Introduction
Lehman Brothers filed for Chapter 11 in September 2008 with roughly $639 billion in assets. No U.S. corporate filing has come close since.
But "largest" depends on what you measure: assets, liabilities, employees affected, or damage to the wider economy. Each yields a different list.
This article ranks the biggest U.S. corporate bankruptcy filings and explains what drove each collapse. It also covers who got paid and how the figures were verified.
Bank failures like Washington Mutual are handled separately, because regulators resolved them outside the standard Chapter 11 process.
Key Takeaways
- Fix the metric first: assets, liabilities, and economic impact produce different rankings.
- Lehman Brothers is the largest corporate filing by assets, at about $639 billion.
- WorldCom, General Motors, Enron, and CIT Group round out the commonly cited cases.
- Washington Mutual was a regulator-seized bank failure, not a conventional bankruptcy.
- Historical case data helps professionals spot distress signals and benchmark outcomes.
Overview of the Largest Bankruptcies in U.S. History
What counts as a large bankruptcy
A corporate bankruptcy is a court-supervised insolvency proceeding. Chapter 11 is generally used to reorganize a business, and the debtor typically stays in possession while the court considers a plan. Chapter 7 is a liquidation run by a trustee.
Bank seizures, government rescues, and out-of-court restructurings sit outside that category.
Common comparison measures:
- Assets reported at filing
- Liabilities and debt burden
- Employees, customers, and creditors affected
- Systemic or economic consequences
Why rankings vary
Sources disagree for good reasons. Lists differ on which entity filed (a parent holding company or its affiliates), whether figures are consolidated, and whether dollars are nominal or inflation-adjusted. Some include bank failures; others don't.
A Reuters 2008 factbox, built on filing figures and BankruptcyData.com, listed Lehman at $639 billion in assets and WorldCom at $103.914 billion. Those are nominal numbers, not a harmonized ranking.
BankruptcyData maintains historical U.S. bankruptcy records that researchers use to verify filing dates, case entities, court activity, stakeholders, and outcomes. The cases below focus on corporate filings at scale. Famous collapses that fall outside that category get a separate note.
Largest U.S. Corporate Bankruptcies
Each case below is anchored to the debtor that actually filed, the filing date, and the measurement date of every figure. Where a number comes from a quarterly report rather than a petition, it says so.
Lehman Brothers: 2008
Lehman Brothers Holdings Inc. filed Chapter 11 in the Southern District of New York at 1:45 a.m. on September 15, 2008. Its broker-dealer subsidiaries were not part of that filing.
The petition exhibit reported about $639 billion in assets and $613 billion in liabilities for the company and affiliates as of May 31, 2008. That's a group figure at that date, not a September 15 valuation.
What went wrong:
- Heavy exposure to subprime and Alt-A mortgages, commercial real estate, and leveraged loans
- Long-term assets funded by short-term repo borrowing
- Roughly $700 billion in assets on about $25 billion of capital, per the Examiner
- Repo 105 transactions that temporarily removed assets from the balance sheet and lowered reported leverage
Rescue failed over the September 12-14 weekend. The SEC's account says the government lacked legal authority to invest capital directly, and Lehman's assets weren't sufficient collateral for a loan big enough to stop the collapse.
The fallout was global. Lehman reported about 28,600 employees as of November 30, 2007, and Lehman Brothers International (Europe) entered administration the same day. Recoveries vary by creditor class, so no single estate-wide percentage applies.
Lehman is regarded as the largest corporate bankruptcy by assets. Its Chapter 11 filing was one event inside the broader 2008 crisis, not the crisis itself.
WorldCom: 2002
WorldCom Inc. and certain U.S. subsidiaries filed Chapter 11 on July 21, 2002, in the Southern District of New York. Its last 10-Q before filing, for March 31, 2002, showed $103.914 billion in assets and $43.890 billion in liabilities. Those are quarter-end numbers, not petition-date totals.
