I can only go back through the last 7 days per restrictions to my terminal:
KCG 2.775 M Credit Suisse 1.066 M Jones Trading 985k (almost all since the last financing) BNY 758k UBS 630k (steadily declining) Northland Securities 365k Merrill 342k Citi 283k JP 243k Winterflood 75k others at small qty