Check out the companies making headlines after the bell Thursday:
Ulta Salon - The cosmetics and fragrance retailer reported earnings of $1.04 a share, beating Wall Street expectations of 93 cents a share, with revenue also above estimates. Shares rose about 2 percent after the announcement.
Deckers Outdoor - The footwear and apparel designer topped fiscal-fourth-quarter earnings and revenue projections. Deckers' first-quarter outlook was very weak, but its full-year guidance topped projections. The stock rose more than 4 percent in after-hours trading.
GameStop - Shares jumped about 6 percent after the gaming retailer beat first-quarter estimates on the top and bottom lines. The company's second-quarter guidance was also strong.
Greif - Shares tumbled 11 percent after the industrial packing provider revised its full-year earnings guidance. It now expects 2015 adjusted earnings of between $1.65 and $1.75 per share, compared to its previous guidance of $2.25 to $2.35 per share.
Splunk - The analytics software provider reported a narrower-than-expected quarterly loss of a penny per share, on revenue of $126 million, which was above projections. Though the company also reported strong second-quarter guidance and raised its full-year outlook, shares fell about 3 percent in extended trading.
Allegheny Technologies - Shares fell about 2 percent after the specialty materials producer said it discovered a defective component at one of its processing units. It expects fourth-quarter operating profit related the facility to fall short of its previous projections by as much as $20 million, before tax.