Check out the companies making headlines after the bell Thursday:
Nordstrom's stock tanked after hours when the retailer posted disappointing quarterly earnings. The department store retailer reported earnings of 26 cents per share on sales of $3.25 billion, missing the 45 cents per share on $3.28 billion in sales expected by analysts polled by Thomson Reuters.
It also slashed its earnings outlook for the rest of the year. The Nordstrom's report followed a slew of disappointing reports from competitors like Macy's and Kohl's.
The company is adjusting its inventory and expense plans to adapt to the changing retail landscape in response to weak sales in the first fiscal quarter, Co-president Blake Nordstrom said, in a statement. It recently announced up to 400 job cuts.
Rival Dillard's also fell after reporting earnings per share of $2.17 on revenues of $1.54 billion. That compares to the $2.52 per share on revenues of $1.56 billion expected by Thomson Reuters.
Home and furniture, ladies' accessories and lingerie were among the weakest areas for Dillard's, which saw same-store sales dip 5 percent for the quarter.
Shares of Shake Shack spiked in extended trading Thursday after the fast-casual chain reported better than expected earnings and sales. The New York City-based burger joint posted earnings of 8 cents per share on revenues of $54 million, above the 5 cents per share on $53 million in sales expected by a Thomson Reuters consensus estimate.
The company saw a nearly 10 percent increase in sales at existing stores, a key business barometer in the restaurant industry.
"The recent launch of the Chick'n Shack at all domestic company-operated locations has driven traffic growth and created an entirely new way our guests can enjoy the Shack," CEO Randy Garutti said, in a statement.
Semiconductor company Nvidia saw shares pop after its earnings surprised to the upside. Nvidia, which specializes in graphics-processing units, reported 33 cents per share in earnings on $1.31 billion in sales in the first fiscal quarter. A Thomson Reuters consensus estimate predicted 32 cents per share on $1.27 billion in sales.
The company is expecting technology trends like deep learning, gaming and virtual reality to bring a "new wave of innovations" to Nvidia's market, CEO Jen-Hsun Huang said in a statement.
— CNBC's Alex Crippen contributed to this report.