Quantum grants COO Clancy 150,000 stock units

The awards' vesting schedules require continued service through each applicable vesting date.

Rhea-AI Filing Summary

Quantum Corp (QMCO) granted Chief Operating Officer James C. Clancy 150,000 restricted stock units and options covering 400,000 common shares on October 1, 2026. The RSUs vest in three equal annual installments beginning October 1, 2027, subject to continued service. The options have a $31.885 exercise price, expire October 1, 2033, and vest in equal monthly installments over four years beginning November 1, 2026, subject to continued service. Clancy held 163,000 shares of common stock directly following the RSU grant.

Insider Trade Summary

Grant/Award: 550,000 shares

Grant/Award 2 txns

Insider Clancy James C

Role Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Employee Stock Option (right to buy) F2	400,000	$0.00	$0.00
Grant/Award	Common Stock F1	150,000	$0.00	$0.00

Holdings After Transaction: Employee Stock Option (right to buy) — 400,000 contracts (Direct); Common Stock — 163,000 shares (Direct)

Footnotes (2)

1. F1. Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in three equal annual installments beginning on October 1, 2027, with a vesting commencement date of October 1, 2026, subject to the Reporting Persons continued service through each vesting date.
2. F2. This nonstatutory stock option vests over four years in equal monthly installments beginning on November 1, 2026, with a vesting commencement date of October 1, 2026, subject to the Reporting Persons continued service through each vesting date.

Key Figures

Restricted stock units: 150,000 RSUs Shares underlying options: 400,000 shares Option exercise price: $31.885 per share +4 more

7 metrics

Restricted stock units 150,000 RSUs Granted October 1, 2026

Shares underlying options 400,000 shares Options granted October 1, 2026

Option exercise price $31.885 per share Options granted to James C. Clancy

Direct common shares following RSU grant 163,000 shares Following the October 1, 2026 grant

RSU vesting installments 3 equal annual installments Beginning October 1, 2027, subject to continued service

Option vesting period 4 years Equal monthly installments beginning November 1, 2026, subject to continued service

Option expiration date October 1, 2033 Options granted to James C. Clancy

Key Terms

restricted stock units (RSUs), nonstatutory stock option, vesting commencement date

3 terms

restricted stock units (RSUs) financial

"Grant of restricted stock units (RSUs)"

Restricted stock units (RSUs) are a type of company promise to give employees shares of stock in the future, usually after certain conditions like working for a set time. They are like a gift promised today that you receive later, which can become valuable if the company's stock price goes up. RSUs matter because they are a way companies reward employees and can be a significant part of compensation.

nonstatutory stock option financial

"This nonstatutory stock option vests over four years"

A nonstatutory stock option (also called a non-qualified stock option) is an employee or contractor right to buy company shares at a set price that does not qualify for special tax treatment. When exercised, the difference between the market price and the set price is treated as ordinary income for the recipient and usually triggers payroll tax and withholding. For investors, these options matter because they create potential share dilution, affect reported compensation costs, and influence the timing of when new shares enter the market—similar to a coupon that lets someone buy stock at a discount but results in an immediate tax bill.

vesting commencement date financial

"with a vesting commencement date of October 1, 2026"

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

FAQ

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

What did QMCO's COO receive in the October 2026 award?

James C. Clancy received 150,000 restricted stock units and options covering 400,000 common shares on October 1, 2026. Each RSU represents a contingent right to receive one common share.

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

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Available on EDGAR 10/05/2026 - 05:17 PM Accepted by SEC EDGAR 10/05/2026 - 05:16 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^*

Clancy James C

(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 Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2026

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	10/01/2026		A		150,000(1)	A	$0	163,000	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
Employee Stock Option (right to buy)	$31.885	10/01/2026		A		400,000		(2)	10/01/2033	Common Stock	400,000	$0	400,000	D

Explanation of Responses:

1. Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in three equal annual installments beginning on October 1, 2027, with a vesting commencement date of October 1, 2026, subject to the Reporting Persons continued service through each vesting date.

2. This nonstatutory stock option vests over four years in equal monthly installments beginning on November 1, 2026, with a vesting commencement date of October 1, 2026, subject to the Reporting Persons continued service through each vesting date.

Remarks:

	/s/ Tara Ilges, attorney-in-fact for James C. Clancy	10/05/2026
	** 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)