The Top 5 Medical Device Companies of 2015

2015 may go down as a comeback year for the cardiovascular device sector. It wasn't long ago that many professionals in the industry assumed the niche's glory days were over. But this year, many of the most successful device companies have been expanding their cardiovascular businesses.  

It's not surprising then that four of the top-performing major medical device firms had their growth fueled--at least partly--by their cardiovascular business.  

In our roundup, we sorted through the 40 biggest medical device companies and charted the improvement of their stock from the beginning of the year to December 16.