| PTParis Texas Plant | Paris | TX | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PGPerfect Glass and Machinery | Brooklyn | NY | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PVPeter Vizzusi | Aptos | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PLPhilips Lighting Company | Danville | KY | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PGPhoenix Glass Center LLC | Phoenix | AZ | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PSPigma Scientific | La Mirada | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| PCPrecision Colored Glass LLP | Portland | OR | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| QGQuality Glass Blowing | Sun Valley | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RFRainbow Fiberglass | Chino | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RAR. and H. Filter Co., INC. | Georgetown | DE | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RORgv Optical Images, LLC | Harlingen | TX | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RRRichann Rodeheaver, LLC | Oakland | MD | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RERiver End Glass Studio, INC. | Palm Coast | FL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RMRocky Mountain Scientific Glass Blowing | Denver | CO | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| RHRon Hinkle Glass LLC | Buckhannon | WV | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
 Simon Pearce (u.s.) INC. | Quechee | VT | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| SLSpeculas, L.l.c. | Brownsville | TX | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TCTafco Corporation | Melrose Park | IL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TBTamara Baskin Art Glass | Nashua | NH | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TITecglass & Instruments, LLC | Marion | NY | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TEThompson Enamel INC | Bellevue | KY | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TTTranscend Technology INC | Fremont | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| TGTwin Glass Industries INC | Gilroy | CA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| UWUnion Wadding CO | Chicago | IL | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| USUnited Silica Products INC | Hardyston Twp | NJ | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| UGUroboros Glass Studios | Portland | OR | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| UIUsglass INC. | Parkersburg | WV | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WEWa317936922 - Ennco Display Systems INC | Redmond | WA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WQWa317948097 - Quartzcastle LLC | Shelton | WA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WMWa317950067 - Mothership Glass LLC | Bellingham | WA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WCWa317950357 - Covenant Art Glass INC | Everett | WA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WIWheaton Industries | Millville | NJ | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WGWorcester Glassworks, LLC | Kula | HI | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
| WDWortman-ziel Designs | Port Hadlock | WA | Nonmetallic Mineral Product Manufacturing327212 | — | ◇ UNVERIFIED |
