| SMScheu Mfg CO | Upland | CA | — | ◇ UNVERIFIED |
| SFSchwabel Fabricating Com INC | Tonawanda | NY | — | ◇ UNVERIFIED |
| SESci Enclosures | San Jose | CA | — | ◇ UNVERIFIED |
| SSSeaver Soon Md INC – Dba: the Skin Clinic Md | San Diego | CA | — | ◇ UNVERIFIED |
| SSSecond Sight Medical Products INC | Sylmar | CA | — | ◇ UNVERIFIED |
| SCSerra Corporation Silicon Val | San Jose | CA | — | ◇ UNVERIFIED |
| STServ Tech INC | Eugene | OR | — | ◇ UNVERIFIED |
| SGSeveneight Group, LLC | Miami | FL | — | ◇ UNVERIFIED |
| SGShannon Group, Kolpack Div | Bethel Springs | TN | — | ◇ UNVERIFIED |
| STSharing Three, INC. | Hialeah | FL | — | ◇ UNVERIFIED |
| SRSharpe Refrigeration, INC. | San Diego | CA | — | ◇ UNVERIFIED |
| SIShc, INC. | Athens | TN | — | ◇ UNVERIFIED |
| SPSheco Plant 2 | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| SMSheet Metal Specialists | Riverside | CA | — | ◇ UNVERIFIED |
| SMSherer Manufacturing, INC. | Clearwater | FL | — | ◇ UNVERIFIED |
| STShoals Tubular Products, INC. | Florence | AL | — | ◇ UNVERIFIED |
| SMSigma Manufacturing INC. | Marietta | GA | — | ◇ UNVERIFIED |
| SDSignal Division Lukens Genera | La Mirada | CA | — | ◇ UNVERIFIED |
| SJS & J Sheet Metal Supply, INC. | Bronx | NY | — | ◇ UNVERIFIED |
| SMS & M Aire, LLC | El Paso | TX | — | ◇ UNVERIFIED |
| SESmithco Engineering INC | Tulsa | OK | — | ◇ UNVERIFIED |
 Snow Machines Inc-midland | Midland | MI | — | ◇ UNVERIFIED |
| SGSnyder General CORP | Hutchins | TX | — | ◇ UNVERIFIED |
| SISonora Industries | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| STSo-semi Technologies Dba Optopax | San Jose | CA | — | ◇ UNVERIFIED |
| SCSouth County Air Services INC. | Irvine | CA | — | ◇ UNVERIFIED |
| SWSoutheastern Wholesale CORP. | Sarasota | FL | — | ◇ UNVERIFIED |
| SCSouthern Comfort Heating & Air Conditioning, INC. | Dahlonega | GA | — | ◇ UNVERIFIED |
| SHSouthern Heat Exchanger | Tuscaloosa | AL | — | ◇ UNVERIFIED |
| SHSouthern Hydraulic Cylinder INC. | Athens | TN | — | ◇ UNVERIFIED |
| SSSouthern Store Fixtures INC | Bessemer | AL | — | ◇ UNVERIFIED |
| SRSouthtown Refrigeration | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| S2Spamex 2, LLC | Hartford | WI | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| SSSpencer Street Self Storage, LLC | Torrance | CA | — | ◇ UNVERIFIED |
| SSSpig S.p.a. | Corpus Christi | TX | — | ◇ UNVERIFIED |
| SESpinal Elements | Fremont | CA | — | ◇ UNVERIFIED |
| SISpinnaker Industries International, INC. | Louisville | KY | — | ◇ UNVERIFIED |
| SISpiveco INC | Anaheim | CA | — | ◇ UNVERIFIED |
| SCSpx Cooling Technologies, INC | Peculiar | MO | — | ◇ UNVERIFIED |
| SFSpx Flow US LLC | Rockford | IL | — | ◇ UNVERIFIED |
| SHSpx Heat Transfer INC. | Tulsa | OK | — | ◇ UNVERIFIED |
| SHSpx Heat Transfer INC / Steel Products Fabrication | Tulsa | OK | — | ◇ UNVERIFIED |
| SCSquare 'd' CO | Chino | CA | — | ◇ UNVERIFIED |
| SIStainless International | Rancho Cordova | CA | — | ◇ UNVERIFIED |
| SPStandard Purification | Dunnellon | FL | — | ◇ UNVERIFIED |
| SMStead Motors | Walnut Creek | CA | — | ◇ UNVERIFIED |
| SSteeler | Newark | CA | — | ◇ UNVERIFIED |
| STSteel Tek | Tulsa | OK | — | ◇ UNVERIFIED |
| SEStellar Energy Americas, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| SEStellar Energy Americas, INC. | Jacksonville | FL | — | ◇ UNVERIFIED |
