SEC Form 6-K filed by Ridgetech Inc.

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 OF THE
SECURITIES EXCHANGE ACT OF 1934

For the month of December 2025

Commission File Number: 001-40724

RIDGETECH, INC.
(Translation of registrant’s name into English)

5th Floor, Building 6, No. 100, 18th Street, Baiyang Sub-district,

Qiantang District, Hangzhou City, Zhejiang Province, People’s Republic of China, 310018
(Address of principal executive offices)

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 ☐

INCORPORATION BY REFERENCE

This report is incorporated by reference in our registration statements on Form F-3 (No. 333-291941, No. 333-259692 and No. 333-269182) and S-8 (No. 333-264505, No. 333-268809 and No. 333-277849), and shall be deemed to be a part thereof from the date on which this report is furnished to the SEC, to the extent not superseded by documents or reports subsequently filed or furnished.

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.