Ambarella Ambarella manufactures image application processors for action cameras, drones, dash cams, security cameras, and other markets. However, its top customer is GoPro ( GPRO -3.82% ), which is expected to post a 15% decline in sales in 2016 due to sluggish demand for action cameras. Pacific Crest estimates that GoPro orders will still account for around a quarter of Ambarella's sales this year.