Traders work on the floor of the New York Stock Exchange in New York.

Dresser-Rand –A German magazine said Siemens is planning to bid $80 per share or more than $6.1 billion for the maker of compressors and turbines. Earlier this week, Swiss pumping equipment company Sulzer said it was talking with Dresser-Rand about a possible deal.

Alibaba –Alibaba begins trading today after pricing its initial public offering (IPO) at $68 per share, the top of the expected range, raising a total of $21.8 billion.

Oracle — Co-founder Larry Ellison stepped down as CEO after 37 years. He'll remain as chief technology officer, and will be replaced as CEO by Oracle executives Safra Catz and Mark Hurd. The software giant also reported fiscal first quarter profit that came in below estimates, and its current quarter outlook is also short of analyst projections.

Check out which companies are making headlines before the bell:

VF Corp–The clothing maker's stock was upgraded to "buy" from "hold" at KeyBanc, which expressed confidence about the company's branding strategy and the success of its Timberland acquisition.

GlaxoSmithKline–The drug maker faces a record China fine of $491.5 million after its subsidiary was found guilty of bribery.

Concur Technologies–Concur will be bought by German software giant SAP for $129 per share in cash, a 20 percent premium for shareholders in the maker of expense management software. The deal is worth a total of $7.3 billion, including assumed debt.

Apple–The tech giant begins selling its iPhone 6 and iPhone 6 Plus in stores today, after record orders. A teardown done by repair firm iFixit shows the phones contain chips from Qualcomm, Skyworks, and Avago Technologies, among others.

Home Depot–The home improvement retailer said the malware involved in the recently announced data breach has been eliminated from its systems, and that . Despite the breach, the company has reaffirmed its full-year revenue outlook and raised its earnings forecast.

Red Hat–Red Hat earned 41 cents per share for the second quarter, excluding certain items, three cents above estimates, with revenue above consensus as well. The distributor of Linux software was helped by especially strong results in its cloud computing business.

Tibco Software–Tibco reported fiscal third quarter profit of 14 cents per share, excluding certain items, four cents below estimates, with revenue also falling short. Tibco has been hurt by shrinking profit margins, and has been evaluating strategic options for the company.

Clorox–CEO Donald Knauss is stepping down, replaced by chief operating officer Benno Dorer. Knauss will continue as executive chairman, with the change set to take place November 20.

JetBlue —President Robin Hayes will succeed Dave Barger as CEO on February 16, 2015. Hayes joined JetBlue in 2008 as executive vice president and chief commercial officer.

McDonald's–The restaurant chain raised its quarterly dividend by five percent to 85 cents per share.

Texas Instruments–The chip maker raised its quarterly dividend by 13 percent to 34 cents per share.

Wal-Mart–The retail giant is hiring 60,000 temporary workers for the holiday season, an increase of 10 percent over last year.

—By CNBC's Peter Schacknow

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