| SLSeemac Lumber LLC | Boston | KY | — | ◇ UNVERIFIED |
| SMSelect Millwork | Plainwell | MI | — | ◇ UNVERIFIED |
| SLSell Lumber Corporation | Redding | CA | — | ◇ UNVERIFIED |
| SCSequoia Custom Cabinetry INC | Sanger | CA | — | ◇ UNVERIFIED |
| SFSequoia Forest Products | Arcata | CA | — | ◇ UNVERIFIED |
| SIServmax, INC. | Wilmington | NC | — | ◇ UNVERIFIED |
| SMSeymour Manufacturing Company Incorporated | Seymour | IN | — | ◇ UNVERIFIED |
| STShade Tree Woodcraft | Harlingen | TX | — | ◇ UNVERIFIED |
| SPShaffer Products, LLC | Greencastle | PA | — | ◇ UNVERIFIED |
| SFShasta Forest Products INC | Yreka | CA | — | ◇ UNVERIFIED |
| SPShaver Properties, INC. | Vero Beach | FL | — | ◇ UNVERIFIED |
| STShaw's Tree Service | Jacksonville | FL | — | ◇ UNVERIFIED |
| SWShaw Woodworking, INC. | Cotuit | MA | — | ◇ UNVERIFIED |
| SCShivers Custom Woodwork, LLC | Katy | TX | — | ◇ UNVERIFIED |
| SBShuler Brothers Chipping CO. | Opp | AL | — | ◇ UNVERIFIED |
| SBShutters By Angel | Lancaster | CA | — | ◇ UNVERIFIED |
| SSShutter Shop, INC. | Charlotte | NC | — | ◇ UNVERIFIED |
| SWSider's Woodcrafting LLC | Brewer | ME | — | ◇ UNVERIFIED |
| SLSierra Log Homes | Chico | CA | — | ◇ UNVERIFIED |
| SPSierra Pacific Ind | Susanville | CA | — | ◇ UNVERIFIED |
| SPSierra Pacific Ind-chinese Camp Division | Chinese Camp | CA | — | ◇ UNVERIFIED |
 Sierra Pacific Industries | Jamestown | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Susanville | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Camino | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries - Martell | Martell | CA | — | ◇ UNVERIFIED |
| SBSiller Bros INC | Anderson | CA | — | ◇ UNVERIFIED |
| SCSilva's Cabinet Shop | Newark | CA | — | ◇ UNVERIFIED |
| SBSims Bark of Georgia LLC | Crothersville | IN | — | ◇ UNVERIFIED |
| SFSindelar Fine Woodworking, Inc. | Granger | IN | — | ◇ UNVERIFIED |
| SRSingleton Reels Inc. | Rootstown | OH | — | ◇ UNVERIFIED |
| SCSmart Craft Technologies, INC. | Reno | NV | — | ◇ UNVERIFIED |
| S3Smink 3 LLC | Dallas | TX | — | ◇ UNVERIFIED |
| SMSmith Manufacturing | Benton Harbor | MI | — | ◇ UNVERIFIED |
| SSSmith Steps, INC. | Live Oak | FL | — | ◇ UNVERIFIED |
| STSmith Textile Apron | Gastonia | NC | — | ◇ UNVERIFIED |
| SASmk Associates INC. | Astoria | NY | — | ◇ UNVERIFIED |
| SLSnider Lumber Products CO | Turlock | CA | — | ◇ UNVERIFIED |
| SSSoil Sollutions Company | Shipshewana | IN | — | ◇ UNVERIFIED |
| SISoliman Investments III LLC | Columbus | OH | — | ◇ UNVERIFIED |
| SUSomething Unique Designs | Littleton | CO | — | ◇ UNVERIFIED |
| SHSoutheastern Hardwoods, Inc. | Swannanoa | NC | — | ◇ UNVERIFIED |
| SISouthern Indiana Sawmill LLC | Greenville | IN | — | ◇ UNVERIFIED |
| SMSouthern Moulding LLC | Kennesaw | GA | — | ◇ UNVERIFIED |
| SNSouthern New Hampshire Fire Wood, LLC | Hudson | NH | — | ◇ UNVERIFIED |
| STSouthern Timber Products LLC | Ruther Glen | VA | — | ◇ UNVERIFIED |
| SWSouthern Wood Suppliers, INC. | Oglethorpe | GA | — | ◇ UNVERIFIED |
| SRSouthwest Renewable Brown Street Mill | Snowflake | AZ | — | ◇ UNVERIFIED |
| SMSpace Manufacturers Corporation | Geneva | NY | — | ◇ UNVERIFIED |
| SISpecialty, INC. | Homedale | ID | — | ◇ UNVERIFIED |
| SLSpecialty Lumber Company ** Inactive ** | Wilsons Mills | NC | — | ◇ UNVERIFIED |
