(QMCO)

Role: President & CEO, Director
Signature: /s/ Tara Ilges, attorney-in-fact for Hugues Meyrath
Issuer symbol: QMCO
Transactions as of: 02 Oct 2025
Net transactions value: -$32,308
Form type: 4
Filing time: 03 Oct 2025, 17:22:06 UTC
Previous filing: 19 Nov 2024
Next filing: 04 Nov 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Meyrath Hugues	President & CEO, Director	C/O QUANTUM CORPORATION, 10770 E. BRIARWOOD AVE, CENTENNIAL	/s/ Tara Ilges, attorney-in-fact for Hugues Meyrath	03 Oct 2025	0001419111

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QMCO	Common Stock	Sale	$32,308	-2,975	-11%	$10.86	24,700	02 Oct 2025	Direct	F1, F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
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 October 1, 2024.
F2	Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on October 2, 2025, at a price ranging from $10.85 to $10.87. 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.

Content

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 October 1, 2024.

Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on October 2, 2025, at a price ranging from $10.85 to $10.87. 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.