| MWMilgard Windows and Doors | Simi Valley | CA | — | ◇ UNVERIFIED |
 Minneapolis Glass | Brooklyn Park | MN | — | ◇ UNVERIFIED |
| Minneapolis Glass CO | Minneapolis | MN | — | ◇ UNVERIFIED |
| MIModerustic INC | Rancho Cucamonga | CA | — | ◇ UNVERIFIED |
| MRMoon Roof Corporation of America | Roseville | MI | — | ◇ UNVERIFIED |
| MSMo Sci LLC | Rolla | MO | — | ◇ UNVERIFIED |
| MFMRBBB Futures Glass LLC | Allentown | PA | — | ◇ UNVERIFIED |
| MGMR Glass Tempering LLC | Brooklyn | NY | — | ◇ UNVERIFIED |
| MWMunn Works, LLC | Mount Vernon | NY | — | ◇ UNVERIFIED |
| MMMurakami Manufacturing U.s.a., INC. | Finley | KY | — | ◇ UNVERIFIED |
| MSMy Shower Door | Fort Myers | FL | — | ◇ UNVERIFIED |
| NTNashville Tempered Glass Corporation | Hendersonville | TN | — | ◇ UNVERIFIED |
| NANdk America INC | Belvidere | IL | — | ◇ UNVERIFIED |
| NINewport Industrial Glass INC | Stanton | CA | — | ◇ UNVERIFIED |
| NWNew Way General Consruction, INC. | Schenectady | NY | — | ◇ UNVERIFIED |
| NFNikkin Flux Corporation | Edwardsville | IL | — | ◇ UNVERIFIED |
| NWNikolas Weinstein Studios, Inc | Long Island City | NY | — | ◇ UNVERIFIED |
| NWNikolas Weinstein Studios INC. | San Francisco | CA | — | ◇ UNVERIFIED |
| NINorthwestern Industries | Seattle | WA | — | ◇ UNVERIFIED |
| NGNorthwest Glass & Mirror, INC. | Katy | TX | — | ◇ UNVERIFIED |
| NPNsg - Pilkington | Shelbyville | IN | — | ◇ UNVERIFIED |
| NTNy Tempering LLC | Plainview | NY | — | ◇ UNVERIFIED |
| NGNzilani Glass Conservation INC | Oakland | CA | — | ◇ UNVERIFIED |
| OSO'brien Stained Glass CO INC | Rollingstone | MN | — | ◇ UNVERIFIED |
| OSOceana Stained Glass | San Mateo | CA | — | ◇ UNVERIFIED |
| OGOcean Glass & Mirror Co., INC. | Lowell | MA | — | ◇ UNVERIFIED |
| OSOceanic Systems INC | Dallas | TX | — | ◇ UNVERIFIED |
| OGOhio Glass and Aluminum Company | Marysville | OH | — | ◇ UNVERIFIED |
| OMOhio Mirror Technologies, INC. | Paulding | OH | — | ◇ UNVERIFIED |
| OGOlathe Glass Company, Inc. | Olathe | KS | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope | Tampa | FL | — | ◇ UNVERIFIED |
| OBOldcastle Building Envelope INC | Albertville | MN | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope, INC North | North Miami Beach | FL | — | ◇ UNVERIFIED |
| OBOldcastle Buildingenvelope INC South | Miami | FL | — | ◇ UNVERIFIED |
| OGOldcastle Glass INC Dba Downey Glass | Los Angeles | CA | — | ◇ UNVERIFIED |
| OTOld Town Fiberglass Dba Fiberglass Fabri | Orange | CA | — | ◇ UNVERIFIED |
| OGOregon Glass Company | Wilsonville | OR | — | ◇ UNVERIFIED |
| OTOver the Mountain Glass, INC. | Pelham | AL | — | ◇ UNVERIFIED |
| OTOver the Mountain Glass, INC. | Bessemer | AL | — | ◇ UNVERIFIED |
| OBOwens Brockway Glass | Rossville | GA | — | ◇ UNVERIFIED |
| OIOwens-illinois, INC. | Waco | TX | — | ◇ UNVERIFIED |
| PNPacific Northwest Glass & Mirror, LLC | Vancouver | WA | — | ◇ UNVERIFIED |
| PCParadise Commercial Glazing Inc. | Pantego | TX | — | ◇ UNVERIFIED |
| PTParagon Tempered Glass, LLC | Antwerp | OH | — | ◇ UNVERIFIED |
| PCPatn Capital LLC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| PCPATN Captial LLC | Pittsburgh | PA | — | ◇ UNVERIFIED |
| PTP&c Tempered Glass, LLC | Medley | FL | — | ◇ UNVERIFIED |
| PRPearl River Glass Studio INC. | Jackson | MS | — | ◇ UNVERIFIED |
| PTPebble Technology International | Manteca | CA | — | ◇ UNVERIFIED |
| PIPennsylvania Insulating Glass CORP. | Lewistown | PA | — | ◇ UNVERIFIED |
