0000913760 2020-12-16 2020-12-16 0000913760 false 8-K 2020-12-16 StoneX Group Inc. DE 000-23554 59-2921318 155 East 44th Street Suite 900 New York NY 10017 (212) 485-3500 false false false false Common Stock, $0.01 par value SNEX NASDAQ false