If you read my original post on the Impact on Company Stock following Data Breaches, you’ll know that I’ve effectively debunked the myth that breaches materially impact stock price. I’ve continued to update this post with new data every month or so as time permitted. Recently though it seems to have gained a lot of notice, so I’ve added some new data points to provide more insight into what I’ve been tracking.

(Data As of Feb 25, 2015)
Added:

 

As time permits (or if you have a request), I’d be happy to piece other stock breach data together and add to this, just message me on twitter (@SeanAMason).