Shares of Allegro MicroSystems, Inc. (NASDAQ:ALGM – Get Free Report) shot up 6.2% during mid-day trading on Wednesday . Weiss Ratings restated a “sell (e+)” rating on shares of Allegro MicroSystems in a research note on Monday, December 29th. TD Cowen reaffirmed a “buy” rating on shares of Allegro MicroSystems in a research note on Friday, October 31st. Allegro MicroSystems had a negative net margin of 3.60% and a positive return on equity of 2.90%. Featured StoriesReceive News & Ratings for Allegro MicroSystems Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Allegro MicroSystems and related companies with MarketBeat.com's FREE daily email newsletter.