| SASt. Anthony Simplot Grower Solutions | St. Anthony | ID | Chemical Manufacturing325314 | — | ◇ UNVERIFIED |
| SMStar Media Promotions, INC. | Meridian | ID | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| SGSteelhead Graphics LLC | Meridian | ID | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SLStimson Lumber Company Atlas Mill Site | Coeur D Alene | ID | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SLStimson Lumber Company Plummer Mill | Plummer | ID | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| SSStinker Store 079 | Burley | ID | Machinery Manufacturing333913 | — | ◇ UNVERIFIED |
| SLSt Luke's Health System Consolidated Service Center | Meridian | ID | Chemical Manufacturing325412 | — | ◇ UNVERIFIED |
| SMSt Maries Creosote Site | St Maries | ID | Wood Product Manufacturing321114 | — | ◇ UNVERIFIED |
| SBSugar Bear Holdings, LLC | Boise | ID | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| SMSummit Mold, INC. | Post Falls | ID | Machinery Manufacturing333249 | — | ◇ UNVERIFIED |
| SPSummit Point LLC | Idaho Falls | ID | Food Manufacturing311423 | — | ◇ UNVERIFIED |
| SCSuncore Construction & Materials 00552 | Idaho Falls | ID | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| SOSunriver of Idaho, INC. | Aberdeen | ID | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| SCSunroc Corporation | Boise | ID | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SCSunroc Corporation | Caldwell | ID | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SSSunroc Site | Garden City | ID | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| SUSun Up Flyers, LLC | Moscow | ID | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| SVSun Valley Bronze, Inc. | Bellevue | ID | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| SVSun Valley Closet Company, INC | Hailey | ID | Wood Product Manufacturing321999 | — | ◇ UNVERIFIED |
| SGSuperior Granite of Idaho | Garden City | ID | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| SLSwanky LLC | Melba | ID | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
 Swire Pacific Holdings, INC. | Pocatello | ID | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| SPSwire Pacific Holdings LTD | Twin Falls | ID | Beverage and Tobacco Product Manufacturing312111 | — | ◇ UNVERIFIED |
| SWSw Wa LLC | Boise | ID | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| SLSyphon LLC | Rigby | ID | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| TLTakat, LLC | White Bird | ID | Computer and Electronic Product Manufacturing334310 | — | ◇ UNVERIFIED |
| TMTamarack Mill LLC | Kooskia | ID | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| TMTamarack Mills | Council | ID | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| TWTap Worldwide, LLC | Post Falls | ID | Transportation Equipment Manufacturing336399 | — | ◇ UNVERIFIED |
| T6Tesoro 62161 | Moscow | ID | Machinery Manufacturing333913 | — | ◇ UNVERIFIED |
| TKTessenderlo Kerley INC | Burley | ID | Chemical Manufacturing325320 | — | ◇ UNVERIFIED |
| TLTeton Leather LLC | Idaho Falls | ID | Leather and Allied Product Manufacturing316110 | — | ◇ UNVERIFIED |
| TTTeton Trailer Manufacturing LLC | Idaho Falls | ID | Transportation Equipment Manufacturing336212 | — | ◇ UNVERIFIED |
| TAThe Ace Co, INC. | Boise | ID | Computer and Electronic Product Manufacturing334413 | — | ◇ UNVERIFIED |
| TAThe Azek Company | Boise | ID | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| TCThe Commons 2019 Revocable Trust | Bellevue | ID | Fabricated Metal Product Manufacturing332510 | — | ◇ UNVERIFIED |
| TGThe Gardens, LLC | Hailey | ID | Food Manufacturing311811 | — | ◇ UNVERIFIED |
| TIThe Idaho Shirt Shack, LLC | Nampa | ID | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| TSThe Sign Center LLC | Boise | ID | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |
| TTThe Teff Company | Boise | ID | Food Manufacturing311211 | — | ◇ UNVERIFIED |
| TCThomas C. Luthy | Rexburg | ID | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| TRThom Real Estate Holding LLC | Post Falls | ID | Fabricated Metal Product Manufacturing332994 | — | ◇ UNVERIFIED |
| TDThree D Stoneworks | Pollock | ID | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| TIThunderbird Irrigation of Idaho | American Falls | ID | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| TLTimberline Lumber INC. | Lewiston | ID | Wood Product Manufacturing321113 | — | ◇ UNVERIFIED |
| TFTitan Fuel Tanks | Idaho Falls | ID | Transportation Equipment Manufacturing336390 | — | ◇ UNVERIFIED |
| TITopsail Inc. | Nampa | ID | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| TITopsail Inc. | Nampa | ID | Transportation Equipment Manufacturing336612 | — | ◇ UNVERIFIED |
| TITransguard INC. | Boise | ID | Furniture and Related Product Manufacturing337215 | — | ◇ UNVERIFIED |
| TVTreasure Valley Granite, INC. | Garden City | ID | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
