| GPGrayd 'a' Precision Metal Fabrications | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| GWGreater Wisconsin Sheet Metal, INC | Plymouth | WI | — | ◇ UNVERIFIED |
| GLGreat Lakes Manufacturing | Corry | PA | — | ◇ UNVERIFIED |
 Greenheck Fan CORP | Schofield | WI | — | ◇ UNVERIFIED |
| GMGreenwood Manufacturing INC. | Houston | TX | — | ◇ UNVERIFIED |
| GMGregory Metal Fabrication | Crandall | GA | — | ◇ UNVERIFIED |
| GZGreg Zimont | Panama City Beach | FL | — | ◇ UNVERIFIED |
| GVGSA Ventures LLC | Foley | AL | — | ◇ UNVERIFIED |
| GSGuch Sheet Metal and Ac INC | Stuart | FL | — | ◇ UNVERIFIED |
| GAGuernsey Architectural Solutions, INC. | Boca Raton | FL | — | ◇ UNVERIFIED |
| GCGulf Coast Signs of Sarasota | Sarasota | FL | — | ◇ UNVERIFIED |
| GCGulf Coast Supply & Manufacturing LLC | Sebring | FL | — | ◇ UNVERIFIED |
| GCGulf Coast Supply & Manufacturing, LLC | Montgomery | AL | — | ◇ UNVERIFIED |
| GMGutierrez Manufacturing INC | Santa Ana | CA | — | ◇ UNVERIFIED |
| GSGuttermans Supply Corporation of America | Portland | OR | — | ◇ UNVERIFIED |
| HSHaida Sheet Metal LLC | Battle Ground | WA | — | ◇ UNVERIFIED |
| HIHaimetal INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| HMHall's Mechanical Services LLC | Fieldale | VA | — | ◇ UNVERIFIED |
| HSHalls Sheet Metal Fabrication Inc | Galena | OH | — | ◇ UNVERIFIED |
| HWHamlin Welding and Fabricating LLC | Melbourne | FL | — | ◇ UNVERIFIED |
| HMHammersmith Metal Works | Springfield | MO | — | ◇ UNVERIFIED |
| HSHammond Sheet Metal | El Dorado Springs | MO | — | ◇ UNVERIFIED |
| HMH&H Metal Fabrication | St. Louis | MO | — | ◇ UNVERIFIED |
| HAH and H Metal Products, LLC | Savannah | TN | — | ◇ UNVERIFIED |
| HFHardy Frames INC | Huntington Beach | CA | — | ◇ UNVERIFIED |
| HTHarout Tool & Machine Corporation | Hackensack | NJ | — | ◇ UNVERIFIED |
| HMHarrison Machine Co/wesleyville Plt | Erie | PA | — | ◇ UNVERIFIED |
| HSHarris Sheet Metal CO. | Midland | MI | — | ◇ UNVERIFIED |
| HCHart & Cooley INC | Holland | MI | — | ◇ UNVERIFIED |
| HCHart & Cooley INC | Tucson | AZ | — | ◇ UNVERIFIED |
| HMHartzell Mfg CO INC (0857092018) | Miamisburg | OH | — | ◇ UNVERIFIED |
| HVHarvest Valley Specialties INC | Eugene | OR | — | ◇ UNVERIFIED |
| HIHarwell Industries | Oklahoma City | OK | — | ◇ UNVERIFIED |
| HFHawk Fabricators | Birmingham | AL | — | ◇ UNVERIFIED |
| HCHazleton Custom Metal Products INC. | Hazleton | PA | — | ◇ UNVERIFIED |
| HCH. C. Wade Sheet Metal Works | Martinsville | VA | — | ◇ UNVERIFIED |
| HFHdn F&a INC | Battle Creek | MI | — | ◇ UNVERIFIED |
| HFHeat Fab INC | Turners Falls | MA | — | ◇ UNVERIFIED |
 Helander Metal Spinning Company | Lombard | IL | — | ◇ UNVERIFIED |
| Helander Metal Spinning Company | Addison | IL | — | ◇ UNVERIFIED |
| HMHennemuth Metal Fabricators, INC. | Oakdale | PA | — | ◇ UNVERIFIED |
| HIHennig, INC. Marlin | Machesney Park | IL | — | ◇ UNVERIFIED |
| HSHercules Sheet Metal | Chalmette | LA | — | ◇ UNVERIFIED |
| HMHeritage Metal LLC | Tazewell | VA | — | ◇ UNVERIFIED |
| HSHg Solutions | Garland | TX | — | ◇ UNVERIFIED |
| HHH & H Metal Fabrication | Lawton | IA | — | ◇ UNVERIFIED |
| HSH&h Sheetmetal, INC. | Russellville | KY | — | ◇ UNVERIFIED |
| HBHicks Brothers Property LLC | Kalamazoo | MI | — | ◇ UNVERIFIED |
| HMHighland Machine | Oak Hill | WV | — | ◇ UNVERIFIED |
| HMHightower Metal Works | Houston | TX | — | ◇ UNVERIFIED |
