Safeway - Shares of the grocery store operator spiked after Reuters reported Safeway was in advanced discussions with Cerberus Capital Management over a leveraged buyout agreement.
Valmont Industries - Shares dropped after the fabricated metals producer posted weaker-than-expected fourth-quarter earnings and guided first quarter and 2014 earnings below estimates.
Isis Pharmaceuticals - Shares rose after the company reported positive data for its experimental treatment for spinal muscular atrophy in children.
3M - Shares edged higher after the diversified technology company agreed to acquire Treo Solutions, a provider of data analytics and business intelligence to healthcare payers and providers, for an undisclosed amount.
Dish Network - The satellite TV company rose after reporting a 38 percent rise in fourth quarter profit.
Wal-Mart Stores - Shares of the discount retailer fell after Stifel Nicolaus downgraded the stock to hold from buy.
Starwood Hotels & Resort Worldwide - The operator of hotels and resorts rose after it said it would pay a special dividend of 65 cents a share for the next four quarters.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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