Compuware - The software company climbed after it and Thoma Bravo said the private-equity firm would buy Compuware for about $2.5 billion, or $10.92 a share.
Conn's - The furniture and home-appliance retailer slid after reporting lower-than-expected second-quarter earnings and cutting its full-year earnings outlook.
Darden Restaurants - The owner of LongHorn Steakhouse and Olive Garden edged higher after nominating eight new directors to its board in a bid to avert a proxy battle.
Exelixis - The drug developer lost more than half its value after saying its potential treatment for an advanced form of prostate cancer did not meet a main goal.
Halliburton - The provider of oilfield services declined after saying it reached a $1.1 billion settlement for a majority of claims stemming from its role in the BP spill in the Gulf of Mexico in 2010.
Nike - The seller of athletic apparel rose after professional basketball player Kevin Durant said he would re-signed as a Nike endorser after rejecting an offer from Under Armour.
Norwegian Cruise Line Holdings - The cruise line climbed after saying it would buy Prestige Cruises for about $3 billion in cash and stock.
Select Income REIT Common Share - The real estate investment trust fell after saying it would spend about $3 billion in cash and stock to buy REIT Cole Corporate Income Trust.
Synaptics - The maker of touchscreens climbed after Barron's said fingerprint identification technology used in smartphones could increase the value of its shares.
Teva Pharmaceutical Industries - The drug maker fell a fraction after it reported results from studies of its asthma drug.
United Continental Holdings - The carrier and rivals including Delta Air Lines, American Airlines Group and Southwest Airlines advanced as oil prices declines.
Wynn Resorts - The casino operator and competitors including Las Vegas Sands, MGM Resorts International and Melco Crown Entertainment fell after weaker-than-expected Macau gaming revenue in August.
(See CNBC's Market Insider Blog)
—By CNBC's Rich Fisherman.
Questions? Comments? Email us at firstname.lastname@example.org