To Catipillar
Sanford Securites provides a Todays trades area, that is accessable throughout the day and at the end of the day.
Beside each trade is a SSN number, I use this to see if it's the same buyer or seller all the time, you can spot accumulation or dumping easily.
16:10 no. 374,494 price 29.5 amount 9,400 Same buyer
16:10 no. 374,493 price 29.5 amount 25,000 Same buyer
15:49 no. 354,496 29 17,500 different buyer
15:47 no. 350,715 29 5,698 different buyer
hope this helps