| School Equipment Inc. | Albuquerque | NM | $0 |
| School & Office Products Of Arkansas, Inc. | North Little Rock | AR | Subcontractor |
| Schrock Fence Company, Inc. | Uniontown | PA | $0 |
| Schwager Davis, Inc. | San Jose | CA | Subcontractor |
| Science Museum Oklahoma, Inc. | Oklahoma City | OK | $0 |
| Scott Fence, USA, LLC | Baton Rouge | LA | $0 |
| Scott Laboratory Solutions, LLC | Knoxville | TN | Subcontractor |
| Scott River Pump & Irrigation, Inc. | Fort Jones | CA | $0 |
| Seascape Designs | Wilmington | DE | $0 |
| Seegars Fence Company, Inc. Of Jacksonville | Jacksonville | NC | Subcontractor |
| Seegars Fence Company, Inc. Of New Hanover | Wilmington | NC | $0 |
| Seegars Fence Co. Of Greensboro, Inc. | Greensboro | NC | $0 |
| Select Fence & Guardrail, LLC | North Haven | CT | $0 |
| Senseer US Inc. | Maysville | NC | Subcontractor |
| Seraphims Construction | Lilongwe | | $0 |
| Serco Fencing, Inc. | Bloomfield | NM | $0 |
| Sfa Contracting LLC | Tucson | AZ | Subcontractor |
| Shadepro LLC | New Braunfels | TX | $0 |
| Shaffield Building Specialties, Inc. | Tallahassee | FL | Subcontractor |
| Shanahan Sound & Electronics, Inc. | Lowell | MA | $0 |
| Shelton Fire Protection Co. Inc. | Yorba Linda | CA | Subcontractor |
| S & H Enterprises Inc. | Queensbury | NY | Subcontractor |
| Siberton Fence Sales, Inc. | Attalla | AL | $0 |
| Signs Unlimited, Inc. | Alexandria | VA | $0 |
| Silicon Valley Mechanical, Inc. | San Jose | CA | $0 |
| Simpson Construction LLC | Bartlett | TN | $0 |
| S & J Fencing, LLC | Tenino | WA | Subcontractor |
| Skold Door & Floor Company Inc. | Des Moines | IA | Subcontractor |
| Skyrealm, LLC | Livermore | CO | $0 |
| Smith Industries, Inc. | Clearwater | FL | Subcontractor |
| Smoke Guard, Inc. | Dallas | TX | Subcontractor |
| Snell Crane Service, Inc. | Olympia | WA | Subcontractor |
| Socal Pacific Construction, Corp. | Murrieta | CA | Subcontractor |
| Solar Impact Inc. | Gainesville | FL | Subcontractor |
| Solar Services, Inc. | Virginia Beach | VA | $0 |
| Solid Construction Of Montana Inc. | Hamilton | MT | $0 |
| Solid Security, LLC | Saint Augustine | FL | $0 |
| Soliman Amr | Ann Arbor | MI | $0 |
| Southeast Door Co. Inc. | Savannah | GA | Subcontractor |
| South East Fence Co. Inc. | Lakeville | MA | $0 |
| Southeast Turf, LLC | Catawba | NC | Subcontractor |
| Southern Aquatics, Inc. | Ponte Vedra | FL | Subcontractor |
| Southern California Flagpole Co. Inc. | Los Angeles | CA | $0 |
| Southern Concrete & Construction, Inc. | Ravenel | SC | Subcontractor |
| Southern Maryland Crane Rental, Inc. | White Plains | MD | Subcontractor |
| Southern Shoring Solutions LLC | Bishop | GA | Subcontractor |
| South Sound Fencing LLC | Lakewood | WA | Subcontractor |
| Southwest Fire Protection Inc. | Payson | AZ | Subcontractor |
| Spacecon Specialty Contractors LLC | Wheat Ridge | CO | Subcontractor |
| Specialty Crane & Rigging Corporation | Goleta | CA | Subcontractor |
