IBM posted earnings that fell short of analysts' expectations, after seeing a "marked slowdown" in September.
Valeant Pharmaceuticals said it may raise its bid for Allergan after posting a better-than-expected quarterly profit.
Halliburton reported a better-than-expected profit, helped by buoyant shale drilling activity in North America.
Gannett on Monday reported third-quarter earnings of $118.5 million.
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