| OHO'neill Honey Company LLC | San Marcos | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PVParadis Vineyard and Winery, LLC | San Marcos | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| PSPerfect Soul Whiskey, LLC | San Marcos | CA | Beverage and Tobacco Product Manufacturing312140 | — | ◐ LIKELY ACTIVE |
Playcore Wisconsin, Inc., dba GFRC | San Marcos | TX | Miscellaneous Manufacturing339920 | 1-19 | ◐ LIKELY ACTIVE |
| RCRaging Cider & Mead Co. | San Marcos | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| RIRealStuff, Inc dba Yellowbird Food | San Marcos | TX | Food Manufacturing311941 | 20-99 | ◐ LIKELY ACTIVE |
| RCReitz, Charles | San Marcos | CA | Fabricated Metal Product Manufacturing332999 | — | ◐ LIKELY ACTIVE |
| RHRuby Heels Wine Shoppe | San Marcos | TX | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| SMSan Marcos | San Marcos | CA | Miscellaneous Manufacturing339113 | 1-19 | ◐ LIKELY ACTIVE |
| SPSATP Pavestone | San Marcos | TX | Nonmetallic Mineral Product Manufacturing327331 | 20-99 | ◐ LIKELY ACTIVE |
| TDTideborn Defense, LLC | San Marcos | TX | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TOTwin Oaks Valley Winery | San Marcos | CA | Beverage and Tobacco Product Manufacturing312130 | — | ◐ LIKELY ACTIVE |
| BIBaked in the Sun Dba House of Tudor | San Marcos | CA | Food Manufacturing311812 | — | ◇ UNVERIFIED |
| BHB & H Tool CO | San Marcos | CA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| 2V237 Via Vera Cruz | San Marcos | CA | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| 7W74 Weld, Inc. | San Marcos | CA | Fabricated Metal Product Manufacturing332710 | — | ◇ UNVERIFIED |
| ACAbba Collision Paint & Body Dba La Mirada Paint and Body Shop | San Marcos | CA | Transportation Equipment Manufacturing336360 | — | ◇ UNVERIFIED |
| ABAbel & Brothers Custom Iron Works | San Marcos | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| AIAeroweld INC | San Marcos | CA | Transportation Equipment Manufacturing336412 | — | ◇ UNVERIFIED |
| AGA & G Industries INC | San Marcos | CA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| ACAll City Storage | San Marcos | CA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| AIAltra Industrial Motion | San Marcos | TX | Machinery Manufacturing333613 | — | ◇ UNVERIFIED |
| ALAquaneering LLC | San Marcos | CA | Apparel Manufacturing315990 | — | ◇ UNVERIFIED |
| AAAudience AV, Inc. | San Marcos | CA | Nonmetallic Mineral Product Manufacturing327991 | — | ◇ UNVERIFIED |
| BBBestop Baja LLC Dba Baja Designs | San Marcos | CA | Transportation Equipment Manufacturing336321 | — | ◇ UNVERIFIED |
| BFBiodriven Fuel LP | San Marcos | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| BEBlackhawk Enterprises Company | San Marcos | TX | Fabricated Metal Product Manufacturing332312 | — | ◇ UNVERIFIED |
| BSBoral Stone Products LLC | San Marcos | CA | Nonmetallic Mineral Product Manufacturing327999 | — | ◇ UNVERIFIED |
| BVBravo Visual Solutions LLC | San Marcos | TX | Printing and Related Support Activities323111 | — | ◇ UNVERIFIED |
| BDBrew Dudes, LLC. | San Marcos | CA | Beverage and Tobacco Product Manufacturing312120 | — | ◇ UNVERIFIED |
| CACalifornia Air Compressor Company | San Marcos | CA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| CCCalifornia Commercial Asphalt LLC | San Marcos | CA | Petroleum and Coal Products Manufacturing324121 | — | ◇ UNVERIFIED |
| CSCalifornia Sheet Metal Works INC | San Marcos | CA | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| CPCapital Precast | San Marcos | TX | Nonmetallic Mineral Product Manufacturing327390 | — | ◇ UNVERIFIED |
| CMCart Mart INC | San Marcos | CA | Transportation Equipment Manufacturing336999 | — | ◇ UNVERIFIED |
| CSChristenson Surfboards, INC. | San Marcos | CA | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| CCCliniqa Corporation | San Marcos | CA | Chemical Manufacturing325413 | — | ◇ UNVERIFIED |
| CVCmjm Ventures, INC. | San Marcos | CA | Printing and Related Support Activities323113 | — | ◇ UNVERIFIED |
| CIConamore INC | San Marcos | CA | Food Manufacturing311821 | — | ◇ UNVERIFIED |
| CGCotechno Group, INC. | San Marcos | TX | Plastics and Rubber Products Manufacturing326199 | — | ◇ UNVERIFIED |
| DCDana CORP San Marcos Plant | San Marcos | TX | Miscellaneous Manufacturing339999 | — | ◇ UNVERIFIED |
| DMDavid Maldonado | San Marcos | CA | Fabricated Metal Product Manufacturing332323 | — | ◇ UNVERIFIED |
| DTDeupree Trucking Corporation | San Marcos | CA | Petroleum and Coal Products Manufacturing324191 | — | ◇ UNVERIFIED |
| DMDexter Marine Products LLC | San Marcos | CA | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| DCDiagraphics CORP | San Marcos | CA | Furniture and Related Product Manufacturing337110 | — | ◇ UNVERIFIED |
| DSDiscovery Sl LLC | San Marcos | CA | Transportation Equipment Manufacturing336350 | — | ◇ UNVERIFIED |
| DIDwyer Instruments, LLC (dba Fluid Components International) (tech Center) | San Marcos | CA | Computer and Electronic Product Manufacturing334513 | — | ◇ UNVERIFIED |
| ESEdith Sewing | San Marcos | CA | Apparel Manufacturing315212 | — | ◇ UNVERIFIED |
| ETElectro Tech Coatings INC | San Marcos | CA | Miscellaneous Manufacturing339910 | — | ◇ UNVERIFIED |
| EMEnstrom Mold & Engineering INC | San Marcos | CA | Plastics and Rubber Products Manufacturing326121 | — | ◇ UNVERIFIED |