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Mattel, Inc. (NASDAQ:MAT) (The Motley Fool)
What happened: Shares of Mattel (NASDAQ:MAT) were heading lower Thursday, a day after Hasbro (NASDAQ:HAS), the toy maker’s chief rival, posted disappointing holiday-quarter results and its CEO deflected questions about a potential merger between the two companies. The broader market sell-off also seemed to weigh on the stock. As a result, Mattel stock was down 6% as of 12:08 p.m., and Hasbro was off 4.6%.

Teva Pharmaceutical Industries Ltd (ADR) (NYSE:TEVA) (MarketWatch)
Teva Pharmaceutical Industries Ltd. TEVA, -8.68% shares plummeted 10.2% in premarket trade Thursday after the company reported fourth-quarter profit and revenue beats but provided 2018 guidance that fell well short of expectations. The company reported a loss of $11.60 billion, or a loss of $11.41 per share, after a loss of $1.04 billion, or a loss of $1.10 per share. Adjusted earnings-per-share were 93 cents, compared with the FactSet consensus of 77 cents. Revenue declined to $5.46 billion from $6.49 billion, compared with the FactSet consensus of $5.29 billion.

CGG SA (ADR) (NYSE:CGG) (Benzinga)
CGG SA (ADR) shares dropped 44.1 percent to $3.33. CGG and Ardiseis have reported the successful completion of the world`s highest-density broadband seismic survey ever acquired onshore or offshore.

athenahealth, Inc (NASDAQ:ATHN) (CNBC)
Athenahealth – Athenahealth named former General Electric CEO Jeff Immelt as its chairman. He replaces Jonathan Bush, who will continue to serve as CEO. Immelt assumes the role in the midst of a shakeup at the health-related software company, which began after activist investor Elliott Management took a stake in the company last year.

Plug Power Inc (NASDAQ:PLUG) (InvestorPlace.com)
Plug Power Inc (NASDAQ:PLUG) stock was down today following the release of preliminary results for its fourth quarter of 2017. The preliminary results from Plug Power Inc’s most recent earnings report were revealed in an 8-K filing with the SEC. In the filing, PLUG says it expects revenue for the quarter to come in below $30 million. This will have it missing Wall Street’s revenue estimate of $31.99 million for the fourth quarter of 2017. Plug Power Inc also notes that it is expecting revenue for the full year of 2017 to come in below $130 million. Yet again, this would have it missing analysts’ revenue estimate for the period, which is set at $134.63 million.