Benzinga's Top Pre-Market Losers

Diamond Foods (NASDAQ: DMND) dipped 6.79% to $21.95 on Q4 results.

Universal Display (NASDAQ: OLED) dipped 6.37% to $29.99 in the pre-market session after Canaccord Genuity downgraded the stock from Hold to Sell.

Aixtron SE (NASDAQ: AIXG) shares dropped 4.78% to $16.15 in pre-market trading after Canaccord Genuity downgraded the stock from Hold to Sell.

Arena Pharmaceuticals (NASDAQ: ARNA) shares fell 2.66% to $5.13 in the pre-market trading. Arena's PEG ratio is -1.51.