 NEW YORK--BUSINESS WIRE--Jefferies Financial Group Inc. NYSE: JEF today announced it will release its third-quarter earnings report on Thursday, September 30, 2021 after market close. About Jefferies Jefferies Financial Group Inc. is a diversified financial services company engaged in investment banking and capital markets, asset management and direct investing. Jefferies Group LLC, our wholly owned subsidiary, is the largest independent, global, full-service investment banking firm headqua 