Check out which companies are making headlines before the bell:
Costco—The warehouse retailer topped estimates by 3 cents with fiscal first quarter profit of $1.12 per share. Revenue was essentially in line. Costco also reported a better-than-expected 7 percent rise in same-store sales excluding fuel.
Toll Brothers—The home builder fell 2 cents short of estimates with quarterly profit of 71 cents per share, though revenue was above estimates. The company said it sees positive momentum going into the new fiscal year after a period of flat sales.
Burger King Worldwide—RBC upgraded the restaurant chain's stock to "outperform" from "sector perform," on optimism about the benefits of Burger King's combination with the Tim Hortons doughnut and coffee chain.
American Airlines Group and United Continental—Barclays upgraded both stocks to "overweight" from "equal-weight," with airlines in general expected to see a $10 billion decline in fuel costs in 2015.
Krispy Kreme—The doughnut chain fell a penny short of estimates with adjusted quarterly profit of 18 cents per share, with revenue shy of consensus as well. Those shortfalls came amid limited-time offers and promotions that helped increase Krispy Kreme's customer traffic.
—Broadcom raised its fourth quarter revenue guidance, increased its dividend by 17 percent, and announced a $1 billion stock buyback. The chipmaker's quarterly dividend goes to 14 cents per share from 12 cents.
Yum Brands—The parent of KFC, Pizza Hut and Taco Bell cut its profit forecast for a second time, as sales in the key China market staged a slower-than- expected recovery. Yum now sees full-year profit up in the mid-single digits, compared with analyst estimates of a 9-percent increase.
BP—The oil and gas multinational will spend $1 billion for a company-wide restructuring and said it will review its capital spending plans for next year in light of the recent drop in oil prices.
Belden—The networking products maker is buying cybersecurity firm Tripwire for $710 million, a deal that Belden said would add 65 cents per share to operating earnings in 2015.
Korn/Ferry International—The executive search firm reported quarterly profit of 51 cents per share, 6 cents above estimates, with revenue also above consensus. It also said it would begin paying a quarterly dividend, after seeing fee revenue grow across all its segments.
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