Adeptus Health Inc NYSEADPT shares declined 66 percent to $9.15 after the company posted downbeat quarterly results and lowered its FY16 EBITDA outlook.
Cempra IncCEMP 57.1% shares declined 57 percent to $8.02 after the FDA raised liver safety issues in its review of the company's experimental drug to treat community acquired pneumonia. Baird downgraded Cempra from Outperform to Underperform.
DexCom, Inc. NASDAQDXCM shares fell 18.5 percent to $63.47. DexCom reported a Q3 loss of $18.8 million on revenue of $148.6 million.
Paycom Software Inc NYSEPAYC shares fell 16.7 percent to $43.32. Paycom reported Q3 non-GAAP earnings of $0.15 per share on revenue of $77.3 million.
Tableau Software Inc NYSEDATA shares dropped 12.5 percent to $43.32. Tableau Software posted weaker-than-expected quarterly results and announced a $200 million stock buyback plan.