| STShamrock Technologies INC | Newark | NJ | — | ◇ UNVERIFIED |
| SCShell Chemical LP - Martinez Catayst Plant | Martinez | CA | — | ◇ UNVERIFIED |
| SLShell Lubricants Fowlerville | Fowlerville | MI | — | ◇ UNVERIFIED |
| SCShrieve Chemical Services | Marlin | TX | — | ◇ UNVERIFIED |
| SESiemens Energy & Automation Incorporated | Roebuck | SC | — | ◇ UNVERIFIED |
| SOSigma-genosys of Texas | The Woodlands | TX | — | ◇ UNVERIFIED |
| SCSika CORP | Aurora | IL | — | ◇ UNVERIFIED |
| SCSmark CO | South Gate | CA | — | ◇ UNVERIFIED |
| SSSolid Start INC | Lakeland | FL | — | ◇ UNVERIFIED |
| SISolutia INC Krummrich Il (part) | Sauget | IL | — | ◇ UNVERIFIED |
| SUSolvay USA Midland | Midland | TX | — | ◇ UNVERIFIED |
 South Coast Terminals Strang Road Facility | La Porte | TX | — | ◇ UNVERIFIED |
| SLSouthwin LTD Nevada | Sparks | NV | — | ◇ UNVERIFIED |
| SLSpecchem, LLC | Kansas City | KS | — | ◇ UNVERIFIED |
| SCSternocandlelamp CO LLC | Memphis | TN | — | ◇ UNVERIFIED |
| SPStp Products Manufacturing CO | Painesville | OH | — | ◇ UNVERIFIED |
| SPStp Products Manufacturing Company | Vandalia | OH | — | ◇ UNVERIFIED |
| SCStruktol CO. of America | Villa Rica | GA | — | ◇ UNVERIFIED |
| SWSuez Wts USA INC | Addison | IL | — | ◇ UNVERIFIED |
| SWSuez Wts USA INC Beaumont - Plant | Beaumont | TX | — | ◇ UNVERIFIED |
| SCSyntech Cedar Port | Baytown | TX | — | ◇ UNVERIFIED |
| TCTaylor Chemical, INC. | Taylor | PA | — | ◇ UNVERIFIED |
| TOTeam Oil Tools | Tulsa | OK | — | ◇ UNVERIFIED |
| TITechnic INC | Cranston | RI | — | ◇ UNVERIFIED |
| TThunderline-z | Hampstead | NH | — | ◇ UNVERIFIED |
| TSTimpie Salt Processing Plant | Grantsville | UT | — | ◇ UNVERIFIED |
| TMTroy Manufacturing INC | Burton | OH | — | ◇ UNVERIFIED |
| UPUltra Pure Solutions INC | Castroville | CA | — | ◇ UNVERIFIED |
| UIUnited Industries Dba Chemsico | Saint Louis | MO | — | ◇ UNVERIFIED |
| USUnivar Solutions Powder Facility | Waxahachie | TX | — | ◇ UNVERIFIED |
| USUnivar Solutions Ssc Facility | Waxahachie | TX | — | ◇ UNVERIFIED |
| USUnivar Solutions Usa, LLC. Fka Dpc Enterprises, LP | Chattanooga | TN | — | ◇ UNVERIFIED |
| UAUS Army Pine Bluff Arsenal | Pine Bluff | AR | — | ◇ UNVERIFIED |
| UWUS Water Services INC | Cambridge | MN | — | ◇ UNVERIFIED |
| UIUyemura International Corporation | Southington | CT | — | ◇ UNVERIFIED |
| VEVeolia Es Technical Solutions Llc/ Onyx Env Services CO | Henderson | CO | — | ◇ UNVERIFIED |
| VUVesuvius USA Corporation - Cd (1318126134) | Brookpark | OH | — | ◇ UNVERIFIED |
| VTVoltarc Technologies INC | Waterbury | CT | — | ◇ UNVERIFIED |
| WCW2fuel - Crawfordsville Facility | Crawfordsville | IA | — | ◇ UNVERIFIED |
| WCWako Chemicals USA INC | Richmond | VA | — | ◇ UNVERIFIED |
| WCWalling Chemical Company | Sioux Falls | SD | — | ◇ UNVERIFIED |
| WTWater Treatment Specialist INC | Catano | PR | — | ◇ UNVERIFIED |
| WRWorld Resources Company | Tolleson | AZ | — | ◇ UNVERIFIED |
| WRW R Grace & CO -conn Grace Const Prod | North Bergen | NJ | — | ◇ UNVERIFIED |
| WRW R Grace & Company Conn Grace Construction Products | Lithonia | GA | — | ◇ UNVERIFIED |
| WRW R Grace & Company Incorporated | Clearfield | UT | — | ◇ UNVERIFIED |
| 2E2950 Executive Blvd | Mesquite | TX | 20–99 | ◐ LIKELY ACTIVE |
| 55913_12970 | Tumwater | WA | 20–99 | ◐ LIKELY ACTIVE |
| 77100 | Sauget | IL | 100–499 | ◐ LIKELY ACTIVE |
| ABA. Barber Excavating, LLC | Coventry | RI | — | ◐ LIKELY ACTIVE |
