| Ziegler Industries IA | Construction | 0 | — | A |
| Ziegler Lumber Company ID | Retail Trade | 0 | — | B |
| Ziegler Lumber Company WA | Retail Trade | 0 | — | F |
| Ziegler, Inc WI | Wholesale Trade | 0 | — | F |
| Zielies Tree Service WI | Administrative & Waste Services | 0 | — | B |
| Ziemek Dental Laboratory, Inc. WA | Manufacturing | 0 | — | A |
| Zierden Company WI | Manufacturing | 0 | — | A |
| Ziering Medical, A Professional Corporation CA | Healthcare & Social Assistance | 1 | $90,000 | — |
| Zierke Built Manufacturing, Inc MN | Manufacturing | 0 | — | F |
| Ziese & Sons Excavating, Inc. IN | Construction | 0 | — | F |
| Ziff Davis Enterprise/Enterprise Media Group, Inc. NY | — | 0 | — | — |
| Ziff Davis, Inc (fka J2 Global, Inc) NY | Information & Media | 1 | $191,424 | — |
| Ziff Davis, LLC NY | Information & Media | 7 | $129,384 | — |
| Ziffity Solutions LLC TX | Professional & Technical Services | 2 | $180,000 | — |
| ZIFO TECHNOLOGIES, INC IL | Professional & Technical Services | 60 | $96,580 | — |
| Zigg Capital Management Company, LLC NY | Finance & Insurance | 1 | $225,000 | — |
| Zigg Holdings LLC dba Zigg Design UT | Manufacturing | 0 | — | A |
| Ziggi Fintech Inc TX | Information & Media | 1 | $180,000 | — |
| Zigler's Machine & Metal Works, LLC IL | Manufacturing | 0 | — | F |
| Ziglin Signs Inc MO | Manufacturing | 0 | — | A |
| Zignego Company WI | Construction | 0 | — | D |
| ZIGNEGO READY MIX, INC. WI | Manufacturing | 0 | — | B |
| ZignEx, Inc TX | Professional & Technical Services | 4 | $104,669 | — |
| Ziker Cleaners IN | Other Services | 0 | — | B |
| ZIKSATECH, LLC TX | Professional & Technical Services | 7 | $114,692 | — |
| Zilber Ltd. AZ | Construction | 0 | — | A |
| Zilber Ltd. CA | Construction | 0 | — | A |
| Zilber Ltd. FL | Real Estate | 0 | — | A |
| Zilber Ltd. HI | Construction | 0 | — | A |
| Zilber Ltd. TX | Construction | 0 | — | A |
| Zilber Ltd. WI | Real Estate | 0 | — | A |
| Zilka & Company PA | Wholesale Trade | 0 | — | D |
| Zilks Plus Resources LLC TX | Manufacturing | 0 | — | F |
| Zillion Group CA | Retail Trade | 2 | $135,200 | — |
| Zillion Technologies Inc. VA | Professional & Technical Services | 14 | $110,791 | — |
| Zillow Group CO | — | 0 | — | — |
| Zillow Group TX | — | 0 | — | — |
| Zillow Group - Supplemental CO | — | 0 | — | — |
| Zillow Group Update 11-18-21 CO | — | 0 | — | — |
| ZILLOW GROUP, Inc. AZ | — | 0 | — | — |
| Zillow Group, Inc. FL | — | 0 | — | — |
| Zillow, Inc. WA | Real Estate | 65 | $178,754 | A |
| Zilpin Tech LLC TX | Professional & Technical Services | 6 | $100,020 | — |
| ZIM Aircraft Cabin Solutions LLC NC | Manufacturing | 1 | $126,818 | — |
| Zim's Bagging WV | Manufacturing | 0 | — | F |
| Zima Corporation SC | Manufacturing | 0 | — | F |
| Zima Dynamic LLC MA | Transportation & Warehousing | 1 | $37,357 | — |
| Zima International, Inc. NY | Information & Media | 2 | $183,225 | — |
| Zima-Pack, LLC VA | Manufacturing | 1 | $69,701 | — |
| Zimbrick Inc WI | Retail Trade | 0 | — | B |