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Check out which companies are making headlines before the bell on Wednesday:

Humana – The health insurer earned $2.31 per share for the third quarter, above estimates of $2.15. The company also said it expected a 2014 earnings decline, in part because of expenses related to the new health care exchanges.

Boeing – The jet maker has reached tentative agreements with its largest union and with state officials that will result in the 777X aircraft being built in Washington State. Boeing will get tax breaks from the state and eight additional years of labor peace as a result, although the International Association of Machinists and Aerospace Workers must still vote to approve the pact.

Time Warner– The media company earned $1.01 per share for the third quarter, 12 cents above estimates, though revenue was slightly below. Earnings were driven by strong performances from the company's TV Networks, although results at the film and publishing segments held back revenue growth.

Hospira – The provider of injectable drugs earned 51 cents per share for the third quarter, six cents above estimates, with revenue also exceeding consensus.

Chesapeake Energy – The energy producer matched Street estimates with third quarter profit of 43 cents per share, but revenue was well above estimates on increased oil and natural gas production.

Apple – Apple is adding manufacturing partners to increase production of the iPhone 5C and iPad Mini, according to the Wall Street Journal.

Buffalo Wild Wings – Miller Tabak downgraded the restaurant operator's stock to "hold" from "buy", based on valuation following the recent runup in the stock's price.

Ensco – The provider of offshore drilling services raised its quarterly dividend by 50 percent to 75 cents from 50 cents.

AmerisourceBergen – The drug distributor raised its quarterly dividend to 23-1/2 cents from 21 cents, an increase of 11.9 percent.

Molson Coors – The beer brewer reported third quarter profit of $1.45 per share, excluding certain items, six cents above estimates, with revenue also beating analyst forecasts. Molson Coors said its performance came despite seeing the anticipated weakness in consumer demand during the quarter.

Abercrombie & Fitch - The retailer reported a 14 percent drop in comparable store sales for the third quarter, the seventh straight quarterly decline. Abercrombie also cut its full-year earnings per share guidance to $1.40 - $1.50 compared to analyst estimates of $1.96.

21st Century Fox – The company earned 33 cents per share, excluding certain items, for its first quarter, two cents shy of estimates, though revenue was above consensus. The company's bottom line was impacted by launch costs for new cable networks. Earlier this year, the old News Corp. spun off publishing and other assets into a new company that took the News Corp. name, while the remaining assets were renamed 21st Century Fox.

Microsoft – The software giant is said to have narrowed its short list of candidates to succeed CEO Steve Ballmer. Reuters reports Ford CEO Alan Mulally and Nokia CEO Stephen Elop remain on the list.

Tesla – Tesla earned 12 cents per share, excluding certain items, for the third quarter, one cent above estimates, while revenue was well above consensus. However, the automaker's 5,500 new car deliveries during the quarter was below what some analysts had anticipated.

Live Nation – Live Nation reported third quarter revenue of $2.26 billion, above Street estimates, but profits were hurt by a $36 million loss on moves to extinguish debt. The concert promoter's top line has been benefiting from increased ticket sales as more performers went out on tour.

Bloomin' Brands – The operator of Outback Steakhouse and other chains earned third quarter profit of 10 cents per share, excluding certain items, matching Street estimates. The restaurant operator lowered its sales guidance for the year.

OpenTable – OpenTable reported third quarter profit of 50 cents per share, excluding certain items, beating estimates by eight cents. The restaurant reservation service is also forecasting a current quarter revenue range that comes in mostly above Street forecasts.

Zillow – Zillow lost five cents per share for the third quarter, a smaller loss than analysts had been expecting. The real estate web site operator's results were helped by the recovery in the U.S. housing market.

Papa John's –Papa John's reported in-line third quarter earnings of 65 cents per share. The pizza restaurant operator raised its full-year forecast largely above Wall Street estimates, and also announced a two-for-one stock split.

Toyota – The automaker reported a 70 percent increase in profit for its latest quarter compared to a year earlier, and raised its profit forecast for the fiscal year ending in March. Toyota was helped by a weaker Japanese yen and cost cuts, overcoming a small sales decline.

Cardinal Health – Sterne Agee upgraded the drug wholesaler's shares to "buy" from "neutral".

—By CNBC's Peter Schacknow

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