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Check out which companies are making headlines before the bell:

Burger King Worldwide–Burger King has finalized its deal to acquire Canada-based doughnut chain Tim Hortons. Warren Buffett's Berkshire Hathaway will make a $3 billion investment in the form of preferred shares, and sources tell CNBC's Andrew Ross Sorkin that Buffett's investment will actually not save in taxes. Those sources say the structure of the deal is more about getting it approved by Canadian regulators.

Best Buy–The electronics retailer earned 44 cents per share, excluding certain items, beating estimates by 13 cents. Revenue was slightly shy, however, and comparable store sales fell more than expected. Best Buy did benefit from cost reduction efforts, but CEO Hubert Joly said store traffic continues to decline.

DSW–The shoe retailer beat estimates by six cents with quarter profit of 38 cents per share, and saw revenue well above expectations as well.

Movado–The watch maker fell ten cents short of consensus with second quarter profit of 44 cents per share, with revenue also falling short. Movado does say it expects sales to accelerate in the second half of the year, and reaffirmed its full-year forecast.

Sanderson Farms–The poultry producer earned $3.30 per share for its third quarter, 52 cents shy of estimates, with revenue far short of consensus as well. Sanderson's profit did increase 12 percent from a year earlier, on higher sales and prices.

Goldman Sachs–MKM initiated coverage on Goldman with a "buy" rating, saying the firm's earnings quality is improving and that trading activity has likely bottomed.

Amazon.com–The online retailer finalized a deal to buy live-streaming gaming network Twitch for about $970 million. The deal is the largest in Amazon's history.

Microsoft–Microsoft is being targeted by China antitrust regulators, who are raising issues with the bundling of the company's internet browser and media player with its operating system.

Chevron–The 2nd largest U.S. oil company is seeking an investment of up to $1.5 billion to develop an oil project in Canada, according to a Reuters report.

Time Warner–Time Warner is reportedly preparing buyout offers for up to 600 staffers, or 4 percent of the workforce, at its Turner cable division.

Digital Ally–The company's stock is on watch again today after jumping as much as 80 percent Monday. The maker of wearable cameras is getting extra attention in the wake of the fatal police shooting in Ferguson Missouri, which is leading to more calls for police to wear cameras on the job.

Walt Disney–The entertainment giant filed for three patents related to the use of drones in air shows.

Dish Network–Dish has petitioned the FCC to deny Comcast's bid to buy Time Warner Cable. The petition said the deal could significantly damage competition in several areas.

TiVo–The digital recording company is introducing a new DVR for customers without cable or satellite TV service. The device would record both over the air broadcasts as well as streaming online networks.

By CNBC's Peter Schacknow

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