Quantum(QMCO) - Prospectus

As filed with the Securities and Exchange Commission on February 18, 2026 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Quantum Corporation (Exact Name of Registrant as Specified in Its Charter) Delaware 3572 94-2665054 (State or Other Jurisdiction of Incorporation or Organization) (Primary Standard Industrial Classification Code No.) (I.R.S. Employer Identification Number) 10770 E. Briarwood Ave ...