Check out which companies are making headlines after the bell Thursday:
Warren Buffett's Berkshire Hathaway took new stakes in Archer Daniels Midland, Verisign, DirecTV, General Motors, Precision Castparts, according to a 13F filing. Shares gained in extended-hours trading.
(Read More: Stocks End Flat in Thin Session; HNZ Soars 20%)
Widely-followed activist investor Carl Icahn bought 14 million shares of Herbalife, giving him a 12.98 percent stake in the company, according to a 13D filing, sending shares sharply higher in extended-hours trading. The move came just a few weeks after the billionaire's argument on CNBC with Pershing Square's Bill Ackman over the nutrition and skin-care products company. In December, hedge fund manager William Ackman, who called Herbalife a "pyramid scheme," shorted the company's stock.
CBS - The media company posted earnings of 64 cents a share, excluding one-time items, on revenue of $3.7 billion. Analysts expected the company to post earnings of 68 cents a share on revenue of $3.78 billion. In addition, the company increased its share repurchase program by $1 billion in 2013. Shares fell in extended-hours trading.
Brocade - The networking hardware and software company posted earnings of 21 cents a share, excluding one-time items, on revenue of $589 million, topping expectations for 16 cents a share on revenue of $576 million. Still, shares edged lower in extended-hours trading.
Agilent Technologies - The biological and chemical analysis equipment company posted earnings of 63 cents a share, excluding one-time items, on revenue of $1.68 billion, missing expectations for 67 cents a share on sales of $1.69 billion. In addition, the company handed in current-quarter earnings and revenue that missed Wall Street forecasts, sending shares sharply lower in extended-hours trading.
Qlik Technologies - The software company posted quarterly results that exceeded Wall Street expectations and posted 2013 earnings and revenue guidance that topped estimates. But current-quarter outlook fell short of expectations. In addition, the company announced that its CFO Bill Sorenson will resign, citing personal reasons. Shares surged in extended-hours trading.
Procter & Gamble - The consumer goods company said it expects to incur a one-time charge in its fiscal year 2013 of $200 million to $275 million, or 7 cents a share to 9 cents a share, as a result of the Venezuelan currency devaluation. Shares slipped in extended-hours trading.
Dunkin' Brands - The parent company of Dunkin' Donuts said it expects to see full-year earnings of between $1.50 a share and $1.53 a share, mostly in line with estimates for $1.52 a share. Shares were largely unchanged in extended-hours trading.
Abbott Labs - Stifel Nicolaus initiated coverage of the pharmaceuticals and health care products company with a "buy" rating and a price target of $40.
UPS - The package delivery company increased its quarterly dividend to 62 cents a share from 57 cents a share. In addition, the company's board authorized the company's share buyback program for $10 billion. Shares edged higher in extended-hours trading.
Scripps Networks Interactive - The media company boosted its quarterly dividend by 25 percent to 15 cents a share from 12 cents a share.
PNC Bank - The financial company announced President William Demchak will succeed James Rohr as CEO at the annual shareholders meeting in April.