Following is a list of the top 10 best stock performers of 2013—the 10 biotech, pharma, tools/tech, and services (CROs) company stocks that gained the most in value during 2013 (as of December 13). Companies are listed by name; their stock exchange and trading symbol; the closing price on December 13, 2013, and December 13, 2012; the percentage of change between the closing prices; and a brief explanation for the companies’ good fortune.
The top performers are up-and-coming companies, small- to mid-capitalization (“small cap” to “mid cap”) stocks that jumped in value as a result of some sort of good news—from marketing approvals, to encouraging clinical trials results, to rumors of an acquisition by a much larger company. One of the 10 (Gentium) will likely disappear from the next update of this GEN List, since it has entered into an agreement to be acquired by Jazz Pharmaceuticals for about $1 billion.
Not listed are companies that appeared to show even larger price gains, but only as a result of reverse stock splits, since the adjusted closing prices resulting from the splits showed much smaller year-to-year gains for investors.