(QMCO)

Reporting relationship: Chief Accounting Officer
Issuer ticker: QMCO
Reported as of: 01 Apr 2026
Net transaction value: -$593
SEC form: 4
Accepted by SEC: 03 Apr 2026, 16:15:38 UTC
Prior SEC filing: 03 Oct 2025
Next SEC filing: 07 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash

Key filing fact

Laura A. Nash filed Form 4 for QUANTUM CORP /DE/ (QMCO) on 03 Apr 2026.

Key facts

This page summarizes Laura A. Nash's Form 4 filing for QUANTUM CORP /DE/ (QMCO).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 03 Apr 2026, 16:15.

Change

Previous filing in this sequence was filed on 03 Oct 2025.
Current net transaction value: -$593.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001979364 Primary reporting owner

Nash Laura A.

Relationship: Chief Accounting Officer
Address: C/O QUANTUM CORPORATION, 10770 E. BRIARWOOD AVE, CENTENNIAL
Signature: /s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash
Signature date: 03 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

QMCO transaction

Common Stock

Sale

Transaction value: $593
Shares: -109
Change %: -0.98%
Price: $5.44
Shares after: 11,030
Date: 02 Apr 2026
Ownership: Direct
Footnotes: F1, F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

QMCO transaction Derivative

Employee Stock Option (right to buy)

Award

Transaction value
Shares: +49,500
Change %
Price: $0.000000^*
Shares after: 49,500
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 49,500
Exercise price: $5.03
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote 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 April 1, 2024.

Footnote F2

Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on April 2, 2026, at a price ranging from $5.43 to $5.45. 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.

Footnote F3

This nonstatutory stock option vests over four years in equal monthly installments beginning on April 1, 2026, subject to the Reporting Persons continued service through each vesting date.