Hughes Brothers INC | Seward | NE | 100–499 | ● ACTIVE |
Lone Star Specialty Products, LLC | Lone Star | TX | — | ● ACTIVE |
Marks-miller Post and Pole, Incorporated | Clancy | MT | 20–99 | ● ACTIVE |
Missouri Tie LLC | Bunker | MO | 20–99 | ● ACTIVE |
Permapost Products CO | Hillsboro | OR | — | ● ACTIVE |
S.i. Storey Lumber Co., INC. | Armuchee | GA | 20–99 | ● ACTIVE |
Aluma-form, INC. | Memphis | TN | — | ● ACTIVE |
| MWMadison Wood Preservers, Incorporated | Madison | VA | 100–499 | ● ACTIVE |
Beach Timber Company Blackshear, LLC | Blackshear | GA | — | ● ACTIVE |
Equity Technical Services, LLC | Oklahoma City | OK | — | ● ACTIVE |
Fire Barrier Technologies, LLC | Monroe | GA | — | ● ACTIVE |
Kiln Dried Wood Company LLC | Waynesville | OH | — | ● ACTIVE |
| KUKoppers Utility and Industrial Products INC. | Eutawville | SC | — | ● ACTIVE |
Kragon Historical Preservation, INC | Lawrenceburg | KY | — | ● ACTIVE |
| MLMarine Lumber & Piling LLC | Barnegat | NJ | — | ● ACTIVE |
Phytosanitation Vacuum Systems, LLC | Blacksburg | VA | — | ● ACTIVE |
| SCStella-jones CORP | Tacoma | WA | — | ● ACTIVE |
T2earth LLC | Evans | GA | — | ● ACTIVE |
The Craftsmen Group, INC | Brentwood | MD | — | ● ACTIVE |
Thomasson Company | Philadelphia | MS | — | ● ACTIVE |
Wheeler Lumber LLC | Eden Prairie | MN | — | ● ACTIVE |
| AWAllweather Wood | North Bend | OR | 20–99 | ◐ LIKELY ACTIVE |
| AWAllweather Wood Treaters | White City | OR | 20–99 | ◐ LIKELY ACTIVE |
| AWAnthony Wood Treating, INC. | Hope | AR | 20–99 | ◐ LIKELY ACTIVE |
| APApalachee Pole CO INC | Bristol | FL | 1–19 | ◐ LIKELY ACTIVE |
| ALArnold Lumber Company INC | Bonifay | FL | 1–19 | ◐ LIKELY ACTIVE |
| BSBestway South, INC. | Stony Point | NC | 20–99 | ◐ LIKELY ACTIVE |
| CPCarpenter Pole & Piling Co., INC. | Wiggins | MS | 20–99 | ◐ LIKELY ACTIVE |
Chemco, INC. | Ferndale | WA | — | ◐ LIKELY ACTIVE |
| CMC M Tucker Lumber Corporation | Pageland | SC | 100–499 | ◐ LIKELY ACTIVE |
| CMC M Tucker Lumber of Rock Hill LLC | Rock Hill | SC | 20–99 | ◐ LIKELY ACTIVE |
| CLCpp LLC | Picayune | MS | 1–19 | ◐ LIKELY ACTIVE |
| CWCulpeper Wood Preservers | Shelbyville | IN | 20–99 | ◐ LIKELY ACTIVE |
| CWCulpeper Wood Preservers, INC. | Culpeper | VA | 20–99 | ◐ LIKELY ACTIVE |
| CWCulpeper Wood Preservers of Columbia INC. | Columbia | SC | 20–99 | ◐ LIKELY ACTIVE |
| COCulpepper of Orangeburg LLC | Orangeburg | SC | 20–99 | ◐ LIKELY ACTIVE |
| DTDesoto Treated Materials INC | Wiggins | MS | 20–99 | ◐ LIKELY ACTIVE |
| FWFontana Wood Treating INC | Fontana | CA | 20–99 | ◐ LIKELY ACTIVE |
| FSFree State Lumber CO INC | Haleyville | AL | 20–99 | ◐ LIKELY ACTIVE |
Great Southern Wood | Hagerstown | MD | 20–99 | ◐ LIKELY ACTIVE |
Great Southern Wood - Buckner, INC | Buckner | MO | 20–99 | ◐ LIKELY ACTIVE |
Great Southern Wood of Texas | Columbus | TX | 20–99 | ◐ LIKELY ACTIVE |
Great Southern Wood Preserving INC | Irvington | AL | 20–99 | ◐ LIKELY ACTIVE |
Great Southern Wood Preserving Incorporated | Conyers | GA | 100–499 | ◐ LIKELY ACTIVE |
| HTHoover Treated Wood Products, INC. | Bakersfield | CA | 20–99 | ◐ LIKELY ACTIVE |
| HTHoover Treated Wood Products Milford | Milford | VA | 20–99 | ◐ LIKELY ACTIVE |
| HTHoover Treated Wood Products Oxford Facility | Oxford | PA | 20–99 | ◐ LIKELY ACTIVE |
| JLJulian Lumber Company, INC | Antlers | OK | 20–99 | ◐ LIKELY ACTIVE |
Louisiana Pacific | Watkins | MN | 20–99 | ◐ LIKELY ACTIVE |
| MWMellott Wood Preserving CO INC | Needmore | PA | 20–99 | ◐ LIKELY ACTIVE |