| LMLoftness Manufacturing | Hector | MN | — | ◇ UNVERIFIED |
| LILong Industries Buffalo Facility | Buffalo | TX | — | ◇ UNVERIFIED |
| LILong Industries Carlsbad Facility | Carlsbad | TX | — | ◇ UNVERIFIED |
| LTLouisville Tin & Stove | Louisville | KY | — | ◇ UNVERIFIED |
| LRLtc Roll & Engineering | Fraser | MI | — | ◇ UNVERIFIED |
| LILuffland Industries | Bates City | MO | — | ◇ UNVERIFIED |
| MDMac Donald Miller Facility Solutions | Seattle | WA | — | ◇ UNVERIFIED |
| MEMac Equipment INC | Sabetha | KS | — | ◇ UNVERIFIED |
| MLMachine Laboratory LLC | Chesterfield | MO | — | ◇ UNVERIFIED |
| MPMajestic Products Company | Huntington | IN | — | ◇ UNVERIFIED |
| MUMalach USA | Valley City | ND | — | ◇ UNVERIFIED |
| MMMann Made Products | Waterville | KS | — | ◇ UNVERIFIED |
 M-b Companies INC | Chilton | WI | — | ◇ UNVERIFIED |
| MAMcgill Air Flow LLC | Bennington | VT | — | ◇ UNVERIFIED |
| MDMcgill Development Corporation | Westerville | OH | — | ◇ UNVERIFIED |
| MMMckinstry Metal Works INC. | Chicopee | MA | — | ◇ UNVERIFIED |
| MEMclellan Equipment INC | Hanford | CA | — | ◇ UNVERIFIED |
| MAMercury Aircraft Bath Plant | Bath | NY | — | ◇ UNVERIFIED |
| MAMercury Aircraft INC | Hammondsport | NY | — | ◇ UNVERIFIED |
| MCMetal Components INC | Wyoming | MI | — | ◇ UNVERIFIED |
| MCMetal Craft Engineering | Fenwick | WV | — | ◇ UNVERIFIED |
| MCMetal Crafters | Ronkonkoma | NY | — | ◇ UNVERIFIED |
| MMetalcrafters | Simi Valley | CA | — | ◇ UNVERIFIED |
| MMMetal Masters of North Florida INC | Jacksonville | FL | — | ◇ UNVERIFIED |
| MIMetaltech Industries INC | Longmont | CO | — | ◇ UNVERIFIED |
| MFMeyerink Farm Service INC. | Platte | SD | — | ◇ UNVERIFIED |
| MAMfs Arz | Phoenix | AZ | — | ◇ UNVERIFIED |
| MGM & G Duravent INC | Vacaville | CA | — | ◇ UNVERIFIED |
| MHM H Eby INC | Story City | IA | — | ◇ UNVERIFIED |
| MFMidwest Fabrication, LLC | Grafton | ND | — | ◇ UNVERIFIED |
| MIMidwest Industrial Metals | Northlake | IL | — | ◇ UNVERIFIED |
| MFMikes Fabricating Incorporated | Moody | AL | — | ◇ UNVERIFIED |
| MBMilo Bulk Plant LLC | Penn Yan | NY | — | ◇ UNVERIFIED |
| MMMissouri Machine & Plow, LLC. | Cedartown | GA | — | ◇ UNVERIFIED |
| MMM & M Tank & Tower | Greeley | CO | — | ◇ UNVERIFIED |
| MWModern Welding | Newark | OH | — | ◇ UNVERIFIED |
| MIMonti Incorporated | Cincinnati | OH | — | ◇ UNVERIFIED |
| MDMoore Dp, LLC | Lexington | KY | — | ◇ UNVERIFIED |
| MMMoreng Metal Products | Totowa | NJ | — | ◇ UNVERIFIED |
| MSMountain States Sheet Metal | Pueblo | CO | — | ◇ UNVERIFIED |
| MAMoyer Auto Body/dublin | Dublin | PA | — | ◇ UNVERIFIED |
| MIMsm Industries Incorporated | North Reading | MA | — | ◇ UNVERIFIED |
| NENettie's Equipment | Duck | WV | — | ◇ UNVERIFIED |
| NMNewhouse Mfg | Redmond | OR | — | ◇ UNVERIFIED |
| NNewlons | Elkins | WV | — | ◇ UNVERIFIED |
| NSNiles Steel Tank | Niles | MI | — | ◇ UNVERIFIED |
| NNNoll Norwesco LLC | Fife | WA | — | ◇ UNVERIFIED |
| NMNor-cal Metal Fabricators | Oakland | CA | — | ◇ UNVERIFIED |
| NANorth American Kitchen Solutions, INC. | Dallas | GA | — | ◇ UNVERIFIED |
| NMNorthwoods Manufacturing INC | Kingsford | MI | — | ◇ UNVERIFIED |
| NSNorwood Sales INC. | Horace | ND | — | ◇ UNVERIFIED |
