Quantum (QMCO) 4: White Yue Zhou bought 12,000 shares at $0.00 on 2026-10-01 (Oct 5, 2026)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-10-01 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: QUANTUM CORP /DE/ (QMCO) CIK: 0000709283 --- Reporting Owner --- Name: White Yue Zhou CIK: 0001875944 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-10-01 | Code: A (Grant or award) Shares: +12,000 | Price: $0.00 Shares Owned After: 53,139 | Ownership: D (Direct) Footnotes: [F1] Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the Reporting Persons continued service on the Companys Board of Directors. --- Footnotes (Complete Index) --- F1: Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the Reporting Persons continued service on the Companys Board of Directors. --- Signature --- /s/ /s/ Tara Ilges, Attorney-In-Fact for Yue Zhou White (2026-10-05)