Benzinga's Top Upgrades By: Benzinga via Benzinga March 29, 2016 at 09:38 AM EDT Morgan Stanley upgraded Ambarella Inc (NASDAQ: AMBA) from Equal-weight to Overweight. Ambarella shares closed at $40.71 on ... Read More >> Related Stocks: Ambarella Inc Old National Bncp Seacoast Banking Corp Univl Health Services