Benzinga's Top Pre-Market Losers

Illumina

shares dropped 8.31% to $45.32 in pre-market trading. Illumina's trailing-twelve-month ROA is 6.56%. Diamond Foods

shares fell 6.48% to $14.15 in the pre-market trading. Analysts at Jefferies downgraded Diamond Foods from “hold” to “underperform.” Aruba Networks

dipped 4.41% to $18 in the pre-market session. Aruba Networks shares have dropped 5.94% over the past 52 weeks, while the S&P 500 index has gained 13.99% in the same period. Shire plc

dipped 0.46% to $82.0929 in the pre-market session. Shire has a dividend yield of 0.20%.