Why Is Quantum Corporation ( $QMCO ) Stock Up +9.66% Today? (Find out why any stock moved today on Tickeron.) Quantum Corporation (QMCO) shares climbed +9.66% in today's session, continuing a sharp multi-day rally. The stock traded around $32.34, up from the prior session's close of $29.49. Momentum has been fueled by the company's recent inclusion in the S&P Technology Hardware Select Industry Index. Rising demand for high-density, energy-efficient data storage tied to AI infrastructure buildouts remains a core driver. $RGTI $QUBT $QBTS $OSS