(QMCO)

Role: Chief Accounting Officer
Signature: /s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash
Issuer symbol: QMCO
Transactions as of: 12 Sep 2025
Net transactions value: -$2,101
Form type: 4
Filing time: 17 Sep 2025, 18:29:55 UTC
Previous filing: 04 Apr 2025
Next filing: 03 Oct 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Nash Laura A.	Chief Accounting Officer	C/O QUANTUM CORPORATION, 10770 E. BRIARWOOD AVE, CENTENNIAL	/s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash	17 Sep 2025	0001979364

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	QMCO	Common Stock	Sale	$2,101	-284	-2.4%	$7.40	11,368	12 Sep 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 July 1, 2022, and July 1, 2023.
F2	Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on September 12, 2025, at a price ranging from $7.3803 to $7.41. 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 July 1, 2022, and July 1, 2023.

Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on September 12, 2025, at a price ranging from $7.3803 to $7.41. 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.