| PHPortable Hot Mix Asphalt Plant #3 (p0014039) | Carbon | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (ct-11720) | Weston County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (ct-1329) | Teton County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (ct-2303) | Platte County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant: Ct-2303 | Laramie County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (md-11849) | Sheridan | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (md-12003) | Johnson County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (md-12024) | Laramie | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (md-8890) | Sheridan | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (p0014039) | Converse | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (p0021292) | Park | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (p0022842) | Natrona | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (p0024119) | Natrona | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Asphalt Plant (re-25) | Fremont County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PHPortable Hot Mix Plant (ct-1919) | Park County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PKPortable Kolberg Pugmill | Natrona County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| PLPortable Lo-pro 250 Concrete Batch Plant | Albany | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| PMPortable Mix Unit Simplot Soilbuilders (ct-1123) | Park County | WY | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| PSPortable Screening Equipment | Johnson County | WY | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| PSPortable Screening Equipment | Atlantic City | WY | Machinery Manufacturing333131 | — | ◇ UNVERIFIED |
| PGPowell Garage Door | Powell | WY | Fabricated Metal Product Manufacturing332321 | — | ◇ UNVERIFIED |
| PCPuregro Company | Worland | WY | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| PLPushroot Lagerhaus LLC | Lander | WY | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| RARawlins Asphalt Hot Plant (ct-1225) | Rawlins | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| R1Re-123 (mcnelius 1-2) | Converse | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RPRe-126 (rawlins Plant 1-3) | Carbon | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RMRe-142: Moorcroft Batch Plant | Crook | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| R1Re-7502 (rexcon 1-7 Central B | Natrona County | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| R1Re-7578 (rexcon 1-8) | Campbell County | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| RMReed Machine and Fabrication LLC | Green River | WY | Machinery Manufacturing333517 | — | ◇ UNVERIFIED |
| RMReliable Mix Rmx 100 | Medicine Bow | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| ROReliance Operations Facility | Reliance | WY | Chemical Manufacturing325199 | — | ◇ UNVERIFIED |
| RCRex - Coal Based Activated Ca | Gillette | WY | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| RHRiverton Hot Asphalt Plant (ct-864) | Fremont County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| RTRockin' T-Shirts by Dizzy Graphix LLC | Cheyenne | WY | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| RSRock Springs Coal Calcining Plant | Sweetwater | WY | Petroleum and Coal Products Manufacturing324199 | — | ◇ UNVERIFIED |
| RSRock Springs Fertilizer Complex | Sweetwater | WY | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
| RKRoyce Kelley Sawmill | Saratoga | WY | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SISafeway INC | Sheridan | WY | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| SMSaratoga Mill | Carbon | WY | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
 Schlosser Signs INC. | Cheyenne | WY | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| SHSchwan's Home Service, Inc.: | Powell | WY | Food Manufacturing311520 | — | ◇ UNVERIFIED |
| SWSheridan Wood Products | Sheridan County | WY | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SCShute Creek Treating Facility | Lincoln | WY | Chemical Manufacturing325120 | — | ◇ UNVERIFIED |
| SASimon Aesco Madsen Portable B | Laramie County | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SASimon Aesco Madsen Portable Bc Plant | Laramie | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SCSimon Contractors | Laramie | WY | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SPSimon Portable Bc Plant #5 | Crook | WY | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SISimple Injection LLC | Casper | WY | Machinery Manufacturing333996 | — | ◇ UNVERIFIED |
| SPSimplot Phosphates LLC | Rock Springs | WY | Chemical Manufacturing325312 | — | ◇ UNVERIFIED |
