| HPHills Products Group | Whitewood | SD | — | ◇ UNVERIFIED |
| HLHixson Lumber Company, LLC | Milan | TN | — | ◇ UNVERIFIED |
| HLHixson Lumber Company, LLC | Pine Bluff | AR | — | ◇ UNVERIFIED |
| HLHixson Lumber Company - Magnolia | Magnolia | AR | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales | Gilmer | TX | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales | Caddo Mills | TX | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales, INC. | Plumerville | AR | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales of Illinois INC | Hillsboro | IL | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales of Illinois, INC. | Streator | IL | — | ◇ UNVERIFIED |
| HLHixson Lumber Sales of Louisiana INC | Winnfield | LA | — | ◇ UNVERIFIED |
| HMH. M. Stauffer & Sons INC | Leola | PA | — | ◇ UNVERIFIED |
| HWHonolulu Wood Treating LLC | Kapolei | HI | — | ◇ UNVERIFIED |
| HTHoover Treated Wood Products | Pine Bluff | AR | — | ◇ UNVERIFIED |
| HTHoover Treated Wood Products INC | Thomson | GA | — | ◇ UNVERIFIED |
| HTHoover Treated Wood Products, INC. | Halifax | NC | — | ◇ UNVERIFIED |
| HTHoover Treated Wood Products, INC. | Detroit | MI | — | ◇ UNVERIFIED |
| HPHuxford Pole & Timber CO. INC. | Atmore | AL | — | ◇ UNVERIFIED |
| HIHydrolake INC | Mc Bain | MI | — | ◇ UNVERIFIED |
| ITIdaho Timer CORP of Illinois | Rochelle | IL | — | ◇ UNVERIFIED |
| IFInternational Forest Products | Houston | TX | — | ◇ UNVERIFIED |
| IWIowa Wood Preservers INC | Oskaloosa | IA | — | ◇ UNVERIFIED |
| JAJohn a Biewer CO of Illinois | Seneca | IL | — | ◇ UNVERIFIED |
| KFKeystone Fence Supply CO LLC | Schaefferstown | PA | — | ◇ UNVERIFIED |
| KIKoppers, INC. | Guthrie | KY | — | ◇ UNVERIFIED |
| KIKoppers, INC. | North Little Rock | AR | — | ◇ UNVERIFIED |
| KIKoppers Incorporated Salem Plant | Salem | VA | — | ◇ UNVERIFIED |
| KIKoppers INC (susquehana Pa) | Montgomery | PA | — | ◇ UNVERIFIED |
| KIKoppers Industries | Somerville | TX | — | ◇ UNVERIFIED |
| KIKoppers Industries Incorporated | Florence | SC | — | ◇ UNVERIFIED |
| KUKoppers Utility & Industrial Products INC - Kennedy Plant | Kennedy | AL | — | ◇ UNVERIFIED |
| LOLand O Lakes Wood Preserving CO | Tenstrike | MN | — | ◇ UNVERIFIED |
| LFLangdale Forest Prods CO | Sweetwater | TN | — | ◇ UNVERIFIED |
| LCLavelle Company | Fargo | ND | — | ◇ UNVERIFIED |
| LLLong Life Treated Wood | Hebron | MD | — | ◇ UNVERIFIED |
 Louisiana Pacific CORP. Silsbee Tx | Silsbee | TX | — | ◇ UNVERIFIED |
| MTMaderas Tratadas (former Boricua Wood) | Toa Baja | PR | — | ◇ UNVERIFIED |
| MLMcarthur Lumber and Post | Mc Arthur | OH | — | ◇ UNVERIFIED |
| MCMcfarland Cascade Pole and Lumber | Eugene | OR | — | ◇ UNVERIFIED |
| MIMenard INC Midwest Mfg & Dist | Eau Claire | WI | — | ◇ UNVERIFIED |
| MEMerit Energy Company, LLC - Tobey Compressor Station | Charleston | AR | — | ◇ UNVERIFIED |
| MWMid-states Wood Preservers LLC | Simsboro | LA | — | ◇ UNVERIFIED |
| MMMidwest Manufacturing Treating Plant | Plano | IL | — | ◇ UNVERIFIED |
| MMMidwest Mfg Holiday City Treating Plant | Holiday City | OH | — | ◇ UNVERIFIED |
| MMMidwest Mfg Valley Treating Plant | Valley | NE | — | ◇ UNVERIFIED |
| MTMidwest Timber INC | Edwardsburg | MI | — | ◇ UNVERIFIED |
 Missouri Tie LLC | Reynolds | MO | — | ◇ UNVERIFIED |
| NANaval Air Station Pensacola | Pensacola | FL | — | ◇ UNVERIFIED |
| NTNortheast Treaters INC | Belchertown | MA | — | ◇ UNVERIFIED |
| ODOilfield Division | Lufkin | TX | — | ◇ UNVERIFIED |
| OIOsmose INC | Rock Hill | SC | — | ◇ UNVERIFIED |
