Cyber-Ark Software - The Israeli developer of security software rallied as making its market debut.
Egalet - The pharmaceutical company fell after a Stifel Nicolaus analyst lowered her price target on its shares to $18 from $20.
Hasbro - The toy maker climbed after reaching agreement with Walt Disney to create dolls based on characters from last year's animated film hit Frozen.
KB Home - The home builder fell after reporting quarterly results that missed Wall Street's expectations.
Merrimack Pharmaceuticals - The drug developer rallied after saying it would develop its drug to treat pancreatic cancer outside the U.S. with Baxter International.
Skechers USA - The shoemaker dropped after a Sterne Agee & Leach analyst noted declining sales as the back-to-school shopping season nears an end.
Transocean - The provider of offshore drilling services and competitors including Range Resources, Diamond Offshore Drilling, Noble, Chesapeake Energy and Halliburton declined along with the price of oil.
Valeant Pharmaceuticals International - The drug manufacturer advanced after saying it expects to post better-than-expected results for its third quarter.
(See CNBC's Market Insider Blog)
—By CNBC's Kate Gibson
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