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.