| MEMitsubishi Electric Automotive America (1483090295) | Mason | OH | Transportation Equipment Manufacturing336310 | 100-499 | ◐ LIKELY ACTIVE |
| AMArmor Metal Group | Mason | OH | Primary Metal Manufacturing331521 | 100-499 | ◐ LIKELY ACTIVE |
| BCBerenfield Containers INC | Mason | OH | Fabricated Metal Product Manufacturing332439 | — | ◐ LIKELY ACTIVE |
| NMNitrex Metal Technologies INC | Mason | MI | Fabricated Metal Product Manufacturing332811 | — | ◐ LIKELY ACTIVE |
Armor Metal Group Mason, INC. | Mason | OH | Fabricated Metal Product Manufacturing332439 | — | ◐ LIKELY ACTIVE |
| CLClean Lites | Mason | MI | Chemical Manufacturing325998 | — | ◐ LIKELY ACTIVE |
| DMDeerfield Manufacturing, Inc. d/b/a Ice Industries Deerfield | Mason | OH | Fabricated Metal Product Manufacturing332116 | 100-499 | ◐ LIKELY ACTIVE |
| GMGestamp Mason | Mason | MI | Fabricated Metal Product Manufacturing332811 | 100-499 | ◐ LIKELY ACTIVE |
| HMHi-tek Manufacturing INC | Mason | OH | Fabricated Metal Product Manufacturing332710 | 100-499 | ◐ LIKELY ACTIVE |
| SWSaba Winery | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SBSonder Brewing, LLC | Mason | OH | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| APAprecia Pharmaceuticals, LLC | Mason | OH | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| DCDart Container of Michigan LLC | Mason | MI | Plastics and Rubber Products Manufacturing326140 | — | ◐ LIKELY ACTIVE |
| FAFujitec America, INC. (1483000504) | Mason | OH | Machinery Manufacturing333921 | — | ◐ LIKELY ACTIVE |
| OOOrchid Orthopedics Solutions | Mason | MI | Miscellaneous Manufacturing339112 | — | ◐ LIKELY ACTIVE |
| 0G0g32 Global Chain Supply Management | Mason | OH | Apparel Manufacturing315280 | 20-99 | ◐ LIKELY ACTIVE |
| AWAshley Ward | Mason | OH | Fabricated Metal Product Manufacturing332722 | 20-99 | ◐ LIKELY ACTIVE |
| BTBent Tree Winery | Mason | OH | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BBlackmon | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CSCapital steel and wire, Eden rd | Mason | MI | Primary Metal Manufacturing331221 | 1-19 | ◐ LIKELY ACTIVE |
| CSCapital steel and wire, Hull Rd | Mason | MI | Primary Metal Manufacturing331221 | 20-99 | ◐ LIKELY ACTIVE |
| CCCarter Component Plant 537 | Mason | OH | Wood Product Manufacturing321214 | 20-99 | ◐ LIKELY ACTIVE |
| CWCasali Winery | Mason | MI | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CBCincinnati Branch | Mason | OH | Machinery Manufacturing333995 | 1-19 | ◐ LIKELY ACTIVE |
| CRCompass Rose Cellars, INC | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| CSComplete Services, INC | Mason | OH | Furniture and Related Product Manufacturing337110 | — | ◐ LIKELY ACTIVE |
| DCDart Container Fiber | Mason | MI | Paper Manufacturing322219 | 20-99 | ◐ LIKELY ACTIVE |
| DCDart Container Mason MTM | Mason | MI | Machinery Manufacturing333249 | 100-499 | ◐ LIKELY ACTIVE |
| DCDTWMP Contech Engineered Solutions LLC | Mason | MI | Fabricated Metal Product Manufacturing332322 | 1-19 | ◐ LIKELY ACTIVE |
| FCFANUC - Central | Mason | OH | Machinery Manufacturing333998 | 20-99 | ◐ LIKELY ACTIVE |
| FCFluid Connectors Mason | Mason | MI | Fabricated Metal Product Manufacturing332912 | 20-99 | ◐ LIKELY ACTIVE |
| FGFly Gap Roots | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FGFly Gap Winery & Dark Lounge | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| FLFowlers Loyal Valley Vineyards, LLC | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
Gamber-Johnson LLC - InfoCase | Mason | OH | Fabricated Metal Product Manufacturing332999 | 1-19 | ◐ LIKELY ACTIVE |
| GIGimbal Innovations INC | Mason | OH | Machinery Manufacturing333310 | — | ◐ LIKELY ACTIVE |
| GIGraphic Information Systems, INC. | Mason | OH | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |
| HIHoneywell Intelligrated Mason | Mason | OH | Machinery Manufacturing333922 | 500+ | ◐ LIKELY ACTIVE |
| JUJbs USA | Mason | OH | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| JHJ.W. Harris Co., Inc. - Mason | Mason | OH | Primary Metal Manufacturing331420 | 100-499 | ◐ LIKELY ACTIVE |
| LOLazy O Vineyard | Mason | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| MMason | Mason | OH | Fabricated Metal Product Manufacturing332439 | 20-99 | ◐ LIKELY ACTIVE |
| MMMason, Mi | Mason | MI | Paper Manufacturing322211 | 100-499 | ◐ LIKELY ACTIVE |
| MOMason office | Mason | OH | Machinery Manufacturing333993 | 20-99 | ◐ LIKELY ACTIVE |
| MOMason, OH | Mason | OH | Computer and Electronic Product Manufacturing334220 | 20-99 | ◐ LIKELY ACTIVE |
| MDMasters Drug Company, INC. | Mason | OH | Chemical Manufacturing325412 | — | ◐ LIKELY ACTIVE |
| MMMerindorf Meats Inc | Mason | MI | Food Manufacturing311612 | — | ◐ LIKELY ACTIVE |
| MVMio Vino, LLC | Mason | OH | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| MLMTXBeef, LLC | Mason | TX | Food Manufacturing311611 | — | ◐ LIKELY ACTIVE |
| MCMulti-Color Corporation - Mason F&B | Mason | OH | Printing and Related Support Activities323111 | 20-99 | ◐ LIKELY ACTIVE |