Chapter 11:chapter of the United States Bankruptcy Code, which permits reorganization under the bankruptcy laws of the United States. Chapter 11 bankruptcy is available to any business, whether organized as a corporation or sole proprietorship, or individuals with unsecured debt of at least $336,900.00 or secured debt of at least $1,010,650.00, although it is most prominently used by corporate entities.
Largest corporate bankruptcies by far:| Company | Bankruptcy Date | Total Assets Pre-Bankruptcy | Filing Court District |
| Lehman Brothers Holdings, Inc. | 9/15/2008 | $639,000,000,000 (approximate) | NY-S |
| Worldcom, Inc. | 7/21/2002 | $103,914,000,000 | NY-S |
| Enron Corp.* | 12/2/2001 | $63,392,000,000 | NY-S |
| Conseco, Inc. | 12/18/2002 | $61,392,000,000 | IL-N |
| Texaco, Inc. | 4/12/1987 | $35,892,000,000 | NY-S |
| Financial Corp. of America | 9/9/1988 | $33,864,000,000 | CA-C |
| Refco Inc. | 10/17/2005 | $33,333,172,000 | NY-S |
| Global Crossing Ltd. | 1/28/2002 | $30,185,000,000 | NY-S |
| Pacific Gas and Electric Co. | 4/6/2001 | $29,770,000,000 | CA-N |
| UAL Corp. | 12/9/2002 | $25,197,000,000 | IL-N |
| Delta Air Lines, Inc. | 9/14/2005 | $21,801,000,000 | NY-S |
| Adelphia Communications | 6/25/2002 | $21,499,000,000 | NY-S |
| MCorp | 3/31/1989 | $20,228,000,000 | TX-S |
| Mirant Corporation | 7/14/2003 | $19,415,000,000 | TX-N |
| Delphi Corporation | 10/8/2005 | $16,593,000,000 | NY-S |