X0508 4/A 2024-11-08 2024-12-05 0000709283 QUANTUM CORP /DE/ QMCO 0002000334 Spanjaard Henk Jan C/O QUANTUM CORPORATION 224 AIRPORT PARKWAY, SUITE 550 SAN JOSE CA 95110 false true false false Chief Revenue Officer false Common Stock 2024-11-08 4 S false 218 4.43 D 15838 D This amendment to the original Form 4 filed on December 5, 2024 is being filed to correct the amount of shares sold, to cover tax withholding obligations in connection with the vesting of restricted stock units. As a result of this error, the number of shares reported as beneficially owned by the reporting person following the corrected transaction reflects an increase in the number of shares reported as beneficially owned in the original Form 4. /s/ Tara La Bree, Attorney-in-Fact for Henk Jan Spanjaard 2025-01-17