| GBGold Bond - Wak Plant | Waukegan | IL | — | ◇ UNVERIFIED |
| GGG-p Gypsum CORP | Florence | CO | — | ◇ UNVERIFIED |
| GPGypsum Production Operations | Galena Park | TX | — | ◇ UNVERIFIED |
| HGHarrison Gypsum Company Dba Allied Custo | Birmingham, Al | AL | — | ◇ UNVERIFIED |
| HGHarrison Gypsum Dba Arcosa Specialty Materials - Mooreland Plant | Mooreland | OK | — | ◇ UNVERIFIED |
| HIHeadwaters INC. | Cumberland City | TN | — | ◇ UNVERIFIED |
| HHHm Holloway INC | Lost Hills | CA | — | ◇ UNVERIFIED |
| IGInnovative Gypsum Products LLC | Princeton | MN | — | ◇ UNVERIFIED |
| IOInspired Ornamental LLC | Salem | NH | — | ◇ UNVERIFIED |
| JLJax Lng | Jacksonville | FL | — | ◇ UNVERIFIED |
| JIJimco Integrated Services, Inc. | Savannah | GA | — | ◇ UNVERIFIED |
| LNLafarge North America | Cleveland | OH | — | ◇ UNVERIFIED |
| LNLafarge North America Gypsum Div | Newark | NJ | — | ◇ UNVERIFIED |
| LILeading Industry / Pinnpack | Oxnard | CA | — | ◇ UNVERIFIED |
| LLLuxeramics LLC | Paterson | NJ | — | ◇ UNVERIFIED |
| MAMazzolini Artcraft Company Incorporated | Cleveland | OH | — | ◇ UNVERIFIED |
| MWMcqueeney Wallboard | Mc Queeney | TX | — | ◇ UNVERIFIED |
| MGMich Gypsum CO | Whittemore | MI | — | ◇ UNVERIFIED |
| MAModular Arts | Kent | WA | — | ◇ UNVERIFIED |
| MMotoart | El Segundo | CA | — | ◇ UNVERIFIED |
| NGNational Gypsum | Cleburne | TX | — | ◇ UNVERIFIED |
| NGNational Gypsum Company | Portsmouth | NH | — | ◇ UNVERIFIED |
| NGNational Gypsum Company - Fort Dodge | Fort Dodge | IA | — | ◇ UNVERIFIED |
| NFNatl Fuel Gas Supply Corp/henderson Sta | Stoneboro | PA | — | ◇ UNVERIFIED |
| NNNew Ngc INC | Lorain | OH | — | ◇ UNVERIFIED |
| NNNew Ngc, INC. | Mount Holly | NC | — | ◇ UNVERIFIED |
| NNNew Ngc, INC. | Tampa | FL | — | ◇ UNVERIFIED |
| NNNew Ngc INC D/b/a National Gypsum CO | East Greenbush | NY | — | ◇ UNVERIFIED |
| NNNew Ngc, INC. Dba National Gypsum Services Corporation | Waukegan | IL | — | ◇ UNVERIFIED |
| NLNiza LLC | San Carlos | CA | — | ◇ UNVERIFIED |
| OPOmega Products International | Las Vegas | NV | — | ◇ UNVERIFIED |
| PBPabco Building Products | Newark | CA | — | ◇ UNVERIFIED |
| PBPabco Building Products and Sandia | North Las Vegas | NV | — | ◇ UNVERIFIED |
| PGPabco Gypsum | Redwood City | CA | — | ◇ UNVERIFIED |
| PGPabco Gypsum | Las Vegas | NV | — | ◇ UNVERIFIED |
| PMPerformance Minerals CORP | Chicago | IL | — | ◇ UNVERIFIED |
| PFProform Finishing Products - Atlanta | Duluth | GA | — | ◇ UNVERIFIED |
| QSQuality Soil Sciences | Bakersfield | CA | — | ◇ UNVERIFIED |
| QBQuanex Building Products | Rice Lake | WI | — | ◇ UNVERIFIED |
| QDQuicksilver Development CORP. | Mamaroneck | NY | — | ◇ UNVERIFIED |
| QBQuietrock By Pabco Gypsum | Newark | CA | — | ◇ UNVERIFIED |
| RNRaymond Norcal Group | Martinez | CA | — | ◇ UNVERIFIED |
| RLRoss Lighting CORP | Jesup | GA | — | ◇ UNVERIFIED |
| SESerious Energy, INC. | Newark | CA | — | ◇ UNVERIFIED |
| S2Southard 227 | Southard | OK | — | ◇ UNVERIFIED |
| SLStone Legends, INC. | Hayward | CA | — | ◇ UNVERIFIED |
| SPStony Point Facility | Stony Point | NY | — | ◇ UNVERIFIED |
| SOStudio Oz, LLC | Winter Haven | FL | — | ◇ UNVERIFIED |
| SRStudio Rondinone LLC | New York | NY | — | ◇ UNVERIFIED |
| SLSul4r-plus LLC | Marissa | IL | — | ◇ UNVERIFIED |
| SSSuperior Soils Supplements, LLC | Mendota | CA | — | ◇ UNVERIFIED |
| SSSurreal Sculptures | Pinellas Park | FL | — | ◇ UNVERIFIED |
| SWSweetwater Wallboard Facility | Sweetwater | TX | — | ◇ UNVERIFIED |
| TITin INC (dba Temple Inland West Memphis) | West Memphis | AR | — | ◇ UNVERIFIED |
| TMTkm Materials | Montgomery | NY | — | ◇ UNVERIFIED |
| TSTransload Solutions LLC | Stockton | CA | — | ◇ UNVERIFIED |
| UDUnited Design CORP Noble Facity | Nobile | OK | — | ◇ UNVERIFIED |
 United States Gypsum | Fremont | CA | — | ◇ UNVERIFIED |
| United States Gypsum CO | Stony Point | NY | — | ◇ UNVERIFIED |
| United States Gypsum CO | Boston | MA | — | ◇ UNVERIFIED |
| United States Gypsum Company | Crystal River | FL | — | ◇ UNVERIFIED |
| UCUsg CORP Research Center | Libertyville | IL | — | ◇ UNVERIFIED |
| USUsg Storage Site | Bremond | TX | — | ◇ UNVERIFIED |
| UGUS Gypsum CO | South Gate | CA | — | ◇ UNVERIFIED |
| UGUS Gypsum Company | Shoals | IN | — | ◇ UNVERIFIED |
| UGUS Gypsum Company - Denver Joint Plant | Denver | CO | — | ◇ UNVERIFIED |
| UGUS Gypsum Denver | Denver | CO | — | ◇ UNVERIFIED |
| UGUS Gypsum - Empire Plant | Empire | NV | — | ◇ UNVERIFIED |
| VPVasari Plaster and Stucco LLC Dba Vasari Lime Plaster & Paint | Ventura | CA | — | ◇ UNVERIFIED |
| VVVintage Verandah INC | Marion | AR | — | ◇ UNVERIFIED |
| WMWallboard Manufacturing | Santa Fe | NM | — | ◇ UNVERIFIED |
| WSWatco Switching Services LLC | Imperial | CA | — | ◇ UNVERIFIED |
| WMWestern Mining & Minerals Apex Plant | Las Vegas | NV | — | ◇ UNVERIFIED |
