Lehman Brothers Inc. ( LEE-mən) was an American global financial services firm founded in 1850. Before filing for bankruptcy in 2008, Lehman was the fourth-largest investment bank in the United States (behind Goldman Sachs, Morgan Stanley, and Merrill Lynch), with about 25,000 employees worldwide. It was doing business in investment banking, equity, fixed-income and derivatives sales and trading (especially U.S. Treasury securities), research, investment management, private equity, and private banking. Lehman was operational for 158 years from its founding in 1850 until 2008.
https://en.wikipedia.org/wiki/Lehman_Brothers