Check out which companies are making headlines before the bell on Tuesday:
Zynga — The company named Microsoft executive Don Mattrick as chief executive officer, replacing founder Mark Pincus, who will remain chairman. Mattrick is best known for building Microsoft's Xbox business, and his appointment had first been reported by All Things D during the trading day Monday.
Nielsen Holdings — Nielsen will join the S&P 500 after the close on July 8, replacing Sprint Nextel. Sprint will still be publicly traded after Japan's SoftBank acquires the bulk of its shares, but its public float will fall below the 50 percent level required for inclusion in the index.
Onyx Pharmaceuticals — Onyx remains on our watch list, after a Monday rise that followed the rejection of a takeover bid from Amgen . Reuters reports that Pfizer and Novartis are among several large pharmaceutical companies that have expressed possible interest in Onyx.
Tyco International —The Internal Revenue Service disallowed about $2.86 billion in deductions taken by Tyco for the 1997-2000 tax years, according to an SEC filing. Tyco disagrees with the IRS claims and will contest the proposed adjustments in U.S. tax court. The ruling could also impact the stocks of companies spun off by Tyco since 2000, including ADT, Covidien, and Pentair.
Constellation Brands— The spirits maker reported quarterly profit of 38 cents per share, excluding certain items, two cents below estimates, with revenue slightly short as well. The company does call the acquisition of Grupo Modelo's U.S. beer business "transformational", increasing the size and scope of the company.
American Capital Realty Properties — The real estate investment trust - which has struck several multibillion dollar deals over the past few months - is buying another REIT, ARCT IV, for $3.1 billion in cash and stock. The deal gives ARCP a total of nearly 26 hundred single tenant properties in 48 states and Puerto Rico.
Starbucks — The coffee chain is said to be testing cold fountain drinks, according to the Wall Street Journal. A drink known as "Cold Foam Mocha" is now available at some of its Nashville locations.
Achillion Pharmaceuticals —The FDA has put a clinical hold on the company's oral hepatitis C treatment known as sovaprevir, citing safety concerns over the drug's interaction with an HIV treatment.
A. Schulman — The maker of plastic compounds lowered its outlook for the fiscal year because of inconsistent orders in its European markets.
JPMorgan Chase—Raymond James upgraded the stock to "strong buy" from "outperform", raising the price target to $64 per share from $55. The firm sees a more favorable outlook for earnings growth, and diminished residual risk from the London Whale incident.
Wells Fargo —Keefe Bruyette & Woods downgraded the bank's stock to "market perform" from "outperform" on valuation, with the stock now within four percent of the firm's target price.
Dunkin' Brands —Lazard began coverage of the Dunkin' Donuts chain operator with a "buy" rating, saying consistent and meaningful cash flow generated by its stores justify a premium multiple.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Peter Schacknow
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