| Studio on Fire MN | Manufacturing | 0 | — | A |
| Studio Pariah LLC CA | Professional & Technical Services | 1 | $120,000 | — |
| Studio PCH, Inc. CA | Professional & Technical Services | 1 | $70,000 | — |
| Studio Plus Architects Inc. FL | Professional & Technical Services | 4 | $91,040 | — |
| Studio Roda Inc FL | Professional & Technical Services | 2 | $70,058 | — |
| Studio RTA dba Sauder CA | Wholesale Trade | 0 | — | F |
| Studio SFW Design Architecture DPC NY | Professional & Technical Services | 1 | $110,490 | — |
| Studio Shed CO | Construction | 0 | — | A |
| STUDIO V Architecture, PLLC NY | Professional & Technical Services | 1 | $110,490 | — |
| Studio Whynought, LLC NY | Professional & Technical Services | 1 | $91,520 | — |
| STUDIO ZEWDE LLC NY | Professional & Technical Services | 1 | $95,000 | — |
| StudioFauve Inc. NY | Professional & Technical Services | 1 | $75,000 | — |
| StudioMB, PLLC DC | Professional & Technical Services | 1 | $75,500 | — |
| STUDIOS Architecture DC | Professional & Technical Services | 4 | $80,000 | — |
| STUDIOS GO, INC. NY | Professional & Technical Services | 1 | $46,696 | — |
| Studs, Inc. NY | Retail Trade | 2 | $153,000 | — |
| Stueken SC | Manufacturing | 0 | — | C |
| Stueve Construction LLC IA | Construction | 0 | — | F |
| Stuff Etc IA | Retail Trade | 0 | — | A |
| Stuffed Puffs PA | Manufacturing | 0 | — | B |
| Stukent, Inc. ID | Educational Services | 1 | $134,000 | — |
| Stull Woodworks Inc OH | Manufacturing | 0 | — | F |
| Stuller, Inc. LA | Manufacturing | 0 | — | A |
| STULZ Air Technology Systems, Inc. MD | Manufacturing | 0 | — | F |
| STULZ Air Technology Systems, Inc. TN | Manufacturing | 0 | — | F |
| Stumbaugh & Associates, Inc. CA | Construction | 0 | — | A |
| Stumpf Flats On Main VA | Real Estate | 0 | — | A |
| Stumptown Coffee Roasters NY | Manufacturing | 0 | — | F |
| Stumptown Coffee Roasters OR | Manufacturing | 0 | — | C |
| Stumptown Coffee Roasters - Cafe' Belmont OR | Accommodation & Food Services | 0 | — | F |
| Stumpy's Tree Service MA | Administrative & Waste Services | 0 | — | A |
| Stupp Bros., Inc KY | Manufacturing | 0 | — | C |
| Stupp Bros., Inc. MO | Manufacturing | 0 | — | A |
| Stupp Coatings, LLC LA | Manufacturing | 0 | — | C |
| Stupp Corp LA | — | 0 | — | — |
| Sturdi Iron Inc. IL | Manufacturing | 0 | — | A |
| Sturdy Corporation NC | Manufacturing | 0 | — | A |
| Sturdy Memorial Hospital MA | Healthcare & Social Assistance | 0 | — | F |
| STURGEON ELECTRIC CALIFORNIA, LLC CA | Construction | 0 | — | A |
| Sturgeon Electric Company, Inc. C&I CO | Construction | 0 | — | A |
| Sturgeon Electric Company, Inc. T&D CO | Construction | 0 | — | A |
| Sturgis Molded Products MI | Manufacturing | 0 | — | F |
| Sturla Inc. dba Medallion CA | Wholesale Trade | 0 | — | F |
| Sturley Investments, Inc KY | Transportation & Warehousing | 0 | — | B |
| Sturm Foods Inc. WI | Manufacturing | 0 | — | A |
| Sturm Heating & Air Conditioning, LLC WA | Construction | 0 | — | F |
| Sturm Ruger & Co. Inc. NC | Manufacturing | 0 | — | C |
| Sturm Ruger and Company, Inc. AZ | Manufacturing | 0 | — | F |
| Sturm, Ruger & Co. NH | Manufacturing | 0 | — | F |
| Sturm, Ruger & Co., Inc. AZ | Manufacturing | 0 | — | D |
