I'm a shareholder in Celgene - CELG.  Not trying to spam it, but it has done a great job with it's PR.  Has a lot to promote (just a PTSC does) and gets the word out in many venues.  Just the announcement today that they would provide guidance in a couple of weeks reversed a sell-off trend that the stock has been under generally over the last few weeks, and specifically today (was down over $4).

http://finance.yahoo.com/q?s=CELG

I know PTSC will have it's day where it can do this too, but just wanted to provide what I consider a good example.