Why Is Novavax ($NVAX) Stock Up +20.65% Today? (Find out why any stock moved today on Tickeron.) NVAX shares surged roughly 20.65%, climbing about $2.16 to $12.62 from a prior close of $10.46. The primary catalyst was a U.S. Food and Drug Administration (FDA) conditional approval of Novavax's updated COVID-19 vaccine. Secondary support came from momentum in the company's Matrix-M adjuvant licensing business, which has now been authorized across multiple global pharmaceutical partners. The move pushed the stock to a new 52-week high, extending a multi-week rally tied to the company's pivot toward a partnership-driven model. $CRSP $MRNA $BNTX $EDIT $RXRX