| HMHighway Metal Services, INC. | Cleveland | OH | — | ◇ UNVERIFIED |
| HMHildebrandt Machine | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| HFHilgert Family Properties, LLC | Pomona | CA | — | ◇ UNVERIFIED |
| HSHillcrest Sheet Metal, INC. | Bakersfield | CA | — | ◇ UNVERIFIED |
| HMHill Mfg LLC | Santa Clara | CA | — | ◇ UNVERIFIED |
| HSHillsboro Sheet Metal, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| HFHi-tech Fab, INC. | Shelbyville | TN | — | ◇ UNVERIFIED |
| HFHi-tech Fabrication, INC. | Raleigh | NC | — | ◇ UNVERIFIED |
| HIHi-tech Industries of New York | Johnson City | NY | — | ◇ UNVERIFIED |
| HTHi Tech Industries of New York, INC. | Johnson City | NY | — | ◇ UNVERIFIED |
| HSHj Shotwell CO | Minneapolis | MN | — | ◇ UNVERIFIED |
| HKH & K Tool & Die INC. | Stevens Point | WI | — | ◇ UNVERIFIED |
| HWHm White INC | Detroit | MI | — | ◇ UNVERIFIED |
| HEHoffman Enclosures INC Dba Pentair Technical | Anoka | MN | — | ◇ UNVERIFIED |
| HMHoffman Manufacturing, INC. | Fogelsville | PA | — | ◇ UNVERIFIED |
| HHHojalateria Hipolito Rosa INC | Aguada | PR | — | ◇ UNVERIFIED |
| HMHolbrook Merrill Co# | Sunnyvale | CA | — | ◇ UNVERIFIED |
| HSHolliday Sheet Metal CO. | Tyler | TX | — | ◇ UNVERIFIED |
| HIHolly Industries INC | Hornick | IA | — | ◇ UNVERIFIED |
| HMHolmboe Manufacturing CO. | Oklahoma City | OK | — | ◇ UNVERIFIED |
| HIHoneywell International INC. | Tucson | AZ | — | ◇ UNVERIFIED |
| HTHon Tai CORP | Tamuning | GU | — | ◇ UNVERIFIED |
| HDHood Depot International INC | Deerfield Beach | FL | — | ◇ UNVERIFIED |
| HSHopewell Sheet Metal Manufacturing, LLC | Hagerstown | MD | — | ◇ UNVERIFIED |
| HSHorizon Sheet Metal, INC. | Springfield | MA | — | ◇ UNVERIFIED |
| HOHouse of Metal Enclosures Inc-house of Metal Enclosures INC | Hermann | MO | — | ◇ UNVERIFIED |
| HSHou-Tex Sheet Metal, Inc. | Houston | TX | — | ◇ UNVERIFIED |
| HIHRB Industries Corp. | Saint Charles | IL | — | ◇ UNVERIFIED |
| HSH&r Sheet Metal | Los Angeles | CA | — | ◇ UNVERIFIED |
| HAHs Alloy, LLC | Denham Springs | LA | — | ◇ UNVERIFIED |
| HIHsi INC. Dba Harvey Sheet Metal, INC. | North Little Rock | AR | — | ◇ UNVERIFIED |
| HMHsi Mechanical INC | Modesto | CA | — | ◇ UNVERIFIED |
| HMHsi Mechanical, INC. | Honolulu | HI | — | ◇ UNVERIFIED |
| HSH & S Metals INC. | Baytown | TX | — | ◇ UNVERIFIED |
| HHHueston Holdings LLC | Holland | OH | — | ◇ UNVERIFIED |
| HIHumanetics Ii, LTD. | Mcallen | TX | — | ◇ UNVERIFIED |
| HSHuskey Sheet Metal Company | Chattanooga | TN | — | ◇ UNVERIFIED |
| HMHVAC Metal Home LLC | Linden | NJ | — | ◇ UNVERIFIED |
| HMHw Metal Products INC | Tualatin | OR | — | ◇ UNVERIFIED |
| HAHyper Alloy INC | Roseville | MI | — | ◇ UNVERIFIED |
| ISIberia Sheet Metal, LLC | New Iberia | LA | — | ◇ UNVERIFIED |
| ISIdeal Steel, INC. | Springfield | OH | — | ◇ UNVERIFIED |
| ISIGH Steel Fabrication Inc. | Lebanon | IN | — | ◇ UNVERIFIED |
| IMIko Metals | Ennis | TX | — | ◇ UNVERIFIED |
| IIIlten's INC. | Cedar Rapids | IA | — | ◇ UNVERIFIED |
| IRImco Reinforced Plastics INC | Moorestown | NJ | — | ◇ UNVERIFIED |
| IEImpact Employment INC | Salt Lake City | UT | — | ◇ UNVERIFIED |
| IHImpakt Holdings LLC Dba Dmp | Burlingame | CA | — | ◇ UNVERIFIED |
| IMImperial Manufacturing Group USA INC. | Alton | IL | — | ◇ UNVERIFIED |
| IAImpulse Air, INC | Jacksonville | FL | — | ◇ UNVERIFIED |
