Statement of Changes in Beneficial Ownership (Form 4)

Ownership Submission

FORM 4 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 that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * PACIFIC INVESTMENT MANAGEMENT CO LLC 2. Issuer Name and Ticker or Trading Symbol QUANTUM CORP /DE/ [QMCO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 650 NEWPORT CENTER DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 01/03/2025 (Street) NEWPORT BEACH, CA 92660 4. If Amendment, Date Original Filed (Month/Day/Year) 6. Individual or Joint/Group Filing (Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) 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 01/03/2025 X 114,155 A $54.20 626,572 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 100,578 D $61.52 525,994 I See Footnote(1)(2) Common Stock 01/03/2025 X 219,970 A $26 745,964 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 92,970 D $61.52 652,994 I See Footnote(1)(2) Common Stock 01/03/2025 X 63,435 A $6.20 716,429 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 6,393 D $61.52 710,036 I See Footnote(1)(2) Common Stock 01/03/2025 X 37,536 A $6.20 747,572 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 3,783 D $61.52 743,789 I See Footnote(1)(2) Common Stock 01/03/2025 X 18,750 A $6.20 762,539 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 1,889 D $61.52 760,650 I See Footnote(1)(2) Common Stock 01/03/2025 X 224,059 A $6.20 984,709 I See Footnote(1)(2) Common Stock 01/03/2025 S(1)(2) 22,582 D $61.52 962,127 I See Footnote(1)(2)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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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 Underlying Securities (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 of Derivative Security: 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

Warrants (right to buy)

$61.52

01/03/2025

X

114,155

06/16/2020

06/16/2030

Common Stock

114,155

$ 0

0

I

See Footnote(1)(2)

Warrants (right to buy)

$61.52

01/03/2025

X

219,970

12/27/2018

12/27/2028

Common Stock

219,970

$ 0

0

I

See Footnote(1)(2)

Warrants (right to buy)

$61.52

01/03/2025

X

63,435

06/01/2023

06/01/2033

Common Stock

63,435

$ 0

0

I

See Footnote(1)(2)

Warrants (right to buy)

$61.52

01/03/2025

X

37,536

05/24/2024

05/24/2034

Common Stock

37,536

$ 0

0

I

See Footnote(1)(2)

Warrants (right to buy)

$61.52

01/03/2025

X

18,750

07/11/2024

07/11/2034

Common Stock

18,750

$ 0

0

I

See Footnote(1)(2)

Warrants (right to buy)

$61.52

01/03/2025

X

224,059

08/13/2024

08/13/2034

Common Stock

224,059

$ 0

0

I

See Footnote(1)(2)

Reporting Owners

Reporting Owner Name / Address	Relationships
Director	10% Owner	Officer	Other
PACIFIC INVESTMENT MANAGEMENT CO LLC 650 NEWPORT CENTER DRIVE NEWPORT BEACH, CA 92660		X

Signatures

/s/ Alyssa Creighton, Senior Vice President, Pacific Investment Management Company LLC	01/07/2025
**Signature of Reporting Person	Date

Explanation of Responses:

*	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).
(1)	On January 3, 2025, the reporting person exercised (a) a warrant to purchase 114,155 shares of Quantum Corporation's common stock, par value $0.01 per share (the "Common Stock"), for $54.20 a share, (b) a warrant to purchase 219,970 shares of Common Stock for $26.00 a share, (c) a warrant to purchase 63,435 shares of Common Stock for $6.20 a share, (d) a warrant to purchase 37,536 shares of Common Stock for $6.20 a share, (e) a warrant to purchase 18,750 shares of Common Stock for $6.20 a share, and (f) a warrant to purchase 224,059 shares of Common Stock for $6.20 a share. The reporting person paid the exercise price for each of these warrants on a cashless basis, resulting in Quantum Corporation withholding an aggregate of 228,195 of the warrant shares to pay the exercise price and issuing to the reporting person the remaining 449,710 shares.
(2)	(Continued from footnote 1) The securities are held by certain funds and accounts for which the reporting person serves as investment manager, advisor or sub-advisor, including (i) OC II FIE V LP, which holds 289,620 shares of Common Stock and (ii) OC III LVS XL LP, which holds 672,507 shares of Common Stock. The reporting person disclaims beneficial ownership in the reported securities, except to the extent of its pecuniary interest therein.

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