Quantum CAO sells 260 shares for tax withholding

Quantum Corp’s Chief Accounting Officer, Laura A. Nash, reported an automatic sale of company stock tied to tax obligations.

Rhea-AI Filing Summary

Quantum Corp’s Chief Accounting Officer, Laura A. Nash, reported an automatic sale of company stock tied to tax obligations. On July 2, 2026, 260 shares of common stock were sold at a weighted average price of $10.51 per share to cover tax withholding from restricted stock units that vested from a July 1, 2023 grant. After this transaction, Nash directly holds 10,770 shares of Quantum common stock. The sale was executed on a non-discretionary basis as part of block trades for multiple security holders and is also subject to a Lock-Up Letter Agreement dated June 1, 2026.

Insider Trade Summary

Net Seller: 260 shares

Net Sell 1 txn

Insider Nash Laura A.

Role Chief Accounting Officer

Sold 260 shs ($3K)

Type	Security	Shares	Price	Value
Sale	Common Stock	260	$10.51	$3K

Holdings After Transaction: Common Stock — 10,770 shares (Direct)

Footnotes (2)

1. 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.
2. 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.

Key Figures

Shares sold: 260 shares Weighted average sale price: $10.51 per share Shares held after transaction: 10,770 shares +2 more

5 metrics

Shares sold 260 shares Open-market sale on July 2, 2026

Weighted average sale price $10.51 per share Block trades between $10.48 and $10.53

Shares held after transaction 10,770 shares Direct ownership following July 2, 2026 sale

RSU grant date July 1, 2023 Vesting triggered tax withholding sale

Lock-up agreement date June 1, 2026 Lock-Up Letter Agreement governing securities

Key Terms

restricted stock units, weighted average price, block trades, Lock-Up Letter Agreement, +1 more

5 terms

restricted stock units financial

"to cover tax withholding obligations in connection with the vesting of restricted stock units granted on July 1, 2023"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

weighted average price financial

"Represents a weighted average price. These shares were sold as part of block trades"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

block trades financial

"These shares were sold as part of block trades for multiple security holders of the issuer"

A block trade is a single, large buy or sell of shares or bonds arranged privately between big traders rather than piecemeal on the public market. Think of it like buying a whole shipment at once instead of many small shopping trips; it lets large holders move big positions with less immediate disruption but can signal strong buying or selling pressure and cause price swings once the trade is known, so investors watch block trades for clues about market sentiment and liquidity.

Lock-Up Letter Agreement regulatory

"subject to the terms of that certain Lock-Up Letter Agreement, by and between the issuer and the Reporting Person"

tax withholding obligations financial

"automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Quantum Corp (QMCO) report for Laura A. Nash?

Quantum Corp reported that Chief Accounting Officer Laura A. Nash sold 260 shares of common stock. The sale occurred on July 2, 2026, at a weighted average price of $10.51 per share and was executed to satisfy tax withholding obligations from vested restricted stock units.

Why were Quantum Corp (QMCO) shares sold in Laura A. Nash’s Form 4 filing?

The 260 Quantum Corp shares were automatically sold to cover tax withholding obligations. These taxes arose from the vesting of restricted stock units originally granted on July 1, 2023, making the transaction a non-discretionary, tax-related sale rather than a voluntary portfolio decision.

What price did Laura A. Nash receive for her Quantum Corp (QMCO) share sale?

Laura A. Nash’s 260 Quantum Corp shares were sold at a weighted average price of $10.51 per share. According to the filing, the shares were part of block trades for multiple holders, with individual execution prices ranging from $10.48 to $10.53 on July 2, 2026.

How many Quantum Corp (QMCO) shares does Laura A. Nash hold after this transaction?

Following the tax-related sale, Laura A. Nash directly holds 10,770 shares of Quantum Corp common stock. This post-transaction holding amount is explicitly stated in the Form 4 and reflects her remaining direct ownership after the 260-share disposition.

Were Laura A. Nash’s Quantum Corp (QMCO) share sales discretionary trades?

No, the Form 4 states the shares were automatically sold on a non-discretionary basis. The purpose was to cover tax withholding obligations tied to the vesting of restricted stock units, rather than a discretionary decision to trade Quantum Corp shares in the open market.

What agreement covers Laura A. Nash’s Quantum Corp (QMCO) securities in this filing?

The securities in Laura A. Nash’s Form 4 are subject to a Lock-Up Letter Agreement dated June 1, 2026. The filing notes that the transaction is governed by this agreement and specifically references clause (h) as applying to these reported securities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 07/07/2026 - 04:09 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Nash Laura A.

(Last) (First) (Middle)

C/O QUANTUM CORPORATION

10770 E. BRIARWOOD AVE

(Street)

CENTENNIAL COLORADO 80112

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
QUANTUM CORP /DE/ [ QMCO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Accounting Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	07/02/2026		S		260(1)	D	$10.51(2)	10,770	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

Remarks:

	/s/ Tara Ilges, Attorney-in-Fact for Laura A. Nash	07/07/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)