| MUMetcan USA | Adrian | MI | — | ◇ UNVERIFIED |
| MRMetech Recycling | Gilroy | CA | — | ◇ UNVERIFIED |
| MSMetro Scrap Metals INC | North Little Rock | AR | — | ◇ UNVERIFIED |
| MBMicro-lite - Buffalo (handling Facility) | Buffalo | KS | — | ◇ UNVERIFIED |
| MLMicro-lite, L.l.c. | Buffalo | KS | — | ◇ UNVERIFIED |
| MUMicronized Ultra Tech INC | Richmond | CA | — | ◇ UNVERIFIED |
| MIMidwest Iron & Metal CO | Hutchinson | KS | — | ◇ UNVERIFIED |
| MPMidwest Perlite Company, Inc. | Appleton | WI | — | ◇ UNVERIFIED |
| MLM-i LLC - Amelia Grinding & Bulk Storage Facility | Amelia | LA | — | ◇ UNVERIFIED |
| MQMillville Quarry | Baltimore | MD | — | ◇ UNVERIFIED |
| MIMis INC | Surgoinsville | TN | — | ◇ UNVERIFIED |
| MSMi Swaco Greystone Barite Mine | Battle Mountain | NV | — | ◇ UNVERIFIED |
| MPMitsubishi Polycrstalline Silicon America CORP | Theodore | AL | — | ◇ UNVERIFIED |
| MZMitsui Zinc Powder | Monaca | PA | — | ◇ UNVERIFIED |
| MRMjd Resource INC. | Frisco | TX | — | ◇ UNVERIFIED |
 Mmc Materials INC | Memphis | TN | — | ◇ UNVERIFIED |
| MAModern Art Services | Long Island City | NY | — | ◇ UNVERIFIED |
| MSMonterey Sculpture Center | Sand City | CA | — | ◇ UNVERIFIED |
| MSMoreys Salvage & Glass | Windsor | CO | — | ◇ UNVERIFIED |
| MFMorrow Foundry | Coffeyville | KS | — | ◇ UNVERIFIED |
| MBMr. Butler | Fulshear | TX | — | ◇ UNVERIFIED |
| MCMri CORP Chandler Plt | Chandler | AZ | — | ◇ UNVERIFIED |
| MHMt Hope X274-113m | Bronx | NY | — | ◇ UNVERIFIED |
| MFMulti Flex Plating Co/collingdale | Collingdale | PA | — | ◇ UNVERIFIED |
| MMultiserv | Birmingham | AL | — | ◇ UNVERIFIED |
| M1Multiserv/plt 18 Steelton | Steelton | PA | — | ◇ UNVERIFIED |
| MKMurray Keystone Processing Inc/keystone Cleaning Plt | Indiana | PA | — | ◇ UNVERIFIED |
| NLNanocor LLC | Aberdeen | MS | — | ◇ UNVERIFIED |
| NANanshan America Advanced Aluminum Technologies | Lafayette | IN | — | ◇ UNVERIFIED |
| NCNational City Foundry | San Diego | CA | — | ◇ UNVERIFIED |
| NRNational Refining CORP | Orange | CA | — | ◇ UNVERIFIED |
| NSNatl Smelting & Refining CO | Commerce City | CO | — | ◇ UNVERIFIED |
| NUNemak USA INC. - Gateway | Sheboygan | WI | — | ◇ UNVERIFIED |
| NSNevada Slag, INC | Mcgill | NV | — | ◇ UNVERIFIED |
| NRNewell Recycling of San Antonio | San Antonio | TX | — | ◇ UNVERIFIED |
| NENew England Lead Burning Co, INC | San Leandro | CA | — | ◇ UNVERIFIED |
| NENew Enterprise Stone & Lime CO Inc/fairfield | Cumberland | PA | — | ◇ UNVERIFIED |
| NHNew Horizon Florida, INC Dba New Horizon Pm | Pinellas Park | FL | — | ◇ UNVERIFIED |
| NMNewton Mcdonald County Landfill | Neosho | MO | — | ◇ UNVERIFIED |
| NINl Industries | Pedricktown | NJ | — | ◇ UNVERIFIED |
| NMNoble Metal Services | Cranston | RI | — | ◇ UNVERIFIED |
| NFNon Ferrous Recycling | South Plainfield | NJ | — | ◇ UNVERIFIED |
| NRNoranda Recycling INC | San Jose | CA | — | ◇ UNVERIFIED |
| NPNorcal Perlite, Inc. | Bakersfield | CA | — | ◇ UNVERIFIED |
| NANorth American Recycling and Crushing LLC | Anaheim | CA | — | ◇ UNVERIFIED |
| NANorth American Recycling & Crushing, LLC. | Colton | CA | — | ◇ UNVERIFIED |
| NMNortheast Metal Processors, INC. | Plantersville | MS | — | ◇ UNVERIFIED |
| NSNortheast Solite Corporation | Mount Marion | NY | — | ◇ UNVERIFIED |
| NSNorth Star Water Treatment Facility | Grass Valley | CA | — | ◇ UNVERIFIED |
| NANorthwest Alloys INC | Addy | WA | — | ◇ UNVERIFIED |
| NNNorthwest Noble Metals | Spokane | WA | — | ◇ UNVERIFIED |
