| Continental Steel Works, Inc. | Butte | MT | $0 |
| Control Dynamics Inc. | Everett | WA | $0 |
| Cross Machine, Inc. | Berlin | NH | Subcontractor |
| Crystal Steel Fabricators Inc. | Delmar | DE | Subcontractor |
| Custom Engineering Co. | Erie | PA | Subcontractor |
| Dalles Iron Works, LLC | The Dalles | OR | $0 |
| Darok Steel Inc. | Arecibo | PR | $0 |
| Dave Steel Co. Inc. | Asheville | NC | Subcontractor |
| DBS Manufacturing, Incorporated | Atlanta | GA | Subcontractor |
| D & D Welding & Fabrication Inc. | Lewiston | UT | Subcontractor |
| Deines-nitz Solutions, LLC | Erie | IL | Subcontractor |
| Design Assistance Construction Systems Inc. | Portsmouth | VA | $0 |
| Dicke Tool Co. | Downers Grove | IL | $0 |
| Doherty Steel, Inc. | Paola | KS | Subcontractor |
| Doing Steel Inc. | Springfield | MO | Subcontractor |
| Door Engineering And Manufacturing, LLC | Mankato | MN | Subcontractor |
| Drake-williams Steel Inc. | Omaha | NE | Subcontractor |
| D & T Steel, Inc. | Pelion | SC | Subcontractor |
| Duggan Manufacturing LLC | Shelby Township | MI | Subcontractor |
| Earthquake Protection Systems | Vallejo | CA | $0 |
| E & H Steel Corporation, A Close Corporation | Midland City | AL | Subcontractor |
| Ellis Manufacturing Co. Inc. | Oklahoma City | OK | $0 |
| Emseal Joint Systems, Ltd. | Westborough | MA | $0 |
| Enviromotive, Inc. | Anaheim | CA | $0 |
| Expanded Solutions LLC | Oklahoma City | OK | Subcontractor |
| Expo Power Systems, Inc. | Montclair | CA | $0 |
| Extreme Steel Inc. | Winchester | VA | Subcontractor |
| Fabarc Steel Supply Inc. | Oxford | AL | Subcontractor |
| Fabricon, Inc. | Temple | PA | Subcontractor |
| Federal Prison Industries, Inc. | Otisville | NY | $0 |
| Film Speed LLC | Covington | GA | Subcontractor |
| FLX Technologies, LLC | Fort Worth | TX | Subcontractor |
| Forestville Welding And Iron Works, Inc. | Upper Marlboro | MD | Subcontractor |
| Fought & Company, Inc. | Tigard | OR | Subcontractor |
| Freeberg Industrial Fabrication LLC | Escondido | CA | Subcontractor |
| G2 Automated Technologies, LLC | Dallas | TX | $0 |
| Gamlet Inc. | York | PA | Subcontractor |
| Garzo, Inc. | Waller | TX | $0 |
| Gator Dock & Marine LLC | Sanford | FL | $0 |
| GBC CSG LLC | Cub Run | KY | $0 |
| General Atomics | Shannon | MS | Subcontractor |
| Gibson Industrial, Inc. | Richmond | VA | Subcontractor |
| G.N.B., Inc. | Casper | WY | $0 |
| Graber Manufacturing, Inc. | Waunakee | WI | $0 |
| Great American Rolling, Inc. | Downey | CA | $0 |
| Greer Tank LLC | Anchorage | AK | Subcontractor |
| Gridiron Steel Inc. | Dillsburg | PA | Subcontractor |
| Gt Grandstands, Inc. | Plant City | FL | Subcontractor |
| Harris Rebar South Pacific Inc. | Kapolei | HI | Subcontractor |
| Hector's Welding, Inc. | North Pole | AK | Subcontractor |
| Heimaster Metal Works, Inc. | Lakeside | CA | Subcontractor |
| Heritage Fabrication Inc. | Sedalia | MO | $0 |
| High Steel Structures LLC | Lancaster | PA | Subcontractor |
| Hme Inc. | Topeka | KS | Subcontractor |
| Howard Steel LLC | Davenport | IA | $0 |
| Hydrafab Northwest, Inc. | Spokane Valley | WA | $0 |
| Intermoor Inc. | Houston | TX | Subcontractor |
| International Welding & Fabrication Inc. | Moss Point | MS | Subcontractor |
| Iron Brothers Welding And Fabrication LLC | Hephzibah | GA | $0 |
| Jabez Holdings Inc. | Orting | WA | Subcontractor |
| Jacksonville Steel Inc. | Beebe | AR | Subcontractor |
| Jacobs Precision Welding, Inc. | Lead | SD | $0 |
| JBC Steel Products, LLC | Dallas | TX | Subcontractor |
| J&B Fabricators LLC | Auburn | WA | Subcontractor |
| J.b. Ventures, Inc. | Tucson | AZ | Subcontractor |
| Jc Macelroy Co. Inc. | Piscataway | NJ | Subcontractor |
| Jim-n-i, Inc. | Lewistown | MT | Subcontractor |
| Joly's Metal Works, Inc. | New Orleans | LA | $0 |
| Jones Valley Fabrication LLC | Oneonta | AL | Subcontractor |
| JPW Structural Contracting Inc. | Syracuse | NY | Subcontractor |
| Js Fabrications Inc. | Fremont | OH | Subcontractor |
| Kansas City Structural Steel, Inc. | Kansas City | MO | Subcontractor |
| Kat Industries Inc. | Oklahoma City | OK | $0 |
| KCB Towers, Inc. | Banning | CA | Subcontractor |
| Kenal Services Corp. | Watertown | NY | $0 |
| Kw Steel Structures LLC | Attleboro | MA | Subcontractor |
| Lapeyre Stair, Inc. | New Orleans | LA | $0 |
| Laser Craft Technologies, Inc. | Gainesville | GA | $0 |
| Lebus International, Inc. | Longview | TX | Subcontractor |
| Lightning Eliminators & Consultants, Inc. | Boulder | CO | Subcontractor |
| Lindon Group, Inc. | Rumford | RI | $0 |
| Linita Design & MFG. Corp. | Lackawanna | NY | $0 |
| Liphart Steel Co. Inc. | Richmond | VA | Subcontractor |
| Macuch Steel Products, Inc. | Augusta | GA | $0 |
| Madlyn Metal Fab LLC | Washougal | WA | Subcontractor |
| Magnolia Steel Co. Inc. | Meridian | MS | Subcontractor |
| Magnum Towers, Inc. | Sacramento | CA | Subcontractor |
| Martin's Metal Fabrication & Welding, Inc. | Vacaville | CA | Subcontractor |
| Martin Steel Fabrication, Inc. | Mascoutah | IL | $0 |
| Material Storage Systems Inc. | Humble | TX | Subcontractor |
| Maverick Aerospace LLC | City Of Industry | CA | Subcontractor |
| Metals And Alloys Co. LLC | Lexington | SC | $0 |
| Metals Inc. | Bedford | OH | Subcontractor |
| Metal-weld Specialties, Inc. | Peoria | AZ | Subcontractor |
| Metro Steel & Pipe Supply, Inc. | Tavares | FL | $0 |
| Mid-city Steel LLC | La Crosse | WI | $0 |
| Midwest Steel Works, Inc. | Lincoln | NE | Subcontractor |
| "mil, LTD" | Houston | TX | Subcontractor |
| Monarch Machine & Tool Co. Inc. | Pasco | WA | $0 |
| Niik Steel Inc. | Nanaimo | BC | Subcontractor |
