Check out which companies are making headlines after the bell Thursday:
El Pollo Loco Holdings - The operator of quick-service restaurants reported second-quarter earnings per share of 16 cents, excluding items, on $87 million in revenue, compared to expectations of EPS of 16 cents on $86 million in sales. Shares rose in after-hours trading.
The Gap - The clothing retailer slid in after-hours trading after reporting disappointing August sales results.
Nanosphere - The provider of molecular diagnostics rallied in after-hours trading after saying it had retained Jefferies to help it review its strategic alternatives.
OncoMed Pharmaceuticals - Shares of the drug developer rose after it said the U.S. Food and Drug Administration had removed a partial clinical hold on its study of its anti-tumor protein.
Quiksilver - The distributor of apparel for surfers and skateboarders declined in after-hours trading after it reported third-quarter results.
Zumiez - The specialty retailer fell in after-hours trading following a third-quarter outlook that came in below expectations.
—By CNBC's Kate Gibson
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