| BEBrothers Energy Incorporated | San Francisco | CA | — | ◇ UNVERIFIED |
| BABus Air Manufacturing/woods Metal Fabrication | Rhome | TX | — | ◇ UNVERIFIED |
| BSBva Systems, INC | Sparks | NV | — | ◇ UNVERIFIED |
| CMCabrac Mfg | San Fernando | CA | — | ◇ UNVERIFIED |
| CDCa Dept. of Transportation | Laguna Niguel | CA | — | ◇ UNVERIFIED |
| CCCal Coast Refrigeration INC. | Santa Barbara | CA | — | ◇ UNVERIFIED |
| CSCalcor Space Fac INC | Whittier | CA | — | ◇ UNVERIFIED |
| CACalifornia Air Conveying Corporation | Baldwin Park | CA | — | ◇ UNVERIFIED |
| CICalifornia Industrial Refrigeration Machines INC. | Eastvale | CA | — | ◇ UNVERIFIED |
| CUCalifornia United Mechanical Dba United Mechanical INC | San Jose | CA | — | ◇ UNVERIFIED |
| C4Calion 4th Street Warehouse | Berkeley | CA | — | ◇ UNVERIFIED |
| CCCalsonic Climate Control Incorporated | Irvine | CA | — | ◇ UNVERIFIED |
| CCaltrans | Azusa | CA | — | ◇ UNVERIFIED |
| CMCanam Metal Prod | San Bernardino | CA | — | ◇ UNVERIFIED |
| CVCapital View General Construction, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| CCCarrier Corporation | Pelham | AL | — | ◇ UNVERIFIED |
| CCCarrier Corporation | Syracuse | NY | — | ◇ UNVERIFIED |
| CCCarrier Corporation | Indianapolis | IN | — | ◇ UNVERIFIED |
| CCCarrier CORP Tyler | Tyler | TX | — | ◇ UNVERIFIED |
Carrier Process Equipment Group INC | Mathiston | MS | — | ◇ UNVERIFIED |
| CTCarrier Transicold | Riverside | CA | — | ◇ UNVERIFIED |
| CCCatalina Composites | Garden Grove | CA | — | ◇ UNVERIFIED |
| CVCephea Valve Technologies | Santa Cruz | CA | — | ◇ UNVERIFIED |
| CCCeramic Cooling Tower CORP | Fort Worth | TX | — | ◇ UNVERIFIED |
| CMCertified Mechanical Insulation, LLC | Little Rock | AR | — | ◇ UNVERIFIED |
| CGC G I Sys | Paramount | CA | — | ◇ UNVERIFIED |
| CPCharmaster Products INC | Grand Rapids | MN | — | ◇ UNVERIFIED |
| CLChasan LLC | Bristol | VA | — | ◇ UNVERIFIED |
| CECheek Engineering & Stamping | Tustin | CA | — | ◇ UNVERIFIED |
| CECimarron Engineering, INC. | Wheat Ridge | CO | — | ◇ UNVERIFIED |
| CRCimco Refrigeration, INC. | Centennial | CO | — | ◇ UNVERIFIED |
| CLCinfab LLC | Lexington | KY | — | ◇ UNVERIFIED |
| CTCitizens Thermal - Iu Health (@ Riley Hosp) Chilled Water Plant | Indianapolis | IN | — | ◇ UNVERIFIED |
| COCity of Capitola | Capitola | CA | — | ◇ UNVERIFIED |
| CHClean Harbors | San Diego | CA | — | ◇ UNVERIFIED |
| CIClearflow, INC | Anaheim | CA | — | ◇ UNVERIFIED |
| CBClimate By Design Internatioanal | Owatonna | MN | — | ◇ UNVERIFIED |
| CBClimate By Design International INC | Owatonna | MN | — | ◇ UNVERIFIED |
| CMClimate Master of New Bern, LLC | New Bern | NC | — | ◇ UNVERIFIED |
| CRC&l Refrigeration | Corona | CA | — | ◇ UNVERIFIED |
| CICmc INC | Cabo Rojo | PR | — | ◇ UNVERIFIED |
| CACoastal Air LLC | Harrington | DE | — | ◇ UNVERIFIED |
| CRCoast Radiator Company | Los Angeles | CA | — | ◇ UNVERIFIED |
| CHCobalt Hvac Supply LLC | De Soto | KS | — | ◇ UNVERIFIED |
| CYCobalt Yachts | Vonore | TN | — | ◇ UNVERIFIED |
| CDCoil Design Corporation | Dayton | TN | — | ◇ UNVERIFIED |
| CMCoil Master Corporation | Moscow | TN | — | ◇ UNVERIFIED |
| CCCoilmaster Corporation | Phoenix | AZ | — | ◇ UNVERIFIED |
| CPCold Point Corporation | Rome | NY | — | ◇ UNVERIFIED |
| CCColmac Coil Mfg INC | Colville | WA | — | ◇ UNVERIFIED |