Quantum: Oaktree reports 2.29% stake in common shares

Available on EDGAR 11/13/2026 - 06:30 PM EST Accepted by SEC EDGAR 11/13/2026 - 06:30 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Oaktree Capital Management, L.P. reported beneficial ownership of 901,793 Quantum Corporation (QMCO) common shares, equal to 2.29% of the class. It reported sole voting and dispositive power over those shares and no shared voting or dispositive power. The reported percentage is based on 39,410,001 shares outstanding as of August 6, 2026. The shares are directly held by funds and accounts managed by Oaktree, and Oaktree stated that the report is not an admission of beneficial ownership for any purpose.

Key Figures

Beneficially owned shares: 901,793 shares Percentage of class: 2.29% Shares outstanding: 39,410,001 shares

3 metrics

Beneficially owned shares 901,793 shares Reported by Oaktree Capital Management, L.P.

Percentage of class 2.29% Reported beneficial ownership.

Shares outstanding 39,410,001 shares As of August 6, 2026; basis stated for the reported percentage.

Key Terms

beneficial ownership, sole voting power, sole dispositive power

3 terms

beneficial ownership regulatory

"Amount beneficially owned"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

sole voting power regulatory

"Sole power to vote or to direct the vote"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power regulatory

"Sole power to dispose or to direct the disposition"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

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

How many QMCO shares did Oaktree report beneficially owning?

Oaktree Capital Management, L.P. reported beneficial ownership of 901,793 Quantum Corporation common shares, representing 2.29% of the class.

Which funds and accounts directly hold Oaktree's reported QMCO shares?

The shares are directly held by Oaktree Value Opportunities Fund Holdings, L.P.; Oaktree London Liquid Value Opportunities Fund (VOF), L.P.; and Boston Patriot Arlington St LLC, each managed by Oaktree Capital Management, L.P.

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

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Quantum Corporation

(Name of Issuer)

Common Stock, $0.01 par value per share

(Title of Class of Securities)

747906600

(CUSIP Number)

09/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 747906600

1

Names of Reporting Persons

Oaktree Capital Management, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 901,793.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 901,793.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

901,793.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

2.29 %

12

Type of Reporting Person (See Instructions)

PN

Comment for Type of Reporting Person: The reported percentage is calculated based on 39,410,001 shares of common stock outstanding as of August 6, 2026, as reported on the Issuer's 10-Q filed with the Securities and Exchange Commission on August 11, 2026.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Quantum Corporation
(b)	Address of issuer's principal executive offices: 10770 E. Briarwood Avenue, Centennial, CO 80112
Item 2.
(a)	Name of person filing: This Statement is filed by Oaktree Capital Management, L.P., referred to herein as the "Reporting Person."
(b)	Address or principal business office or, if none, residence: 333 S. Grand Ave., 28th Floor, Los Angeles, CA 90071
(c)	Citizenship: See response to row 4 on the cover page hereto.
(d)	Title of class of securities: Common Stock, $0.01 par value per share
(e)	CUSIP No.: 747906600
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to row 9 on the cover page hereto. The reported securities are directly held by the following funds and accounts, each managed by the Reporting Person: (i) Oaktree Value Opportunities Fund Holdings, L.P.; (ii) Oaktree London Liquid Value Opportunities Fund (VOF), L.P.; and (iii) Boston Patriot Arlington St LLC. The filing of this Statement shall not be deemed an admission of beneficial ownership by the Reporting Person for purposes of Section 13(d) or 13(g) or for any other purpose.
(b)	Percent of class: See response to row 11 on the cover page hereto.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to row 5 on the cover page hereto.
	(ii) Shared power to vote or to direct the vote: See response to row 6 on the cover page hereto.
	(iii) Sole power to dispose or to direct the disposition of: See response to row 7 on the cover page hereto.
	(iv) Shared power to dispose or to direct the disposition of: See response to row 8 on the cover page hereto.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Oaktree Capital Management, L.P.

Signature:	/s/ Henry Orren
Name/Title:	Henry Orren / Managing Director
Date:	11/13/2026