Benzinga's Top Pre-Market Gainers

Union Drilling

soared 7.50% to $6.59 in the pre-market trading. Sidewinder Drilling announced its plans to acquire Union Drilling for $6.50 per share. The KEYW Holding

surged 2.44% to $12.60 in the pre-market session. KEYW Holding pricing an underwritten public offering of 7,400,000 shares of its common stock at a price of $11.75 per share. Safeway

added 1.94% to $16.25 in the pre-market session. Analysts at BMO Capital upgraded Safeway from “market perform” to “outperform.” Approach Resources

moved up 1.51% to $29.60 in the pre-market session. Analysts at JP Morgan upgraded Approach Resources from “neutral” to “overweight.”