Early movers: GM, WFC, TWC, CHTR, GSK, AMZN & more

Traders wait for the Initial Public Offering for Castlight Health on the floor of the New York Stock Exchange after the opening bell on March 14, 2014 in New York City.
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Traders wait for the Initial Public Offering for Castlight Health on the floor of the New York Stock Exchange after the opening bell on March 14, 2014 in New York City.

Check out which companies are making headlines before the bell:

General Motors—CEO Mary Barra is due for a second day of testimony on Capitol Hill on the automaker's ignition switch recall. Additionally, Reuters reports GM decided in 2005 not to redesign those ignition switch because it would have added about a dollar to the cost of each car.

Wells Fargo–The bank struck a new 10-year agreement to provide and service credit cards for retailer Dillard's. Wells Fargo will replace General Electric's consumer finance unit when the agreement begins in the fourth quarter of this year. Separately, Wells Fargo chief financial officer Tim Sloan will head the bank's wholesale retail unit on May 15, and will be succeeded as CFO by current EVP John Shrewsberry.

Apollo Education–Wells Fargo upgraded the for-profit education company to "outperform" from "market perform", citing improved cost management and better new student numbers.

Agrium–The fertilizer producer is guiding first quarter earnings below current Wall Street consensus, saying a late spring season means first quarter will come in just above break-even. Analysts had been predicting first quarter profit of 53 cents per share.

GlaxoSmithKline–The drug maker decided to end a clinical trial involving its MAGE-A3 vaccine, saying it could not find a group of lung cancer patients who might benefit from the treatment. It is continuing to look into possible uses for the vaccine to treat melanoma.

MannKind–MannKind won the recommendation of an FDA panel for approval of its inhaled diabetes drug, citing its effectiveness for type 2 diabetes.

BlackBerry–The smartphone maker ended a licensing deal with T-Mobile, meaning T-Mobile won't be selling BlackBerry products for use on its network when the current contract expires on April 25.

Charter Communications–Charter could re-enter the bidding for Time Warner Cable, according to a Wall Street Journal Report. The financial dynamics of the deal have changed due to a drop in the stock prices of both Comcast and Time Warner Cable. Comcast announced its all-stock deal for Time Warner Cable on February 13.

Amazon.com–The online retailer has rolled out a new service allowing customer returns using metal lockers at various locations, according to the Wall Street Journal. Separately, the company will hold a news conference later today in New York to unveil an update to its video business.

Microsoft–The company is expected to unveil more about its future strategy for Windows today at its "Build" conference in San Francisco.

Myriad Genetics–The drug company will still see Medicare payments for its genetic screening tests cut, but not by as much as first expected.

Urban Outfitters–The retailer is reporting a "low single-digit" drop in first quarter comparable store sales, according to a new SEC filing.

By CNBC's Peter Schacknow

Questions? Comments? Email us at marketinsider@cnbc.com

  • Patti Domm

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