AAWW Atlas Air Worldwide Holdings

•    General Mills (NYSE:GIS) posted Q1 EPS of $0.64, above the Zacks Consensus Estimate of $0.63 per share. Revenues for the quarter rose 9% year-over-year to $3.85 billion

•    Share prices of Analogic Corp. (NASDAQ:ALOG) advanced 4.38% after the company reported fourth-quarter earnings that came in above market expectations

•    Pharma-company Orexigen Therapeutics Inc.'s (NASDAQ:OREX) shares sky rocketed 48.98% to close at $2.19 after the drug developer announced that it has entered into an agreement with regulators which will enable the company to renew development of its obesity drug

•    Share prices of coal producer Alpha Natural Resources Inc. (NYSE:ANR) declined 17.16% a share after the company lowered its shipments outlook for 2011

•    SunTrust Robinson Humphrey Inc. downgraded Atlas Air Worldwide Holdings Inc (NASDAQ:AAWW) from "Buy" rating to "Neutral" rating. Following the downgrade, share prices of the freight carrier for airlines fell 13.33% to close at $37.65

•    Investment banker Jefferies Group Inc.’s (NYSE:JEF) shares declined 7.89% after analysts at Goldman Sachs (NYSE:GS) trimmed estimates for third-quarter earnings

•    Pacific Biosciences of California (NASDAQ:PACB) announced its decision to reduce its total workforce by 28%. Following this development, the share prices of the company fell down 23.56%

•    Shares of Walter Energy, Inc. (NYSE:WLT) fell 11.67% after the coal company projected third-quarter income lower than the Street’s expectations