I was trying to find a way to track the institutional ownership change every quarter. I can do this by check the 13F documents on sec. This is a very painful process to go for each institution fillings and check if they change anything by comparing the 13F document with the previous one. if a new institution added a new stocks to its positions , this will be hard for me to find. I used Nasdaq to check the ownership but it is not always up to date ! I don't know if the SEC website offer a report for the change in the position for each institution or not. I tried to search but couldn't find anything useful. I am asking if someone know how to get such reports when it happen ? is there any website that do such kind of job ?