0000913760 2021-10-01 2021-10-01 0000913760 false 8-K 2021-10-01 StoneX Group Inc. DE 000-23554 59-2921318 230 Park Ave 10th Floor New York NY 10169 (212) 485-3500 false false false false Common Stock, $0.01 par value SNEX NASDAQ false