Sources say Castle Securities' Q2 trading revenue reached $7.3 bln, a record and
more than triple year-earlier; net profit jumped over 250% to $3.3 bln. Rival
HRT posted Q2 trading revenue of $11.4 bln, over four times year-earlier. Jane
Street's net trading revenue exceeded $40 bln year-to-date through mid-August,
surpassing its 2025 full-year record of $39.6 bln. Jane Street reportedly lost
about $15 bln in July; Castle was profitable in July and expects to stay
profitable in August.