Check out which companies are making headlines after the bell Thursday:
Herbalife - The nutrition and skin-care products company's holder Carl Icahn disclosed a 15.6 stake in the firm, according to an amended 13D filing, up from 13.6 percent as of March 1. Shares gained in extended-hours trading.
Pandora - The automated music recommendation service posted a loss of 4 cents a share, excluding one-time items, on sales of $125 million, edging past expectations for a loss of 5 cents a share on revenue of $123 million. In addition, the company handed in current-quarter and full-year 2014 revenue guidance that were better than Wall Street estimates, sending shares sharply higher in extended-hours trading.
Separately, Pandora said its board has formed a search committee to look for a new CEO. Current CEO, president and Chairman Joe Kennedy will remain at the helm until a successor is named.
(Read More: Dow Logs New Record High Ahead of Jobs Report)
Texas Instruments - The chipmaker lifted the bottom end of its first-quarter guidance range. It now expects to post earnings of between 28 cents a share and 32 cents a share and revenue to between $2.8 billion and $2.91 billion. Wall Street analysts expect the company to post earnings of 31 cents a share on sales of $2.80 billion. Shares edged lower in extended-hours trading.
H&R Block - The tax preparer posted a loss of 6 cents a share, excluding one-time items, on sales $472 million, missing estimates for a loss of 3 cents a share on sales of $564 million. Shares declined in extended-hours trading.
Goldman Sachs and Morgan Stanley edged lower after the Federal Reserve's latest stress test results revealed that both banks were near the bottom of the list of banks surveyed in terms of capital on hand. The only other bank that could see its capital fall below 6 percent under the stress scenario was .
Cooper - The electrical products manufacturer posted earnings of $1.23 a share on revenue of $380 million, exceeding expectations for $1.19 a share on revenue of $365 million.
Thor Industries - The recreational vehicles manufacturer posted earnings of 37 cents a share, missing estimates by a penny, on revenue of $742 million, topping expectations for $716 million. Shares edged higher in extended-hours trading.
Finisar - The networking and communication devices maker posted earnings of 17 cents a share, squeezing past expectations by a penny, on revenue of $238 million, in line with estimates. In addition, the company handed in current-quarter guidance that matched Wall Street estimates, sending shares higher in extended-hours trading.
Quiksilver - The surfwear apparel retailer and sporting goods maker posted a loss of 16 cents a share on revenue of $431 million, sharply missing Wall Street forecasts for a loss of 7 cents a share on revenue of $465 million. Shares tumbled in extended-hours trading.
Skullcandy - The headphone maker posted earnings of 47 cents a share excluding one-time items, missing expectations by a penny a share, on revenue of $101 million, edging past estimates for $99 million. In addition, the company warned it expects to see a loss of between 25 cents to 30 cents a share in the first quarter, against current Wall Street expectations for a gain of 5 cents a share. Shares tumbled in extended-hours trading.
AVG Technologies - The computer software company announced CEO J. R. Smith is stepping down and will become a member of the Supervisory board.
Torchmark - The financial services company increased its dividend by 13 percent to 17 cents a share from 15 cents a share.
—By CNBC's JeeYeon Park (Follow JeeYeon on Twitter: @JeeYeonParkCNBC)
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