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Check out which companies are making headlines before the bell:

Amazon.com — The Wall Street Journal is reporting that Amazon is considering at least three formats for brick-and-mortar food stores. That news follows Amazon's unveiling of its "Amazon GO" store format, featuring no cash registers, no lines, and a "grab-and-go" method of shopping.

AstraZeneca — The drug maker reported upbeat results for its Tagrisso lung cancer drug in a trial, saying it improved progression-free survival by nearly six months.

AutoZone — The auto parts retailer earned $9.36 per share for its latest quarter, five cents above estimates, with revenue essentially in line as same-store sales rose 1.6 percent. AutoZone also saw improvement in profit margins from a year ago.

Ford Motor — Ford is raising $2.8 billion in new long-term financing, its first foray into the debt market in nearly four years. The company plans to use the proceeds to fund investment in new automotive technologies.

McDonald's — The company plans to keep a minority stake in its China and Hong Kong stores after it sells them, according to a Reuters report. The restaurant chain seeks to raise up to $2 billion in the transaction, and is said to have picked a consortium of private equity firm Carlyle Group and China state-owned conglomerate Citic to buy the stores.

Apple — Apple CEO Tim Cook told Reuters that Apple Watch sales to consumers set a record during the first week of holiday sales.

Toll Brothers — Toll reported adjusted quarterly profit of $1.15 per share, 16 cents above estimates. Revenue also beat forecasts, with the homebuilder's results improved by higher sales and average selling prices.

Aetna — The health insurer reportedly plans to ask for a trial to save its proposed deal to buy Humana if its current court case fails to turn back a Justice Department injunction. That's according to the New York Post, which said the company feels that the Justice Department in the Trump administration will be friendlier to business and might be willing to settle.

Sanofi — The drug maker is considering a bid for Swiss biotech firm Actelion, according to Bloomberg. Johnson & Johnson has been trying to buy Actelion and had reportedly raised its latest bid to more than $250 per share.

Skechers — Wells Fargo initiated coverage on the footwear maker with an "outperform" rating, saying the stock has a compelling valuation after a 50 percent tumble and that the Uggs maker has multiple catalysts for re-acceleration in 2017.

Nike — Cowen downgraded the athletic footwear and apparel maker to "market perform" from "outperform," saying Nike's market share losses to Adidas and Under Armour could accelerate.

Netflix — Evercore upgraded the video streaming service to "hold" from "sell," saying the competition it feared when it instituted the downgrade has not gained much traction.

GoDaddy — The internet domain name company struck a deal to buy internet services company Host Europe for $641 million, plus $1.15 billion in assumed debt. It's GoDaddy's largest-ever acquisition.

Pandora — Oppenheimer upgraded the online radio service to "outperform" from "perform," saying it sees reports of a buyout by SiriusXM as a legitimate possibility with a takeout value of up to $21 per share.

Select Comfort — Wedbush downgraded the mattress retailer to "neutral" from "outperform," saying the company would have difficulty meeting near-term expectations due to "intense" promotional activity.

Roper Technologies — The designer of engineered products and software is buying privately held enterprise software maker Deltek for $2.8 billion in cash.