Lehman Brothers Holdings Inc. ( , former NYSE ticker symbol LEH) ( ) was a global financial-services firm that, until declaring bankruptcy in 2008, did business in investment banking, equity and fixed-income sales, research and trading, investment management, private equity, and private banking. It was a primary dealer in the U.S. Treasury securities market. Its primary subsidiaries included Lehman Brothers Inc., Neuberger Berman Inc., Aurora Loan Services, Inc., SIB Mortgage Corporation, Lehman Brothers Bank, FSB, Eagle Energy Partners, and the Crossroads Group. The firm's worldwide headquarters were in New York City, with regional headquarters in London and Tokyo, as well as offices located throughout the world.

On September 15, 2008, the firm filed for Chapter 11 bankruptcy protection. The filing marked the largest bankruptcy in U.S. history. The following day, the British bank Barclays announced its agreement to purchase, subject to regulatory approval, Lehman's North American investment-banking and trading divisions along with its New York headquarters building. On September 20, 2008, a revised version of that agreement was approved by Judge James Peck.

On September 22, 2008, Nomura Holdings announced that it had agreed to acquire Lehman Brothers' franchise in the Asia Pacific region, including Japan, Hong Kong and Australia. The following day, Nomura announced its intention to acquire Lehman Brothers' investment banking and equities businesses in Europe and the Middle East. The deal became effective on Monday, 13 October. In 2007, non-U.S. subsidiaries of Lehman Brothers were responsible for over 50% of global revenue produced.

Lehman Brothers' Investment Management business, including Neuberger Berman, was sold to its management on December 3, 2008. Creditors of Lehman Brothers Holdings Inc. retain a 49% common equity interest in the firm, now known as Neuberger Investment Management.http://www.nytimes.com/2008/12/04/business/04lehman.html Managers Win Auction for a Part of Lehman

Under the Lehman family (1850–1969)

In 1844, 23-year-old Henry Lehman, Geisst, Charles R. The Last Partnerships. McGraw-Hill, 1997, page 49 the son of a cattle merchant, emigrated to the United States from Rimpar, Bavaria. Bernhard, William, L., Birge, June Rossbach Bingham, Loeb, John L., Jr.. Lots of Lehmans - The Family of Mayer Lehman of Lehman Brothers, Remembered by His Descendants. Center For Jewish History, 2007, page 1 He settled in Montgomery, Alabama, where he opened a dry-goods store, "H. Lehman". Wechsberg, Joseph. The Merchant Bankers. Pocket Books, 1966, page 233 In 1847, following the arrival of his brother Emanuel Lehman, the firm became "H. Lehman and Bro." Bernhard, William, L., Birge, June Rossbach Bingham, Loeb, John L., Jr.. Lots of Lehmans - The Family of Mayer Lehman of Lehman Brothers, Remembered by His Descendants. Center For Jewish History, 2007, page 5 With the arrival of their youngest brother, Mayer Lehman, in 1850, the firm changed its name again and "Lehman Brothers" was founded. Birmingham, Stephen. Our Crowd- The Great Jewish Family's of New York. Harper and Row, 1967, page 47