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 March 2026

Commission File Number: 001-43046

Green Circle Decarbonize Technology Limited

(Registrant’s Name)

Green Circle Decarbonize Technology Limited

Unit 1809, Prosperity Place, 6 Shing Yip St.

Kwun Tong, Kowloon, Hong Kong

(Address of Principal Executive Offices)

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

Form 20-F ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

On March 9, 2026, Green Circle Decarbonize Technology Limited, a Cayman Islands exempted company (the “Company”), issued a press release which announced that the Company had become aware of unusual trading activity in its ordinary shares on the NYSE American. The press release constitutes a “no-news” statement pursuant to Section 401(d) of the NYSE American Company Guide and is incorporated by reference herein. 

Exhibits.

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.