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After-hours buzz: LULU, NTNX, AMBA & more

Check out the companies making headlines after the bell:

Lululemon Athletica shares rose 4.7 percent during extended trading. The athletic clothing company's second quarter earnings and revenue came in above Wall Street estimates. Same-store sales also exceeded estimates.

Palo Alto's stock rose 5.6 percent after hours following the company's fourth quarter earnings report. The company's revenue and earnings for the period easily topped analysts' expectations.

Nutanix shares rose 3.4 percent during extended trading after the company reported a loss of 33 cents per share, 5 cents better than Wall Street analysts' estimates. The cloud computing also posted a top line that exceeded expectations.

Shares of Ambarella fell nearly 10 percent despite posting third quarter earnings that beat the Street's forecasts. The video technology company's non-adjusted gross margin shrunk to 63 percent in the quarter, down from 67.1 percent in the same time last year. Ambarella repurchased 595,770 shares during the quarter.