Jefferies Financial Group Inc., a financial services company, engages in investment banking and capital markets, asset management, and direct investing businesses in the Americas, Europe, and Asia. the company also offers equities research, sales, and trading services; equity finance services comprising financing, securities lending, and other prime brokerage services; and wealth management services to high net worth individuals, their families and businesses, private equity and venture funds, and small institutions.

In addition, it provides fixed income sales and trading services for investment grade corporate bonds, U.S. and European government and agency securities, municipal bonds, mortgage- and asset-backed securities, leveraged loans, consumer loans, securities, markets debt, interest rate, and credit derivative products, as well as foreign exchange trade execution and securitization capabilities, as well as manages, invests in, and provides services to a group of alternative asset management platforms in investment strategies and asset classes.

The company was formerly known as Leucadia National Corporation and changed its name to Jefferies Financial Group Inc. in May 2018. Jefferies Financial Group Inc. was founded in 1968 and is headquartered in New York, New York.