| NBNovelis Bay Minette Operating Site | Bay Minette | AL | — | ◇ UNVERIFIED |
| NMNull's Machine & Mfg., Inc., Huntington | Huntington | WV | — | ◇ UNVERIFIED |
| NDNyc Dept of Parks-columbia Smelting & Refining Works Site | Brooklyn | NY | — | ◇ UNVERIFIED |
| OIOcm Industries CORP. | Miami | FL | — | ◇ UNVERIFIED |
| OIOgs/cascade INC | Salem | OR | — | ◇ UNVERIFIED |
| OVOhio Valley Aluminum | Shelbyville | KY | — | ◇ UNVERIFIED |
| OVOhio Valley Aluminum C LLC Niles Facilit | Niles | OH | — | ◇ UNVERIFIED |
| OVOhio Valley Aluminum CO. LLC | Boonville | IN | — | ◇ UNVERIFIED |
| ONOil-dri North and South Plant | Ochlocknee | GA | — | ◇ UNVERIFIED |
| OTOil Technology INC | East Chicago | IN | — | ◇ UNVERIFIED |
| OIOk Iron and Metal / Metal Reclamation Faclty | Ardmore | OK | — | ◇ UNVERIFIED |
| OBOldani Brothers LLC | North Kingstown | RI | — | ◇ UNVERIFIED |
| OOOmni Oxide CORP Ohio Oxide Div | Lancaster | OH | — | ◇ UNVERIFIED |
| OOOmni Oxide Georgia Oxide | Lithonia | GA | — | ◇ UNVERIFIED |
| OMOmnisource - Montvale | Montvale | VA | — | ◇ UNVERIFIED |
| OSOmnisource Sturgis | Sturgis | MI | — | ◇ UNVERIFIED |
| OVOmya Verpol Plant | Florence | VT | — | ◇ UNVERIFIED |
| OMOpta Minerals Harseeville Plant | Hardeeville | SC | — | ◇ UNVERIFIED |
| OPOswego Public Works Department | Oswego | NY | — | ◇ UNVERIFIED |
| OJOunce Jewelry INC Dba Ounce Collection INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| OHOwls Head Alloys | West Point | MS | — | ◇ UNVERIFIED |
| OCOzinga Cement Incorporated Contractor of Cleveland-cliffs Bu | Burns Harbor | IN | — | ◇ UNVERIFIED |
| OSOzinga Slag LLC | East Chicago | IN | — | ◇ UNVERIFIED |
| PCPacific Custom Materials | Stockton | CA | — | ◇ UNVERIFIED |
| PPPacific Power Vac - Portland Facility | Portland | OR | — | ◇ UNVERIFIED |
| PVPalmetto Vermiculite | Woodruff | SC | — | ◇ UNVERIFIED |
| PMPaul Matsumoto | Rio Linda | CA | — | ◇ UNVERIFIED |
| PSPauls Station of Webster | Rochester | NY | — | ◇ UNVERIFIED |
| PTPebble Technology International | Pearl River | LA | — | ◇ UNVERIFIED |
| PAPeerless Alloy INC | Denver | CO | — | ◇ UNVERIFIED |
 Penco Products INC | Vicksburg | MS | — | ◇ UNVERIFIED |
| PRPenn Rock Aggregates | North Versailles | PA | — | ◇ UNVERIFIED |
| PSPennsy Supply Summit Sta/quarry Wayne Twp | Summit Station | PA | — | ◇ UNVERIFIED |
| PCPerformance Construction LLC | Kissimmee | FL | — | ◇ UNVERIFIED |
| PPPerlite Processing Plant | Fallon | NV | — | ◇ UNVERIFIED |
| PVPerlite Vermiculite Packaging Industries INC. | North Bloomfield | OH | — | ◇ UNVERIFIED |
| PMPhoenix Metals of Pennsylvania, INC. | Butler | PA | — | ◇ UNVERIFIED |
| PSPhoenix Services LLC | Roanoke | VA | — | ◇ UNVERIFIED |
| PWPimalco (a Wholly-owned Subsidiary of Alcoa) | Chandler | AZ | — | ◇ UNVERIFIED |
| PAPioneer Air Systems INC | Wartburg | TN | — | ◇ UNVERIFIED |
| PMPittsburgh Metal & Equipment CO | Jersey City | NJ | — | ◇ UNVERIFIED |
| PIPlacerville Industries | Placerville | CA | — | ◇ UNVERIFIED |
| PSP&l Scrap Metal Iron INC | Colorado Springs | CO | — | ◇ UNVERIFIED |
| PPmr | Englewood | CO | — | ◇ UNVERIFIED |
| PEPowerhouse Entertainment LLC | North Hollywood | CA | — | ◇ UNVERIFIED |
| PMPower Mount INC | Somerset | KY | — | ◇ UNVERIFIED |
| PJPrecious Jackson Metals LLC | Mamaroneck | NY | — | ◇ UNVERIFIED |
| PMPrecious Metal Buyers, LLC | Tampa | FL | — | ◇ UNVERIFIED |
| PMPrecious Metal Refiners, INC. | Englewood | CO | — | ◇ UNVERIFIED |
