QMCO

qtm-202602170000709283FALSE00007092832026-02-172026-02-17

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): February 17, 2026

Quantum Corporation (Exact name of registrant as specified in its charter)

Delaware001-1344994-2665054 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. Employer Identification No.)

10770 E. Briarwood Avenue Centennial,CO80112 (Address of Principal Executive Offices)(Zip Code)

(408) 944-4000 Registrant's telephone number, including area code

N/A (Former name or former address, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareQMCONasdaq Global Market

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02     Results of Financial Operations and Financial Condition.

On February 17, 2026, Quantum Corporation (the “Company”) reported its financial results for the fiscal quarter ended December 31, 2025. A copy of the Company’s earnings release is furnished as Exhibit 99.1 to this report.

The information in this Item 2.02, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that Section. The information in this Item 2.02 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933 except as shall be expressly set forth by specific reference in such filing.

Item 9.01    Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description

99.1Press Release dated February 17, 2026.

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Quantum Corporation (Registrant)

February 17, 2026/s/ William H. White (Date)William H. White Chief Financial Officer

qtm-202601150000709283FALSE00007092832026-01-152026-01-15

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): January 15, 2026

Quantum Corporation (Exact name of registrant as specified in its charter)

Delaware001-1344994-2665054 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. Employer Identification No.)

10770 E. Briarwood Avenue Centennial,CO80112 (Address of Principal Executive Offices)(Zip Code)

(408) 944-4000 Registrant's telephone number, including area code

N/A (Former name or former address, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareQMCONasdaq Global Market

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02.    Results of Financial Operations and Financial Condition.

On January 15, 2026, Quantum Corporation (the “Company”) provided preliminary financial results for its fiscal third quarter ended December 31, 2025. A copy of the Company’s press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The information in this Item 2.02, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that Section. The information in this Item 2.02 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933 except as shall be expressly set forth by specific reference in such filing.

Item 9.01.    Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description

99.1Press Release dated January 15, 2026

104Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Quantum Corporation (Registrant)

January 15, 2026/s/ Laura A. Nash (Date)Laura A. Nash Chief Accounting Officer

qtm-202511130000709283FALSE00007092832025-11-132025-11-13

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): November 13, 2025

Quantum Corporation (Exact name of registrant as specified in its charter)

Delaware001-1344994-2665054 (State or other jurisdiction of incorporation or organization)(Commission File No.)(I.R.S. Employer Identification No.)

10770 E. Briarwood Avenue Centennial,CO80112 (Address of Principal Executive Offices)(Zip Code)

(408) 944-4000 Registrant's telephone number, including area code

N/A (Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareQMCONasdaq Global Market

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02 Results of Financial Operations and Financial Condition.

On November 13, 2025, Quantum Corporation (the “Company”) reported its financial results for the fiscal quarter ended September 30, 2025. A copy of the Company’s earnings release is furnished as Exhibit 99.1 to this report.

The information in this Item 2.02, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, or otherwise subject to the liabilities of that Section. The information in this Item 2.02 shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933.

Item 9.01 Financial Statements and Exhibits.

Exhibit Number Description

99.1 Press Release dated November 13, 2025

104 Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

Quantum Corporation (Registrant)

November 13, 2025/s/ Laura A. Nash (Date)Laura A. Nash Chief Accounting Officer