| OCOn Call Heating & Air, LLC | Trussville | AL | — | ◇ UNVERIFIED |
| ODOreco Duct Systems, INC. | Covina | CA | — | ◇ UNVERIFIED |
| OIOrthalign, INC. | Aliso Viejo | CA | — | ◇ UNVERIFIED |
| OHOutfitters Hvac, INC. | Centerville | UT | — | ◇ UNVERIFIED |
| OPOverland Park Mechanical | Stilwell | KS | — | ◇ UNVERIFIED |
| PMPace Metal Works | Cerritos | CA | — | ◇ UNVERIFIED |
| PEPacheco Enterprises LLC | Cumming | GA | — | ◇ UNVERIFIED |
| PAPacific Award Metals | Pomona | CA | — | ◇ UNVERIFIED |
| PIPac-refco INC | Hesperia | CA | — | ◇ UNVERIFIED |
| PMPalisade Manufacturing Company | Palisade | MN | — | ◇ UNVERIFIED |
| PMPalisade Metalcraft INC | Costa Mesa | CA | — | ◇ UNVERIFIED |
| PEPar Engineering INC Dba Commercial Cooling | City of Industry | CA | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Lyons | NY | — | ◇ UNVERIFIED |
| PCParker-hannifin Corporation | Sharon | TN | — | ◇ UNVERIFIED |
| PSPassage Supply CO. | El Paso | TX | — | ◇ UNVERIFIED |
| PAP a Yannacio & Associates INC | Highland Hts | OH | — | ◇ UNVERIFIED |
| PIPci Industries LLC Dba Pottorff | Montebello | CA | — | ◇ UNVERIFIED |
| PVPecos Ventures Industries INC | Corona | CA | — | ◇ UNVERIFIED |
| PGPenguin Group USA | Kirkwood | NY | — | ◇ UNVERIFIED |
| PRPenn Refrigeration Service | Wilkes Barre | PA | — | ◇ UNVERIFIED |
| PLPeravan, LLC | North Las Vegas | NV | — | ◇ UNVERIFIED |
| PAPerformance Air Conditioning & Heating, INC | Glendale | AZ | — | ◇ UNVERIFIED |
 Performance Plastics INC | San Ysidro | CA | — | ◇ UNVERIFIED |
| PBPeter Brett | Santa Paula | CA | — | ◇ UNVERIFIED |
| PIPfannenberg INC | Lancaster | NY | — | ◇ UNVERIFIED |
| PCPinellas Cool Breeze Air LLC | Pinellas Park | FL | — | ◇ UNVERIFIED |
| PFPipe Fabricators International | El Cajon | CA | — | ◇ UNVERIFIED |
| PAPittsburgh Annealing Box CO | Mc Kees Rocks | PA | — | ◇ UNVERIFIED |
| PHPolar Heating & Cooling | El Paso | TX | — | ◇ UNVERIFIED |
| PSPolar Service Company INC | Salinas | CA | — | ◇ UNVERIFIED |
| PPortacool | Center | TX | — | ◇ UNVERIFIED |
| PPPps Packaging Company | Fowler | CA | — | ◇ UNVERIFIED |
| PIPraxair INC | Fairfield | AL | — | ◇ UNVERIFIED |
| PSPraxiar Surface Technologies | Los Angeles | CA | — | ◇ UNVERIFIED |
 Precision Control Systems INC | Eden Prairie | MN | — | ◇ UNVERIFIED |
| PEPrecision Elite Gymnastics | Clackamas | OR | — | ◇ UNVERIFIED |
| PRPrime Refrigeration Systems | Riverside | CA | — | ◇ UNVERIFIED |
| PAPristine Air Conditioning Corp. | Kapolei | HI | — | ◇ UNVERIFIED |
| PCProcess Cooling International | Saint Helena | CA | — | ◇ UNVERIFIED |
| PBProtech Building Services INC | West Valley | UT | — | ◇ UNVERIFIED |
| PHPure Humidifier Company | Chaska | MN | — | ◇ UNVERIFIED |
| RIR4f INC | Gardena | CA | — | ◇ UNVERIFIED |
| RRRainey Road LLC | Andover | KS | — | ◇ UNVERIFIED |
| RGRamon Garcia | Weatherford | TX | — | ◇ UNVERIFIED |
| RTRandall's Temperture Control Specialist INC. | Yukon | OK | — | ◇ UNVERIFIED |
