| 505 Go INC. CA | Information & Media | 1 | $92,898 | - |
| 505 Logistics NM | Transportation & Warehousing | 0 | - | F |
| 505 Southwestern NM | - | 0 | - | - |
| 5061 Logistics TX | Transportation & Warehousing | 0 | - | F |
| 507 (Pub)lic House MN | - | 0 | - | - |
| 513 Hotel Operating CO | - | 0 | - | - |
| 51st ST. & 8th Ave Corp DBA Loews Coronado Bay Resort CA | - | 0 | - | - |
| 51st Street & 8th Avenue Corp - Loews Coronado Bay Resort CA | - | 0 | - | - |
| 5271 Main Street Operating Company, LLC NY | Healthcare & Social Assistance | 0 | - | F |
| 5280 Solutions OK | Transportation & Warehousing | 0 | - | F |
| 530 Hospitality, LLC dba The Skylark NY | - | 0 | - | - |
| 535 5th LLC CA | - | 0 | - | - |
| 5399 Prospect Rd. LLC, DBA Super Duper CA | - | 0 | - | - |
| 545 West 30th Street F & B Management, LLC dba Cedric's at the Shed NY | - | 0 | - | - |
| 54D Online, LLC FL | Arts & Entertainment | 3 | $108,000 | - |
| 55 Washington Street LLC NY | Construction | 2 | $165,000 | - |
| 55th Street Hospitality Holdings, LLC dba The Ricky Fishbowl and PHD Terrace NY | - | 0 | - | - |
| 55th Street Hospitality Holdings, LLC dba The Ricky Fishbowl and PHD Terrace (Dream Midtown F&B) (NYC) NY | - | 0 | - | - |
| 55th Street Restaurant Operating LLC dba DIG NY | - | 0 | - | - |
| 55th Street Restaurant, LLC FL | Accommodation & Food Services | 0 | - | F |
| 568 Amsterdam, LLC dba Sirenetta NY | - | 0 | - | - |
| 56th & Park F&B Management LLC dba The Restaurant NY | - | 0 | - | - |
| 5775 Maelou Drive Operating Company, LLC DBA Elderwood at Hamburg NY | Healthcare & Social Assistance | 0 | - | - |
| 57th Restaurant Associates, LLC dba Rue57 Brasserie NY | - | 0 | - | - |
| 57th Street, LLC dba Kingside & The Roof NY | - | 0 | - | - |
| 58 Bakery, Inc MA | Accommodation & Food Services | 1 | $208,000 | - |
| 5812 Investment Group LLC MN | Real Estate | 0 | - | F |
| 59 WEST HUBBARD, INC. Ramen-San, Dance Studio and Il Porcellino IL | - | 0 | - | - |
| 5905 AHK, LLC dba Keyes Chevrolet CA | - | 0 | - | - |
| 5AM Venture Management, LLC CA | Finance & Insurance | 1 | $350,000 | - |
| 5B Puerto Rico LLC PR | - | 1 | $150,000 | - |
| 5B Solutions LLC NY | - | 1 | $134,992 | - |
| 5b USA LLC DE | Wholesale Trade | 1 | $130,000 | - |
| 5dlight INC. CA | Wholesale Trade | 1 | $42,000 | - |
| 5G Masonry MO | Construction | 0 | - | F |
| 5L3R Logistics LLC NC | Transportation & Warehousing | 0 | - | F |
| 5th & Market Group LLC CA | - | 0 | - | - |
| 5th INDIA BAZAAR LLC TX | - | 2 | $75,317 | - |
| 5x Media LLC CA | Arts & Entertainment | 1 | $269,984 | - |
| 5x5 Technologies, Inc. FL | Professional & Technical Services | 1 | $110,000 | - |
| 605 Cleaning Service Company II LP NY | - | 0 | - | - |
| 605 Third Avenue Fee LLC NY | - | 0 | - | - |
| 605 Vhs Children S Hosp. Of Michigan INC. MI | Healthcare & Social Assistance | 0 | - | F |
| 605, LLC NY | Professional & Technical Services | 2 | $116,806 | - |
| 61 Degrees North LLC ID | Transportation & Warehousing | 0 | - | D |
| 61 N Raymond, Inc. CA | - | 0 | - | - |
| 610 Smithfield Road RI | Healthcare & Social Assistance | 0 | - | F |
| 610 Vhs Detroit Receiving Hosp. INC MI | Healthcare & Social Assistance | 0 | - | F |
| 61st Street Service Corporation NY | Administrative & Waste Services | 0 | - | B |
| 620 Vhs Harper University Hosp. INC. MI | Healthcare & Social Assistance | 0 | - | F |