UNVERIFIED |
| HRHotel & Restaurant Supply INC. | Savannah | TN | — | ◇ UNVERIFIED |
| HFHouston Fab Truck Rigging INC. | Houston | TX | — | ◇ UNVERIFIED |
| HSHoward Structural Steel, Inc. | Saginaw | MI | — | ◇ UNVERIFIED |
| HSHowser Steel INC | Portland | OR | — | ◇ UNVERIFIED |
| HRH & R Industrial | Kokomo | IN | — | ◇ UNVERIFIED |
| HIHrke, INC. | Fort Worth | TX | — | ◇ UNVERIFIED |
| HIHsc Investments, INC. | Colfax | NC | — | ◇ UNVERIFIED |