| RWRandell Warehouse | Tucson | AZ | — | ◇ UNVERIFIED |
| RIR-cold, INC. | Perris | CA | — | ◇ UNVERIFIED |
| RLRectorseal, LLC | Fall River | MA | — | ◇ UNVERIFIED |
| RSReefer Systems INC Dba Mct Companies | Fresno | CA | — | ◇ UNVERIFIED |
| RIR.e.f. Industries INC. | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| RDRefrigeration Design & Service, INC. | Mamaroneck | NY | — | ◇ UNVERIFIED |
| RDRefrigeration Design Technologies | Waxahachie | TX | — | ◇ UNVERIFIED |
| RRRefrigeration Research INC | Newport | TN | — | ◇ UNVERIFIED |
| RPRennwerks Performance INC Dba Sprint Motorsports | Tracy | CA | — | ◇ UNVERIFIED |
| RMRicardo Maldonado | Allen | TX | — | ◇ UNVERIFIED |
| RMRichardson Mechanical | Richardson | TX | — | ◇ UNVERIFIED |
| RDRickelle Dickerson | Garden Grove | CA | — | ◇ UNVERIFIED |
| RERitchie Engineering Company INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| RRRitemp Refrigeration, INC. | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| RWRj Welding | Fontana | CA | — | ◇ UNVERIFIED |
| RMRms Manufacturing | Manteca | CA | — | ◇ UNVERIFIED |
| RSRms Supply INC Dba Rms Manufacturing | Manteca | CA | — | ◇ UNVERIFIED |
| RBRobert Brown | Houston | TX | — | ◇ UNVERIFIED |
| RMRocky Mountain Mechanical Systems, INC. | Colorado Springs | CO | — | ◇ UNVERIFIED |
| RMRoofscreen Manufacturing | San Andreas | CA | — | ◇ UNVERIFIED |
| RMRoyal Metal Works, INC. | Las Vegas | NV | — | ◇ UNVERIFIED |
| RCRoyce Company | Wilmington | NC | — | ◇ UNVERIFIED |
 Roy E Hanson Jr Mfg CO | Los Angeles | CA | — | ◇ UNVERIFIED |
| RRR & R Engineering | Broken Arrow | OK | — | ◇ UNVERIFIED |
| RRsg-norlake | Hudson | WI | — | ◇ UNVERIFIED |
| RSR. Soule and Son, inc | Enosburg Falls | VT | — | ◇ UNVERIFIED |
| RCRudy's Commercial Refrigeration, Inc. | San Pablo | CA | — | ◇ UNVERIFIED |
| RCRuskin CO | Jurupa Valley | CA | — | ◇ UNVERIFIED |
| RPRv Products | Wichita | KS | — | ◇ UNVERIFIED |
| RMRyco Metal Products | Benicia | CA | — | ◇ UNVERIFIED |
| SFSamani Food Technologies Incorporated | Antioch | CA | — | ◇ UNVERIFIED |
| SISanden International USA Wylie | Wylie | TX | — | ◇ UNVERIFIED |
| SISatco INC | El Segundo | CA | — | ◇ UNVERIFIED |
| SESci Enclosures | San Jose | CA | — | ◇ UNVERIFIED |
| SSSeaver Soon Md INC – Dba: the Skin Clinic Md | San Diego | 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 |
| 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 |
| SISonora Industries | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| SCSouth County Air Services INC. | Irvine | CA | — | ◇ UNVERIFIED |
| SCSouthern Comfort Heating & Air Conditioning, INC. | Dahlonega | GA | — | ◇ UNVERIFIED |
| SRSouthtown Refrigeration | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| SSSpecific Systems, LLC | Tulsa | OK | — | ◇ UNVERIFIED |
| SSSpencer Street Self Storage, LLC | Torrance | CA | — | ◇ UNVERIFIED |
| SSSpig S.p.a. | Corpus Christi | TX | — | ◇ UNVERIFIED |
