Take a look at some of Wednesday's midday movers:
Sotheby's - The auction house gave up opening gains. Sotheby's said it would return $450 million to investors through a special dividend and a share repurchase, but the moves drew a less-than positive reaction from two activist investors who have been pushing for changes.
Google - The internet search engine's shares fell after Reuters cited two sources in reporting Google is close to settling a three-year European antitrust probe and potentially escape a fine of as much as $5 billion.
Praxair - Shares of the coating and atmospheric and process gases distributor rose after it raised its quarterly dividend by eight percent to 65 cents a share and authorized a new share repurchase program for up to $1.5 billion of its stock.
JetBlue Airways - The carrier's shares fell rose after it reported better-than-expected fourth-quarter earnings and warned that flight cancellations this month due to bad weather in the Northeast would hurt first-quarter results.
American Airlines Group - The carrier gained after Raymond James upgraded its shares to outperform from market perform.
llumina - The life science tool maker's shares rose after it posted fourth-quarter earnings that beat estimates.
Medivation - The company's shares gained after its drug for advanced prostate cancer showed promising results in a large late study.
Hess - The oil and natural gas producer's shares gained after its fourth-quarter net income rose sharply on asset sales.
Energizer Holdings - The battery maker's shares declined after it reported weaker-than-expected first-quarter earnings.
Vringo - Shares jumped after a judge increased the royalty rate Google must pay for violating patents related to its AdWords business.
Freescale Semiconductor - Shares gained after Needham upgraded the stock to strong buy from buy.
RPC - The oilfield services firm's shares declined after it posted weaker-than-expected fourth-quarter earnings.
(Read More: See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
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