Early movers: HRB, URBN, MFRM, TSLA, MBLY, AMZN, AMAT, VIAB and more

Check out the companies making headlines before Friday's bell:

H&R Block — The tax-preparation firm reported adjusted quarterly profit of $3.16 per share, 1 cent above estimates. Revenue was very slightly above estimates, and the company also announced a 10-percent dividend increase to 22 cents per share. Block also said it was intensifying its focus on stemming client losses and lowering its costs.

Urban Outfitters — Urban Outfitters said current quarter comparable-store sales are falling by a "mid single-digit" percentage. That projection — coming in an SEC filing — compares to consensus analyst forecasts for a 1.1-percent increase in comparable sales.

Mattress Firm — Mattress Firm lost an adjusted 10 cents per share for its latest quarter, 6 cents wider than estimates, while the mattress seller's revenue also came up short of forecasts. The company also issued weaker-than-expected current-quarter and full-year guidance, due in part to costs related to rebranding stores acquired through acquisitions.

Tesla — Tesla is under scrutiny on news that the National Highway Traffic Safety Administration is examining suspension issues related to Tesla's Model S. For its part, Tesla said NHTSA had not opened any investigation. The electric-car maker maintains that there are no safety defects in either the Model S or Model X.

Mobileye, Delphi Automotive — The two automotive stocks were rated "overweight" in new coverage at Piper Jaffray. The firm feels the two companies have the best opportunity to benefit from automation and connectivity technologies taking hold in the auto industry.

Amazon.com — William Blair began coverage on the online retailer with an "outperform" rating, based in large part on the potential growth of the company's Amazon Web Services business.

Applied Materials — The maker of semiconductor manufacturing equipment announced a new $2 billion share repurchase program, which will replace a completed $3 billion repurchase.

Viacom — Sumner Redstone-controlled National Amusements is recruiting potential new board members, according to The Wall Street Journal. That follows the ouster of Viacom Chairman and CEO Philippe Dauman and Viacom board member George Abrams.

Twitter — Twitter is attracting fewer social media ad campaigns than Facebook's Instagram service, according to a new survey done by Comcast unit Strata. That's the first time Instagram has pulled ahead of Twitter in that category.

Yahoo — Yahoo is set to put together a shortlist of bidders for its core internet assets, according to Reuters, following second round bids from Verizon, AT&T and others. CNBC's David Faber reported Thursday that Verizon's $3.5 billion-plus bid was topped by a number of other offers.

Medtronic — Medtronic won a $1.4-billion dispute versus the Internal Revenue Service, receiving a favorable U.S. tax court ruling in a battle over how much the medical device maker's profits should be taxed by Puerto Rico and how much should be subject to normal U.S. corporate tax rates.

Supervalu — Supervalu amended its planned spinoff of no-frills chain Save-A-Lot. Supervalu shareholders will own about 60 percent of Save-A-Lot, down from the originally planned 80 percent. The supermarket chain itself will hold about 40 percent, but will sell enough shares within two years to lower its stake to about 20 percent.

Wendy's — Wendy's discovered a second case of malware at its payment terminals. The restaurant chain said the number of locations affected by malware is now "significantly higher" than the 300 previously reported. The malicious software resulted in fraudulent charges on some credit and debit cards that had been legitimately used at Wendy's restaurants.

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