| SWSpecialty Wood Products | Lodi | CA | — | ◇ UNVERIFIED |
| SCSpectrum Custom Design, INC | Desert Hot Springs | CA | — | ◇ UNVERIFIED |
| SESpectrum Energy Georgia, LLC | Adel | GA | — | ◇ UNVERIFIED |
| SLSpencer LLC Monroe | Monroe | WA | — | ◇ UNVERIFIED |
| SCSpencer's Custom Wood LLC | Elgin | TX | — | ◇ UNVERIFIED |
| SOSpirit of the Woods, Inc | Jackman | ME | — | ◇ UNVERIFIED |
| SSS& S Wood Products | Independence | WI | — | ◇ UNVERIFIED |
| SIStan's Industrial Manufacturing LLC | Lyndon Station | WI | — | ◇ UNVERIFIED |
| STStarwood Trim INC | Frisco | TX | — | ◇ UNVERIFIED |
| SLStashwood LLC | San Tan Valley | AZ | — | ◇ UNVERIFIED |
| SKSteigerwald's Kitchen & Bath, INC. | Grove City | PA | — | ◇ UNVERIFIED |
| SCStella-jones Corporation | Durant | MS | — | ◇ UNVERIFIED |
 Sterling Site Access Solutions | Lufkin | TX | — | ◇ UNVERIFIED |
| SASteves and Sons Door Company | San Antonio | TX | — | ◇ UNVERIFIED |
| SCStewart Custom Wood Works, INC. | Alpharetta | GA | — | ◇ UNVERIFIED |
| SPStewarts Point Woodworks LLC | Cazadero | CA | — | ◇ UNVERIFIED |
| SWSTL Woodworking Inc. | Saint Louis | MO | — | ◇ UNVERIFIED |
| SWStockton Wood Shavings Company | French Camp | CA | — | ◇ UNVERIFIED |
| SWStock Woodwork | Laredo | TX | — | ◇ UNVERIFIED |
| SFStone Forest Industries, INC. | Happy Camp | CA | — | ◇ UNVERIFIED |
| SPStorage Pro Manufacturing LLC | Creola | AL | — | ◇ UNVERIFIED |
| SSStorage Systems, INC | Fresno | CA | — | ◇ UNVERIFIED |
| SIStratis Industries | Centuria | WI | — | ◇ UNVERIFIED |
| SIStructural Industries, INC. | Bohemia | NY | — | ◇ UNVERIFIED |
| SIStructural Insulated Panels Texas | Kerrville | TX | — | ◇ UNVERIFIED |
| SPSturdi Products Company | Portland | OR | — | ◇ UNVERIFIED |
| SHSTW Holdings, LLC | Fleetwood | PA | — | ◇ UNVERIFIED |
| SCSunspot Creative Services | Bellingham | WA | — | ◇ UNVERIFIED |
| SVSun Valley Closet Company, INC | Hailey | ID | — | ◇ UNVERIFIED |
| SLSuperiornova, LLC | Arlington | VA | — | ◇ UNVERIFIED |
| SPSuperior Pellet Fuels, LLC | North Pole | AK | — | ◇ UNVERIFIED |
| STSuperior Trim & Door, INC. | Apopka | FL | — | ◇ UNVERIFIED |
| SCSustainable Casework Industries | Deerfield Beach | FL | — | ◇ UNVERIFIED |
| SCSwan & CO Innovations LLC | Charlotte | NC | — | ◇ UNVERIFIED |
| SPSykes Post Processing | Elkin | NC | — | ◇ UNVERIFIED |
| TPTabco Precision | Fallbrook | CA | — | ◇ UNVERIFIED |
| TWTalco Woodcrafters INC | Talco | TX | — | ◇ UNVERIFIED |
| TPTali Pak Lumber Services LLC | Hopland | CA | — | ◇ UNVERIFIED |
| TTTampa Truss Company, LLC | Plant City | FL | — | ◇ UNVERIFIED |
| TPTasler Pallet INC. | Marietta | OK | — | ◇ UNVERIFIED |
| TSTate Stclair Enterprises LLC | Wolfforth | TX | — | ◇ UNVERIFIED |
| TPTcc Pennwest, LLC | Emlenton | PA | — | ◇ UNVERIFIED |
| TETDE Enterprises, Inc. | Wolverine Lake | MI | — | ◇ UNVERIFIED |
| TDT & D Timber Products | Biddeford | ME | — | ◇ UNVERIFIED |
| TWTeak Warehouse, INC. | Redondo Beach | CA | — | ◇ UNVERIFIED |
| TFTechnical Finishing Services INC | Minneapolis | MN | — | ◇ UNVERIFIED |
| TSTennessee Stave LLC | Waverly | TN | — | ◇ UNVERIFIED |
| TFTerra Firma Foundation, LLC | Alvin | TX | — | ◇ UNVERIFIED |
 Terra Three Industries LLC | Allendale | MI | — | ◇ UNVERIFIED |
| TITeutonia Industrial LLC | Milwaukee | WI | — | ◇ UNVERIFIED |
