| SCSasol Chemicals (USA) LLC | Tucson | AZ | Primary Metal Manufacturing331313 | 20-99 | ◐ LIKELY ACTIVE |
| SCSEK Corporation / Tobitt | Tucson | AZ | Nonmetallic Mineral Product Manufacturing327390 | 1-19 | ◐ LIKELY ACTIVE |
| STSigma Technologies Int'l LLC | Tucson | AZ | Plastics and Rubber Products Manufacturing326112 | 20-99 | ◐ LIKELY ACTIVE |
| SDSonoran Desert Winery | Tucson | AZ | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SPSouthwestern Paint & Supply LLC | Tucson | AZ | Chemical Manufacturing325510 | — | ◐ LIKELY ACTIVE |
Southwest Mobile Storage-Tucson | Tucson | AZ | Fabricated Metal Product Manufacturing332311 | 1-19 | ◐ LIKELY ACTIVE |
| SDSphereX Distillery | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| SGStafford Gregory | Tucson | AZ | Electrical Equipment, Appliance & Component Manufacturing335314 | — | ◐ LIKELY ACTIVE |
| SIState Industrial Supply CORP | Tucson | AZ | Fabricated Metal Product Manufacturing332722 | — | ◐ LIKELY ACTIVE |
| SYStock Yards Tucson | Tucson | AZ | Food Manufacturing311612 | 20-99 | ◐ LIKELY ACTIVE |
| SEStraight Engineering LLC | Tucson | AZ | Computer and Electronic Product Manufacturing334513 | — | ◐ LIKELY ACTIVE |
| STStratasys Tucson | Tucson | AZ | Machinery Manufacturing333248 | 1-19 | ◐ LIKELY ACTIVE |
| SCSugaro Corporation | Tucson | AZ | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| SPSundance Press | Tucson | AZ | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| STSupplyOne Tucson, Inc | Tucson | AZ | Paper Manufacturing322211 | 20-99 | ◐ LIKELY ACTIVE |
| SSSW Sun Control Products, Inc. | Tucson | AZ | Furniture and Related Product Manufacturing337920 | 20-99 | ◐ LIKELY ACTIVE |
| SSSyncardia Systems LLC | Tucson | AZ | Miscellaneous Manufacturing339113 | 20-99 | ◐ LIKELY ACTIVE |
| TDTaylor Distributor's, INC. | Tucson | AZ | Plastics and Rubber Products Manufacturing326199 | — | ◐ LIKELY ACTIVE |
| TDTeledyne Digital Imaging Us, INC | Tucson | AZ | Computer and Electronic Product Manufacturing334516 | — | ◐ LIKELY ACTIVE |
| TPTeledyne Photometrics | Tucson | AZ | Computer and Electronic Product Manufacturing334516 | 20-99 | ◐ LIKELY ACTIVE |
| TIThe Independent Distillery | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| TPThe Plant | Tucson | AZ | Apparel Manufacturing315990 | 20-99 | ◐ LIKELY ACTIVE |
| TWThree Wells Distilling Company | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| TCThunder Canyon Distillery | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| TMTony Martin Limb and Brace, LLC | Tucson | AZ | Miscellaneous Manufacturing339113 | — | ▲ REPORTED CLOSED |
| TUTown Under Black Distillery, L.l.c. | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| TBTRC-Tucson Blvd | Tucson | AZ | Chemical Manufacturing325510 | 20-99 | ◐ LIKELY ACTIVE |
| TTucson | Tucson | AZ | Beverage and Tobacco Product Manufacturing312111 | 1-19 | ◐ LIKELY ACTIVE |
| T0Tucson 04 | Tucson | AZ | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| TATucson AZ | Tucson | AZ | Miscellaneous Manufacturing339116 | 20-99 | ◐ LIKELY ACTIVE |
| TATucson AZ - Larson Camo | Tucson | AZ | Fabricated Metal Product Manufacturing332312 | 20-99 | ◐ LIKELY ACTIVE |
| TOTucson Optical Research Corporation | Tucson | AZ | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| TTTucson Trailer Company, INC. | Tucson | AZ | Transportation Equipment Manufacturing336212 | — | ◐ LIKELY ACTIVE |
| UOUniversity of Arizona Food Products & Safety Lab | Tucson | AZ | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| VFValley Fever Solutions INC | Tucson | AZ | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| VLVentech, LLC | Tucson | AZ | Computer and Electronic Product Manufacturing334111 | — | ◐ LIKELY ACTIVE |
| VWVertigo Wines | Tucson | AZ | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| VNVigneto Nannini | Tucson | AZ | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| VTVulcan Tooling LLC | Tucson | AZ | Fabricated Metal Product Manufacturing332710 | — | ◐ LIKELY ACTIVE |
| WDWhiskey Del Bac | Tucson | AZ | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
| YLYESCO LLC Tucson AZ | Tucson | AZ | Miscellaneous Manufacturing339950 | 1-19 | ◐ LIKELY ACTIVE |
| ZEZoom Envelope LLC | Tucson | AZ | Plastics and Rubber Products Manufacturing326111 | — | ◐ LIKELY ACTIVE |
| 3A309th Aerospace Maintenance and Regeneration Group | Tucson | AZ | Transportation Equipment Manufacturing336411 | — | ◇ UNVERIFIED |
| 4T4d Technology Corporation | Tucson | AZ | Machinery Manufacturing333242 | — | ◇ UNVERIFIED |
| 5T56nd Tucson Excavating (chemtreat Containers) | Tucson | AZ | Chemical Manufacturing325998 | — | ◇ UNVERIFIED |
| AIA1FAB, Inc. | Tucson | AZ | Fabricated Metal Product Manufacturing332313 | — | ◇ UNVERIFIED |
| AMAbbott Metal Fab, L.l.c. | Tucson | AZ | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| ATAbsolute Turning & Machine, INC. | Tucson | AZ | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| APAccent Products | Tucson | AZ | Plastics and Rubber Products Manufacturing326191 | — | ◇ UNVERIFIED |
| AIAddisings INC | Tucson | AZ | Miscellaneous Manufacturing339950 | — | ◇ UNVERIFIED |