The IPO class of 2013 is up a median of 26% based on price performance since each offering, and up 11% vs. the BioCentury 100 index. However, the range is wide, with the best performing company up 202% on a BC100-adjusted basis and the worst performer down 71%. Outperformers outnumbered underperformers 20 to 13. List sorted by top performance vs. the sector index. (A) BC100 performance from the company's IPO date to Aug. 9; (B) IPO price change minus the BC100 change