Benzinga's Top Upgrades, Downgrades For March 30, 2017 By: Benzinga via Benzinga March 30, 2017 at 09:42 AM EDT Top Upgrades Lake Street upgraded Sigma Designs Inc (NASDAQ: SIGM) from Hold to Buy. Sigma Designs shares closed at $5.95 on ... Read More >> Related Stocks: Biomarin Pharmaceuticals ConocoPhillips Cyberark Soft Ord Cypress Semiconductor EOG Resources Galectin Therapeutic Global Payments Inc Goodyear Tire & Rub Lululemon Athletica Martin Marietta Materials Qualys Inc Range Resources Secureworks Corp CS Sigma Designs Inc Sunoco LP United Therapeutic Vulcan Materials Willdan Group Inc