| SPSierra Pacific Ind-chinese Camp Division | Chinese Camp | CA | — | ◇ UNVERIFIED |
| SPSierra Pacific Ind. - Shasta L | Shasta Lake | CA | — | ◇ UNVERIFIED |
 Sierra Pacific Industries | Quincy | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Central Valley | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Lincoln | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Arcata | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Burney | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Burney | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries | Loyalton | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries (2042-rd) | Red Bluff | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries - Arcata Division | Arcata | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries - Keystone Bark Plant | Jamestown | CA | — | ◇ UNVERIFIED |
| Sierra Pacific Industries - Shelton | Shelton | WA | — | ◇ UNVERIFIED |
| SFSigla Furniture CORP | Los Angeles | CA | — | ◇ UNVERIFIED |
| SBSignature Building Systems of Pennsylvania, LLC | Moosic | PA | — | ◇ UNVERIFIED |
| SBSiller Bros INC | Anderson | CA | — | ◇ UNVERIFIED |
| SBSilver Bay Logging Wrangell Sawmill | Wrangell | AK | — | ◇ UNVERIFIED |
| SLSimmons Logging, LLC | Toone | TN | — | ◇ UNVERIFIED |
| SLSimpson Lumber Company, LLC | Tacoma | WA | — | ◇ UNVERIFIED |
| STSimpson Timber CO Commencement Bay Opr | Tacoma | WA | — | ◇ UNVERIFIED |
| STSimpson Timber CO St Yd Sawmill 5 | Shelton | WA | — | ◇ UNVERIFIED |
| SIS Industries INC | Somis | CA | — | ◇ UNVERIFIED |
| SHSingh Hardwood Company, INC. | Far Rockaway aka Arverne | NY | — | ◇ UNVERIFIED |
| SLSiwek Lumber and Millwork INC | Jordan | MN | — | ◇ UNVERIFIED |
| SLSkidmore Lumber Co., LLC | Freeburg | MO | — | ◇ UNVERIFIED |
| SKS & K Industries, INC. | Columbia | MO | — | ◇ UNVERIFIED |
| SKS & K Industries INC - Bldg #2 | Lexington | MO | — | ◇ UNVERIFIED |
| SKS & K Industries Inc-s & K Industries INC B #2 | Lexington | MO | — | ◇ UNVERIFIED |
| SKS K Lumber | Cochranton | PA | — | ◇ UNVERIFIED |
| SKS K N Lumber INC | Elgin | OR | — | ◇ UNVERIFIED |
| SLSkookum Lumber Plant | Shelton | WA | — | ◇ UNVERIFIED |
| SPSkyline Post and Pole Limited Liability Company | Louisa | VA | — | ◇ UNVERIFIED |
| SCSlade's Custom Sawmill | Providence | NC | — | ◇ UNVERIFIED |
| SRSlice Recovery INC | Coquille | OR | — | ◇ UNVERIFIED |
| SLSmallwood Lumber CO LLC | Frenchburg | KY | — | ◇ UNVERIFIED |
| SMS M C Lumber CO INC | Pulaski | TN | — | ◇ UNVERIFIED |
| SBSmith Brothers Lumber | Hartford | KY | — | ◇ UNVERIFIED |
| SFSmith Flooring INC | Winona | MO | — | ◇ UNVERIFIED |
| SHSmoke House Lumber Company | Warrenton | NC | — | ◇ UNVERIFIED |
| SISmoothbore International, INC. | Red Creek | NY | — | ◇ UNVERIFIED |
| SFSnavely Forest Products Company | Westminster | MD | — | ◇ UNVERIFIED |
| SISnider Industries Sawmill | Marshall | TX | — | ◇ UNVERIFIED |
| S6Snowball 6.0, LLC | New Plymouth | ID | — | ◇ UNVERIFIED |
| SHSnow Hill Chip Mill | Snow Hill | NC | — | ◇ UNVERIFIED |
| SSSnow Shoe Refractories Llc/clarence Plt | Snow Shoe | PA | — | ◇ UNVERIFIED |
| SISocco INC | Sumas | WA | — | ◇ UNVERIFIED |
| SSSolt's Sawmill | Mertztown | PA | — | ◇ UNVERIFIED |
| SPSomerset Pellet Fuel | Science Hill | KY | — | ◇ UNVERIFIED |
| SWSomerset Wood Products in | Burnside | KY | — | ◇ UNVERIFIED |
| SLSouthbound Lumber, LLC | Bainbridge | OH | — | ◇ UNVERIFIED |