| NINu-way Industries INC | Des Plaines | IL | — | ◇ UNVERIFIED |
| OMOmni Metals CO INC | Somersworth | NH | — | ◇ UNVERIFIED |
| OMOrchard Machinery Corporation | Yuba City | CA | — | ◇ UNVERIFIED |
| OIOrion Industries Auburn | Auburn | WA | — | ◇ UNVERIFIED |
| OWO W Hubbell & Sons | New York Mills | NY | — | ◇ UNVERIFIED |
| OIOxbo International CORP | Lynden | WA | — | ◇ UNVERIFIED |
| PAPacific Award Metals INC | Baldwin Park | CA | — | ◇ UNVERIFIED |
| PMPalmer Mfg. & Tank, INC. | Dickinson | ND | — | ◇ UNVERIFIED |
| PPPaper People, LLC | Vancouver | WA | — | ◇ UNVERIFIED |
| PMParagon Metal Fabrication | Cincinnati | OH | — | ◇ UNVERIFIED |
| PMParamount Manufacturing CO 445 | Long Beach | CA | — | ◇ UNVERIFIED |
| PHParker Hannifin CORP | Deerwood | MN | — | ◇ UNVERIFIED |
| PSPascagoula Sheet Metal Works INC | Pascagoula | MS | — | ◇ UNVERIFIED |
| PSPathfinder Systems INC | Kansas City | MO | — | ◇ UNVERIFIED |
| PMPeck Manufacturing CO | Herman | NE | — | ◇ UNVERIFIED |
| PPPeko Precision Products Sheet Metal Division | Rochester | NY | — | ◇ UNVERIFIED |
| PMPenasack Machine CO | Albion | NY | — | ◇ UNVERIFIED |
| PDPennsylvania Drilling Company | Woodstock | VA | — | ◇ UNVERIFIED |
| PTPermian Tank and Manufacturing INC / El Reno Manufacturing Plant | El Reno | OK | — | ◇ UNVERIFIED |
| PIPetersen Industries, INC. | Lake Wales | FL | — | ◇ UNVERIFIED |
| PMP&h Manufacturing | Shelbyville | IL | — | ◇ UNVERIFIED |
| PMPitonyak Machinery CORP | Carlisle | AR | — | ◇ UNVERIFIED |
| POPitts Oilfield | San Angelo | TX | — | ◇ UNVERIFIED |
| PMPneumafil Metals Corporation | Charlotte | NC | — | ◇ UNVERIFIED |
| PRPowder River INC | Provo | UT | — | ◇ UNVERIFIED |
| PMPremier Manufacturing INC | Liberty Lake | WA | — | ◇ UNVERIFIED |
| PPPremier Pump and Power | Vancouver | WA | — | ◇ UNVERIFIED |
| PMPrescott Metal | Biddeford | ME | — | ◇ UNVERIFIED |
| PSPressed Steel Tank CO INC | Milwaukee | WI | — | ◇ UNVERIFIED |
| PIPrice Industries INC | Suwanee | GA | — | ◇ UNVERIFIED |
| PQProject Quiver Automotive Aluminum Complex | Bowling Green | KY | — | ◇ UNVERIFIED |
| PMProto Mfg | Spokane | WA | — | ◇ UNVERIFIED |
| PIPro-type INC | Sterling | VA | — | ◇ UNVERIFIED |
| PSProvidence Saint Vincent Medical Center | Portland | OR | — | ◇ UNVERIFIED |
| PMPsf Mechanical INC | Seattle | WA | — | ◇ UNVERIFIED |
| PMPungo Machine Shop, INC. | Pantego | NC | — | ◇ UNVERIFIED |
| PPyramid | Lordsburg | NM | — | ◇ UNVERIFIED |
| QFQual Fab INC | Seattle | WA | — | ◇ UNVERIFIED |
 Quality Metal Products INC. | Lakewood | CO | — | ◇ UNVERIFIED |
| QPQuality Plus Manufacturing INC | Oelwein | IA | — | ◇ UNVERIFIED |
| RSRadiant Steel Prod Co/williamsport Plt | Williamsport | PA | — | ◇ UNVERIFIED |
| RCRails Company | Maplewood | NJ | — | ◇ UNVERIFIED |
| RFRanco Fertiservice INC | Sioux Rapids | IA | — | ◇ UNVERIFIED |
| RMRay Machine Company INC | Baltimore | MD | — | ◇ UNVERIFIED |
| RLRedguard LLC | Halstead | KS | — | ◇ UNVERIFIED |
| RNReed National CORP | Westfield | MA | — | ◇ UNVERIFIED |
| RGR G Applegate Steel Company Incorporated | Saratoga | IN | — | ◇ UNVERIFIED |
| RCRimpull Corporation (stormwater) | Olathe | KS | — | ◇ UNVERIFIED |
| RTRiverside Tank & Manufacturing CORP | Saint Clair | MI | — | ◇ UNVERIFIED |
