Summarize Data Help

Ok so I have over 11 years (attached example just part of the data) of monthly returns and quintiles for companies. I've quintiled the companies out by month then I matched up the companies returns for those periods (starting in column AL). I'm trying to figure out a way to easily summarize this data. I want to see what the returns are of the companies over different time periods based on what quintile they are in. I thought maybe I could use multiple pivot tables based on the same data but am struggling to do that. Any help would be much appreciated!

Cheers

Sorry for the confusion. I guess what I want to be able to do is look across the different time periods to see how many companies are driving the performance in the different quintiles. So for instance in one period if say 65% of the companies in the 1st quintile had positive performance and an average return of say 12%, but the 5th quintile also had 65% of the companies in it report positive performance but a lower average performance say 5%, I'd want to quickly be able to see what companies were driving that higher performance in the 1st quintile. I hope that helps Thanks for your help!