=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-07-02
10b5-1 Pre-arranged Plan: No
--- Issuer ---
Name: QUANTUM CORP /DE/ (QMCO)
CIK: 0000709283
--- Reporting Owner ---
Name: Nash Laura A.
CIK: 0001979364
Role: Officer (Chief Accounting Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-07-02 | Code: S (Open market sale)
Shares: -260 | Price: $10.51
Total Value: $2,732.60
Shares Owned After: 10,770 | Ownership: D (Direct)
Footnotes:
[F1] Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted
on July 1, 2023. This Form 4 is a required filing under the Securities Exchange Act of 1934, and the securities in this Form 4 are subject to the terms of that certain Lock-Up Letter
Agreement, by and between the issuer and the Reporting Person, dated as of June 1, 2026, and is subject to clause (h) thereunder.
[F2] Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on July 2, 2026, at a price ranging from $10.48 to
$10.53. The Reporting Person undertakes to provide upon request by the Securities and Exchange Commission, the issuer, or a securityholder of the issuer detailed information regarding
the number of shares sold and the prices at which the transactions were executed.
--- Footnotes (Complete Index) ---
F1: Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted
on July 1, 2023. This Form 4 is a required filing under the Securities Exchange Act of 1934, and the securities in this Form 4 are subject to the terms of that certain Lock-Up Letter
Agreement, by and between the issuer and the Reporting Person, dated as of June 1, 2026, and is subject to clause (h) thereunder.
F2: Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on July 2, 2026, at a price ranging from $10.48 to
$10.53. The Reporting Person undertakes to provide upon request by the Securities and Exchange Commission, the issuer, or a securityholder of the issuer detailed information regarding
the number of shares sold and the prices at which the transactions were executed.
--- Signature ---
/s/ /s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash (2026-07-07)
