| 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 |
| CCC & C Hydraulics, INC. | Milford | CT | — | ◇ 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 |
| CLChart Lifecycle | Franklin | IN | — | ◇ UNVERIFIED |
| CLChasan LLC | Bristol | VA | — | ◇ UNVERIFIED |
| CECheek Engineering & Stamping | Tustin | CA | — | ◇ UNVERIFIED |
| CCChemfab Clute Facility | Clute | TX | — | ◇ UNVERIFIED |
| CIChm INC | Longview | WA | — | ◇ UNVERIFIED |
| CIChm INC 410 Storage | Longview | WA | — | ◇ UNVERIFIED |
| CFCicanese Fabrication INC | Punta Gorda | FL | — | ◇ 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 |
| CBCleaver Brooks Sales & Service | Dallas | TX | — | ◇ 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 |
| CPCmg Process INC | Sharpsville | PA | — | ◇ 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 |
| CMCoffman Mfg CORP | Cary | IL | — | ◇ 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 |
| CMColorado Mechanical Systems INC | Longmont | CO | — | ◇ UNVERIFIED |
| CIColumbia Industries LLC | Hillsboro | OR | — | ◇ UNVERIFIED |
| CHColumbus Hydraulics | Columbus | NE | — | ◇ UNVERIFIED |
| CHColumbus Hydraulics CO LLC | Columbus | NE | — | ◇ UNVERIFIED |
| CECombs Equipment Group LLC | Middlesboro | KY | — | ◇ UNVERIFIED |
| CICommodore Industries | Jackson | TN | — | ◇ UNVERIFIED |
| CHCommonwealth Heating & Cooling | Virginia Beach | VA | — | ◇ UNVERIFIED |
| CMComponents Manufacturing CO | Trenton | SC | — | ◇ UNVERIFIED |
| CICompressor Industries LLC | Melvindale | MI | — | ◇ UNVERIFIED |
| CUCompressors Unlimited International LLC | Dallas | TX | — | ◇ UNVERIFIED |
| CICompu-aire INC | Whittier | CA | — | ◇ UNVERIFIED |
| CCompu-metal,inc | Ontario | CA | — | ◇ UNVERIFIED |
| COCondair Operations LLC | Richmond | VA | — | ◇ UNVERIFIED |
| CMConerstone Manufacturing INC | San Marcos | CA | — | ◇ UNVERIFIED |
 Confab Manufacturing Company LLC | Sun Valley | CA | — | ◇ UNVERIFIED |
| CBConserv Building Services of North Carolina, LLC | Morrisville | NC | — | ◇ UNVERIFIED |
| CCConsol Controls CORP Plt No 4 | El Segundo | CA | — | ◇ UNVERIFIED |
| CFConsolidated Fabricators CORP | Galt | CA | — | ◇ UNVERIFIED |
| CMContract Metal Products INC | Tracy | CA | — | ◇ UNVERIFIED |
| CBCook Brothers Heating & Cooling LLC | Wichita | KS | — | ◇ UNVERIFIED |
| CSCooling Systems Technologies | North Las Vegas | NV | — | ◇ UNVERIFIED |
| CTCooling Tower Depot, INC. | Bedford Park | IL | — | ◇ UNVERIFIED |
| CTCooling Towers Systems, INC | Macon | GA | — | ◇ UNVERIFIED |
| CACOOLLINE America Inc. | Alpharetta | GA | — | ◇ UNVERIFIED |
| CACOOLLINE America Inc. | Alpharetta | GA | — | ◇ UNVERIFIED |
| CCCopeland CORP | Shelby | NC | — | ◇ UNVERIFIED |
| CICornelius, INC. | Glendale Heights | IL | — | ◇ UNVERIFIED |
| CLCorral-130 LLC | Compton | CA | — | ◇ UNVERIFIED |
 Cospolich, INC. | Norco | LA | — | ◇ UNVERIFIED |
| CFCrown Fixtures INC Dba Crowntonka Walk Ins | Winnebago | MN | — | ◇ UNVERIFIED |
| CACrystal Air & Water, INC. | Gainesville | FL | — | ◇ UNVERIFIED |
| CCCrystal Comfort INC. | New York | NY | — | ◇ UNVERIFIED |
| CLCsafe, LLC | Moraine | OH | — | ◇ UNVERIFIED |
| CCCts Corporation Automotive Products. | Elkhart | IN | — | ◇ UNVERIFIED |
| CSCullum Services INC | Lexington | SC | — | ◇ UNVERIFIED |
| CSCuring System Components, INC. | Tuttle | OK | — | ◇ UNVERIFIED |
| CICust-o-fab, INC. | Beaumont | TX | — | ◇ UNVERIFIED |
| CSCust-o-fab Specialty Services, LLC | Mcpherson | KS | — | ◇ UNVERIFIED |
| CACustom Actuator Products INC | Plymouth | MN | — | ◇ UNVERIFIED |
| CACustom Actuator Products INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| CCCustom Cooler INC | Elkton | KY | — | ◇ UNVERIFIED |
| CCCustom Cylinders International INC | Winchester | KY | — | ◇ UNVERIFIED |
| DIDadco, INC. | Comstock Park | MI | — | ◇ UNVERIFIED |
| DADaikin Applied America, INC. (formally Mcquay International) | Scottsboro | AL | — | ◇ UNVERIFIED |
 Daikin Applied Americas INC | Faribault | MN | — | ◇ UNVERIFIED |
| Daikin Applied Americas INC | Faribault | MN | — | ◇ UNVERIFIED |
| DADaikin Applied - Owatonna East | Owatonna | MN | — | ◇ UNVERIFIED |
| DODaikin Office Upgrade | Verona | VA | — | ◇ UNVERIFIED |
| DCDalou CORP Dba Tomco Products | Azusa | CA | — | ◇ UNVERIFIED |
| DSDanfoss Scroll Technologies | Arkadelphia | AR | — | ◇ UNVERIFIED |
| DTDanfoss Turbocor Compressors - Building E | Tallahassee | FL | — | ◇ UNVERIFIED |
| DAData Aire INC | Orange | CA | — | ◇ UNVERIFIED |
| DCData Cooling Technologies (1667080058) | Streetsboro | OH | — | ◇ UNVERIFIED |
| DSDatalogic Scanning | Eugene | OR | — | ◇ UNVERIFIED |
| DIDayco Inc/pottstown Boro | Pottstown | PA | — | ◇ UNVERIFIED |
| DUDbk USA INC | Spartanburg | SC | — | ◇ UNVERIFIED |
| DPD&b Precision Sheetmetal | Oakdale | CA | — | ◇ UNVERIFIED |
| DEDCG Enterprises LLC | Tampa | FL | — | ◇ UNVERIFIED |
| DGDell Gardens Business Center | Campbell | CA | — | ◇ UNVERIFIED |
