Check out which companies are making headlines before the bell:
National Bank of Greece–These and other Greece-related stocks are under pressure this morning, following the failure of Greek debt talks over the weekend.
JPMorgan Chase–Oppenheimer downgraded the bank to "perform" from "outperform" on the idea that valuations may be outrunning fundamentals given the lack of earnings drivers.
Macy's–The retailer's stock was downgraded to "sell" from "buy" at Deutsche Bank, reflecting the firm's "low confidence" that Macy's can break out of a "same-store sales rut."
Gannett–The company splits in two, effective today. The existing parent company is renamed Tegna and will own 46 broadcast stations as well as the Cars.com and Careerbuilder.com websites. The newspaper operation, including USA Today, are spun out into a new company which will carry the Gannett name and ticker symbol.
Twitter–Vice President of Corporate Development and Strategy Rishi Garg resigned to pursue other interests, according to Re/code. He joined Twitter in May 2014.
EBay–The company's board of directors approved the previously announced separation of the company's PayPal operation into an independent publicly traded company.
Amazon.com–Amazon is expanding its small business loan program to eight more countries later this year, including China. Right now the service is only available in the United States and Japan.
General Electric–GE will speak to European regulators about its proposed acquisition of Alstom's power unit at a hearing set for Thursday. Regulators have expressed doubts about the deal, saying it would harm competition. Separately, GE announced a deal to sell its fleet businesses in the U.S., Mexico, Australia, and New Zealand to Element Financial for $6.9 billion.
Novartis–The drug maker is buying biotech firm Spinifex Pharmaceuticals, which specializes in pain management, for $200 million, with the possibility of further payments in the future. Spinifex is currently owned by venture capital firms in the U.S. and Australia.
Humana, Aetna, Cigna, Anthem–These and other health insurers remain on watch, both due to continued merger and acquisition activity and rumors, as well as a Wall Street Journal article saying the Justice Department will implement strict reviews of any proposed deals.