Which stocks are making significant moves premarket in the latest stock market update?

Novavax and Sweetgreen are the stocks making significant moves premarket in the latest stock market update. Novavax surged over 100% due to a Covid vaccine deal with Sanofi, while Sweetgreen's stock soared 20% after raising its guidance for the year. These two companies experienced notable shifts in their stock prices based on their respective announcements and market reactions.