| Specified Architectural Systems, Inc. | Tampa | FL | Subcontractor |
| Speedshelf Systems, Inc. | Southfield | MI | $0 |
| Spencer Paving Company, Inc. | Spencer | NY | $0 |
| Spencer & Virnoche, Inc. | Clay | NY | Subcontractor |
| Springfield Sealing Service, Inc. | Springfield | MO | Subcontractor |
| Sro Associates, Inc. | San Antonio | TX | $0 |
| Stagecraft Industries, Inc. | Portland | OR | $0 |
| Standby Systems Inc. | Minneapolis | MN | $0 |
| State-line Products Of South Florida, Inc. | Pompano Beach | FL | Subcontractor |
| Statewide Fence Contractors Limited Liability Company | Garwood | NJ | $0 |
| Steadfast Structures Inc. | Tucson | AZ | $0 |
| Steelock Corporation | Denver | CO | Subcontractor |
| Sterling Corporate Custom Elevator Interiors | Ontario | CA | Subcontractor |
| Sterling Crane LLC | Thornton | CO | $0 |
| Sterling Industrial LLC | Evansville | IN | Subcontractor |
| Stewart Felty, Inc. | Keswick | VA | $0 |
| Stone Enterprises, LLC | Tomball | TX | $0 |
| Stoner Door & Dock Corporation | Topeka | KS | Subcontractor |
| Stonington Services, LLC | Gales Ferry | CT | Subcontractor |
| Stosich Inc. | Lima | MT | $0 |
| Stratacor, Inc. | Novato | CA | $0 |
| Strategic Capital Advisors LLC | Weston | FL | $0 |
| Strut Services Group Inc. | Birmingham | AL | Subcontractor |
| Stumbaugh & Associates, Inc. | Burbank | CA | Subcontractor |
| Subsurface Constructors Incorporated | Saint Louis | MO | Subcontractor |
| Subsurface Technologies, Inc. | Rock Tavern | NY | $0 |
| Summers Fire Sprinklers, Inc. | Boca Raton | FL | Subcontractor |
| Summit Fence Company, LLC | Olympia | WA | Subcontractor |
| Sunbelt Pools, Inc. | Dallas | TX | $0 |
| Sunshield Energy Control Systems, LLC | New Rochelle | NY | $0 |
| Sunstone Building Specialties, Inc. | Las Vegas | NV | Subcontractor |
| Sunwest Gunite Co. | Albuquerque | NM | $0 |
| Superior Fence & Construction, Inc. | Portland | OR | Subcontractor |
| Superior Fence LLC | Klamath Falls | OR | $0 |
| Superior Fence Systems, Inc. | Glasgow | KY | $0 |
| Superior Insulation Co. LLC | Huntingburg | IN | Subcontractor |
| Superior Paving Company, Inc. | Corona | CA | Subcontractor |
| Superior Services, Inc. | Elko | NV | $0 |
| Superior Waterproofing And Restoration Company, Inc. | Saint Louis | MO | $0 |
| Surface Prep & Maintenance | Reno | NV | Subcontractor |
| Surface Specialists Of Nevada, Inc. | Las Vegas | NV | $0 |
| Swat Group, Inc. | New Berlin | WI | $0 |
| Swick & Son Maintenance Specialists, Inc. | Curtis Bay | MD | Subcontractor |
| S & W Waterproofing, Inc. | Lenexa | KS | Subcontractor |
| Sysco USA I, Inc. | Denver | CO | $0 |
| Tach Services, Inc. | Copperas Cove | TX | Subcontractor |
| Tahoe Fence Co. Inc. | Mound House | NV | $0 |
| Taps Contracting LLC | Pahrump | NV | $0 |
| Tasco Water Works, Inc. | Capitol Heights | MD | $0 |
| Taurus Industrial Group, LLC | La Porte | TX | Subcontractor |