The cause was fraud. The SEC found WorldCom improperly moved about $3.8 billion of line-cost expenses into asset accounts, making a weakening telecom business look like it was still growing.
Consequences:
- CEO Bernard Ebbers was convicted in 2005 and sentenced to 25 years
- A court approved a $2.25 billion SEC civil penalty, satisfied through $500 million in cash and $250 million in stock
- WorldCom emerged as MCI on April 20, 2004
- A disclosure statement projected roughly 21% recovery for general unsecured creditors of one subsidiary, MCI WorldCom Network Services. That figure doesn't apply to all creditors.
The Sarbanes-Oxley Act followed on July 30, 2002, to improve the accuracy of corporate disclosures. It shouldn't be credited to WorldCom alone, or to Enron alone.
General Motors Corporation: 2009
General Motors Corporation filed Chapter 11 on June 1, 2009 (case 09-50026, Southern District of New York). The court filing reported consolidated global assets of about $82 billion and liabilities of about $172 billion as of March 31, 2009, at book value rather than appraisal value.
The debtor and today's GM are different entities. On July 10, 2009, a purchaser acquired substantially all assets in a Section 363 sale. The old company was renamed Motors Liquidation Company to wind down what remained. Use New GM figures only for New GM.
Key facts:
- The sale secured four core brands: Chevrolet, Cadillac, Buick, and GMC. Pontiac, Saturn, and HUMMER production later ceased.
- Treasury reports a $51.0 billion original investment and $39.7 billion recovered, with a full exit on December 9, 2013.
- The UAW retiree trust received a 17.5% common-stock interest, a $2.5 billion note, and $6.5 billion in preferred stock.
Treasury's figures show what was invested and recovered; they don't settle a net taxpayer-loss number, and this article doesn't claim one.
Enron: 2001
Enron Corporation and certain subsidiaries filed Chapter 11 on December 2, 2001, in the Southern District of New York. Its last pre-filing quarterly report showed $61.783 billion in total assets as of September 30, 2001. That isn't a petition-date value.
Enron hid debt through special-purpose entities, including the Chewco and LJM structures. A Senate subcommittee report found Enron had about $27 billion in unconsolidated affiliates by October 2000, with transactions that moved debt off the balance sheet.
Outcomes:
- Jeffrey Skilling was convicted on 19 of 28 counts in 2006
- The Supreme Court reversed Arthur Andersen's conviction because the jury instructions didn't require a culpable mental state
- Senate testimony in 2002 suggested about 15,000 employees lost an estimated $1.3 billion in 401(k) savings, with more than half of plan assets reportedly in Enron stock. Those are testimony-based estimates, not an audited loss.
CIT Group: 2009
CIT Group Inc. and CIT Group Funding Company of Delaware LLC filed a prepackaged Chapter 11 on November 1, 2009. Its 10-Q for September 30, 2009, the last quarter-end before filing, reported $69.189 billion in assets and $64.068 billion in liabilities.
CIT financed small and middle-market businesses, so when 2009 liquidity pressure hit, the credit it provided dried up for many of its borrowers. Its plan cut debt by about $10.5 billion and pushed maturities out three years. The court confirmed it December 8, and CIT emerged December 10.
Treasury had invested $2.33 billion in preferred stock in December 2008. Its June 2010 report records zero recovery and a $2.33 billion loss.
CIT earns its place on a filing-asset list even though its public profile and systemic reach were smaller than Lehman's or GM's.
Important Bank Failures Often Confused With Corporate Bankruptcies
Washington Mutual
On September 25, 2008, regulators closed Washington Mutual Bank and appointed the FDIC as receiver. FDIC records show $307 billion in assets and $188 billion in deposits at failure. Substantially all assets and liabilities went to JPMorgan Chase under a purchase-and-assumption agreement.
