Take a look at some of Friday's midday movers:
Ares Management - The private equity firm fell in its market debut after offering 11.3 million shares at $19.
Berkshire Hathaway - The investment manager declined energy unit is buying the rest of Canadian power transmission provider AltaLink for $2.9 billion.
Chevron - The oil producer slid after posting weaker-than-expected first-quarter earnings and revenue.
Endocyte - The company's shares fell after it and Merck said their jointly developed experimental cancer drug did not slow the progress of ovarian cancer.
Gold - The price of the metal rose as tensions mount in Ukraine.
News Corporation - The media company moved higher after buying romance novel publisher Harlequin Enterprises for $415 million.
Nutrisystem - The provider of weight-loss programs rose on better-than-expected quarterly results and a bullish full year outlook.
Papa Murphy's Holding - The pizza chain rose in its market debut after offering 5.8 million shares at $11.
Pharmacyclics - The biopharmaceutical company fell after releasing first-quarter earnings.
Skechers USA - The sports shoe maker declined after saying it will explore buying a stake in the Los Angeles Clippers basketball team.
Spirit AeroSystems Holdings - The maker of aircraft components gained after reporting quarterly results.
Tempur Sealy International - The mattress maker rose after Wedbush raised its rating to outperform from neutral.
Visteon - The supplier of auto systems rose after saying it would sell most of its automotive interiors business to private equity firm Cerberus Capital Management.
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—By CNBC's Rich Fisherman.
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