UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of September 2026

Commission File Number: 001-42898

One and one Green Technologies. INC
(Translation of registrant’s name into English)

1st Diliman
San Rafael Bulacan, Philippines, 3008
(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

One and one Green Technologies. INC, a Cayman Islands company (the “Company”) is hereby furnishing this report on Form 6-K (the “Report”) to provide the Unaudited Interim Condensed Consolidated Financial Statements of the Company as of and for the six months ended June 30, 2026, included as Exhibit 99.1 of this Report, and the Management’s Discussion and Analysis of Financial Condition and Results of Operations as of and for the six months ended June 30, 2026, included as Exhibit 99.2 of this Report.

EXHIBIT INDEX

Exhibit No. Description
99.1 Unaudited Interim Condensed Consolidated Financial Statements for the Six Months Ended June 30, 2026
99.2 Management’s Discussion and Analysis of Financial Condition and Results of Operations for the Six Months Ended June 30, 2026
99.3 Press Release – One and One Green Technologies Reports First Half 2026 Results
101.INS Inline XBRL Instance Document.
101.SCH Inline XBRL Taxonomy Extension Schema Document.
101.CAL Inline XBRL Taxonomy Extension Calculation Linkbase Document.
101.DEF Inline XBRL Taxonomy Extension Definition Linkbase Document.
101.LAB Inline XBRL Taxonomy Extension Label Linkbase Document.
101.PRE Inline XBRL Taxonomy Extension Presentation Linkbase Document.
104 Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).

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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, thereunto duly authorized.

Date: September 29, 2026 One and one Green Technologies. INC
By: /s/ Caifen Yan
Name: Caifen Yan
Title: Chief Executive Officer, Chair of the Board and Director

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