Benzinga’s Top Pre-Market Gainers (ACI, MIR, NLST, GSIT)

Arch Coal, Inc. (NYSE: ACI) rose 2.41% to $25.90 in the pre-market session. Arch Coal was upgraded today by Citigroup from Hold to Buy. The 52-week trading range for ACI is $12.52 - $28.34. In the last six months, Arch Coal has gained over 8%.

Mirant Corporation (NYSE: MIR) climbed 15.94% to $12.44 in the pre-market session. Levi & Korsinsky announced that it is investigating the Board of Directors of Mirant Corporation for possible breaches of fiduciary duty and other violations of state law in connection with their attempt to sell the Company to RRI Energy, Inc. In the previous trading session, MIR closed at $10.73. MIR has declined over 18% in the last year.

Netlist, Inc. (NASDAQ: NLST) jumped 11.01% to $3.73 in the pre-market session. Netlist announced today qualification of HyperCloud™ memory on Super Micro Computer, Inc. (Supermicro) (Nasdaq: SMCI) high-density servers. The 52-week trading range for NLST is $0.18 - $7.98. Netlist closed at $3.36 in the last trading session.

GSI Technology, Inc. (NASDAQ: GSIT) moved up 11.81% to $5.48 in the pre-market session. GSI Technology, Inc. announced that for fourth quarter of 2010, it expects revenue to be in the range of $20.6 million - $21.2 million. According to Reuters Estimates, analysts are expecting GSIT to report revenues of $18.9 million for the fourth quarter of 2010. The 52-week trading range for GSIT is $2.40 - $6.00. GSI Technology closed at $4.91 in the previous trading session.