| SGStellar Group, INC. | Mamaroneck | NY | — | ◇ UNVERIFIED |
| SBSterling Boiler & Mechanical, INC. | Parrish | FL | — | ◇ UNVERIFIED |
| SBSterling Boiler & Mechanical, INC. | Gallatin | TN | — | ◇ UNVERIFIED |
| SAStewart Air Systems General Partnership | Azusa | CA | — | ◇ UNVERIFIED |
| SStorflex | Corning | NY | — | ◇ UNVERIFIED |
| SFStrategic Finishing INC | Tualatin | OR | — | ◇ UNVERIFIED |
| SPStructo Pte LTD | Valencia | CA | — | ◇ UNVERIFIED |
| SCStructural Composites Ind | Pomona | CA | — | ◇ UNVERIFIED |
| SAStudio Air Conditioning INC. | Calabasas | CA | — | ◇ UNVERIFIED |
| SAStulz Air Technology Systems INC | Frederick | MD | — | ◇ UNVERIFIED |
| SISubzero Insulation & Refrigeration Technologies LLC | Brooklyn | NY | — | ◇ UNVERIFIED |
| SBSun Badge CO | San Dimas | CA | — | ◇ UNVERIFIED |
| SLSuperb LLC | Costa Mesa | CA | — | ◇ UNVERIFIED |
| STSupercooler Technologies, INC. | Orlando | FL | — | ◇ UNVERIFIED |
| SFSuperior Filtration Products LLC | North Salt Lake | UT | — | ◇ UNVERIFIED |
| SFSuperior Fireplace CO | Fullerton | CA | — | ◇ UNVERIFIED |
| SFSuperior Fireplace CO | Fullerton | CA | — | ◇ UNVERIFIED |
| SHSuperior Holding INC | Hutchinson | KS | — | ◇ UNVERIFIED |
| SHSuperior Hoods, INC. | Tucker | GA | — | ◇ UNVERIFIED |
| SPSuperior Precision Metal | Canoga Park | CA | — | ◇ UNVERIFIED |
| SRSuperior Roof Metals Ii | San Jose | CA | — | ◇ UNVERIFIED |
| SCSutrak Corporation - Commerce City | Commerce City | CO | — | ◇ UNVERIFIED |
 Swanson Industries, INC | Madisonville | KY | — | ◇ UNVERIFIED |
| SISwegon, INC. | Sparks | NV | — | ◇ UNVERIFIED |
| SHSwisher Hvac CORP. | Brownsville | TX | — | ◇ UNVERIFIED |
| SISystem Incorporated | Seattle | WA | — | ◇ UNVERIFIED |
| TSTamarack Solar Products | Willits | CA | — | ◇ UNVERIFIED |
| TCTank Construction & Engineering INC | Fresno | CA | — | ◇ UNVERIFIED |
| TCTechnotherm CORP. | Tulsa | OK | — | ◇ UNVERIFIED |
| TITecogen INC | Waltham | MA | — | ◇ UNVERIFIED |
| TPTecumseh Products CO | Somerset | KY | — | ◇ UNVERIFIED |
| TPTecumseh Products Company | Tecumseh | MI | — | ◇ UNVERIFIED |
| TTedco | Livermore | CA | — | ◇ UNVERIFIED |
| TCTei Construction Services, INC. | Royersford | PA | — | ◇ UNVERIFIED |
| TRTeknotherm Refrigeration | Seattle | WA | — | ◇ UNVERIFIED |
| TITemp-air INC | Burnsville | MN | — | ◇ UNVERIFIED |
| TCTemperature Controlled Systems, INC | Gloucester | MA | — | ◇ UNVERIFIED |
| TATemtrol a Nortek Air Solutions Brand | Okarche | OK | — | ◇ UNVERIFIED |
| TLTerex Light Contruction | Rock Hill | SC | — | ◇ UNVERIFIED |
| TATexas All Temp Control LLC | Houston | TX | — | ◇ UNVERIFIED |
| TCTexas Coil | Fort Worth | TX | — | ◇ UNVERIFIED |
| TCThe Corken Steel Products Company | Covington | KY | — | ◇ UNVERIFIED |
| TDThe Delfield Company | Covington | TN | — | ◇ UNVERIFIED |
| TEThe Eldon Corporation | Jefferson | LA | — | ◇ UNVERIFIED |
| THThe Heil CO Dba Heil Trailer International | Athens | TN | — | ◇ UNVERIFIED |
| TKThe King Company Incorporated | Bishopville | SC | — | ◇ UNVERIFIED |
| TTheranova | San Francisco | CA | — | ◇ UNVERIFIED |
 Thermal Engineering International (usa), INC. a Subsidary of Babcock Power | Sapulpa | OK | — | ◇ UNVERIFIED |
| TLThermamasters, LLC. | Wetumpka | AL | — | ◇ UNVERIFIED |
