[MatthewDPX]

Founder of MarketBeat (website mentioned) here. We do have more than two years of data (more like 7), but profile pages get too large when we publish it all in one shot. We can make the full history available as a giant CSV file if there's a researcher that wants to do a similar analysis over a long period of time.

[youngprogrammer]

Hey Matthew, thanks for running your website! It was very helpful for obtaining the data I needed for my blogpost.

[MatthewDPX]

You're welcome. Email me if you want the full data set. matt [at] mattpaulson [dot] com.