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 April 2026

Commission File Number: 001-42898

One and one Green Technologies. INC

(Translation of registrant’s name into English)

1^st 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 ☐

Attached as Exhibit 99.1 is the registrant’s press release dated April 22, 2026, entitled, “One and One Green Technologies. INC to Report Fiscal Year 2025 Financial Results and Hold Earnings Call on April 28, 2026.”

EXHIBITS INDEX

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.