The bank never went through Chapter 11. Its holding company, WMI, filed separately on September 26, 2008, in Delaware. That's the corporate case. The bank's receivership is a regulatory resolution, not a Chapter 11 filing.
Silicon Valley Bank
Silicon Valley Bank held about $209 billion in assets at December 31, 2022. The FDIC took it into receivership on March 10, 2023, and transferred deposits under the systemic risk exception. The Federal Reserve's review identified failures in interest-rate and liquidity-risk management.
Its parent, SVB Financial Group, filed Chapter 11 on March 17, 2023.
Why they're still tracked
Researchers track these failures alongside bankruptcies because they share several features:
- Distressed institutions under severe pressure
- Creditor or depositor exposure at scale
- Government action and asset transfers
- Large restructuring outcomes
They still do not belong in a Chapter 11 ranking.
How We Chose the Largest Bankruptcies
Process
- Identify notable U.S. cases.
- Verify the legal debtor and court filing.
- Pull assets and liabilities from primary records: petitions, SEC filings, examiner reports, FDIC records, and BankruptcyData case records.
- Record the date and measurement basis for every figure.
We also looked past size to cause of distress, restructuring or liquidation path, creditor consequences, regulatory impact, and whether the company survived.
Handling competing rankings
When rankings conflict, we state the metric clearly and keep assets and liabilities separate. We do not compare consolidated groups, subsidiaries, and regulatory resolutions without a caveat.
Common mistakes
- Using successor-company figures, such as New GM for Old GM
- Treating a bank failure as a Chapter 11 case
- Mixing nominal and inflation-adjusted values
- Citing market capitalization instead of filing assets
- Calling the latest 10-Q the petition-date balance sheet
- Repeating a ranking without a publication date
For inflation adjustments, we name the CPI series and periods. The BLS CPI-U all-items series is a reproducible choice.
Historical case data supports precedent research, risk monitoring, restructuring analysis, and early-warning work for law firms, investors, lenders, advisers, and credit teams.
Conclusion
These collapses had different roots: leverage at Lehman, accounting fraud at WorldCom and Enron, industry disruption and legacy costs at GM, and a funding squeeze at CIT. The "largest" label shifts with the measure. A credible ranking names the debtor, filing type, date, source, and comparison basis.
Professionals evaluating a company or restructuring should pair historical case data with current court activity, stakeholder intelligence, and distress signals. BankruptcyData offers 600k+ records spanning 45+ years of U.S. bankruptcy activity, plus data delivery and API-enabled workflows for historical outcomes and live case research.
Frequently Asked Questions
What was the biggest company collapse in history?
It depends on the measure: assets, liabilities, market value, or economic impact. In the U.S., Lehman Brothers is the largest corporate bankruptcy by assets. Washington Mutual was the largest bank failure, but regulators resolved it.
What caused Lehman Brothers to collapse?
Heavy mortgage-related exposure, high leverage, reliance on short-term repo funding, and fading market confidence. No viable rescue or financing arrangement emerged over the September 2008 weekend.
How big was Lehman Brothers before it failed?
Its petition exhibit reported about $639 billion in assets and $613 billion in liabilities for Lehman and affiliates as of May 31, 2008. It reported roughly 28,600 employees as of November 30, 2007.
Is Chapter 7 worse than Chapter 11?
Neither is inherently worse. Chapter 7 is a trustee-run liquidation, while Chapter 11 generally lets a business reorganize. The right path depends on the debtor's assets, operations, financing, and restructuring prospects.
Which company had the largest bankruptcy in U.S. history?
Lehman Brothers, measured by assets at filing. Other lists can differ if they include bank failures, use different debtor entities, rank by liabilities, or adjust for inflation.
What is the difference between a bankruptcy and a bank failure?
A corporate bankruptcy is typically a court-supervised proceeding. A bank failure usually involves regulatory closure, FDIC receivership, deposit protection, or a forced sale. Washington Mutual is the standard example.
