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ONE GROUP HOSPITALITY, INC._March 13, 2026 0001399520false00013995202026-03-132026-03-13 ​ ​

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): March 13, 2026

THE ONE GROUP HOSPITALITY, INC.

(Exact name of registrant as specified in its charter)

Delaware ​ ​ ​ 001-37379 ​ ​ ​ 14-1961545

(State or other jurisdiction (Commission File Number) (IRS Employer

of incorporation) ​ ​ ​ Identification No.)

​ 1624 Market Street, Suite 311 Denver, Colorado 80202 (Address of principal executive offices and zip code) Registrant’s telephone number, including area code: (646) 624-2400 ​ (Former name or former address, if changed since last report) 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 (see General Instruction A.2. below): ​

​

☐ Written communication 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 communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

​ ​

☐ Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock

STKS

Nasdaq

​ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). 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 Operations and Financial Conditions. On March 13, 2026, The ONE Group Hospitality, Inc. issued a press release announcing financial results for the fourth quarter and fiscal year ended December 28, 2025. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

​ Item 9.01 Financial Statements and Exhibits. ​ (d) Exhibits. The following exhibits are being furnished or filed, as applicable, herewith: ​ 99.1Press Release dated March 13, 2026 104Cover Page Interactive Data File (embedded within the Inline XBRL document) ​ ​ ​ ​ ​ ​ ​

SIGNATURES

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. ​ ​

​

​

Dated: March 13, 2026

THE ONE GROUP HOSPITALITY, INC.

​ ​ ​

​ By: /s/ Nicole Thaung

​ Name: Nicole Thaung

​ Title: Chief Financial Officer

​ ​ ​ ​

ONE GROUP HOSPITALITY, INC._January 12, 2026 0001399520false00013995202026-01-122026-01-12 ​ ​

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 12, 2026

THE ONE GROUP HOSPITALITY, INC.

(Exact name of registrant as specified in its charter)

Delaware ​ ​ ​ 001-37379 ​ ​ ​ 14-1961545

(State or other jurisdiction (Commission File Number) (IRS Employer

of incorporation) ​ ​ ​ Identification No.)

​ 1624 Market Street, Suite 311 Denver, Colorado 80202 (Address of principal executive offices and zip code) Registrant’s telephone number, including area code: (646) 624-2400 ​ (Former name or former address, if changed since last report) 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 (see General Instruction A.2. below): ​

​

☐ Written communication 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 communication pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

​ ​

☐ Pre-commencement communication pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock

STKS

Nasdaq

​ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). 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 Operations and Financial Condition

On January 12, 2026, The ONE Group Hospitality, Inc. (the “Company” or “The ONE Group”) issued a press release announcing its preliminary fourth quarter and full year 2025 sales results. The full text of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K. ​ ​ Item 8.01 Other Events

The Company will present at the 28th Annual ICR Conference on January 13, 2026. The presentation will begin at 10:30 am Eastern Time and can be accessed from the Investor Relations tab of The ONE Group’s website at www.togrp.com. The Company has made available a copy of the updated investor presentation on the Investor Relations tab of the Company’s website at www.togrp.com. ​ ​ Item 9.01 Financial Statements and Exhibits

(d) Exhibits

99.1 Press release dated January 12, 2026

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

​ ​

​

SIGNATURES

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. ​ ​

​

​

Dated: January 12, 2026

THE ONE GROUP HOSPITALITY, INC.

​ ​ ​

​ By: /s/ Nicole Thaung

​ Name: Nicole Thaung

​ Title: Chief Financial Officer

​ ​ ​ ​