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 2025

Commission file number 001-40024

MicroAlgo Inc.

(Registrant’s Name)

Unit 507, Building C, Taoyuan Street,

Long Jing High and New Technology Jingu Pioneer Park,

Nanshan District, Shenzhen, People’s Republic of China, 518052

(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 ☐

EXPLANATORY NOTE

This Report on Form 6-K is our Unaudited Interim Financial Report for the six months ended June 30, 2025.

The information contained in this Report on Form 6-K is hereby incorporated by reference into the Company’s registration statement on Form F-3 (Registration Number 333-283522) which was filed with the U.S. Securities and Exchange Commission (the “Commission”) on November 29, 2024, and into each prospectus outstanding under the foregoing registration statement, to the extent not superseded by documents or reports subsequently filed or furnished by the Company under the Securities Act of 1933, or the Securities Exchange Act of 1934.

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EXHIBIT INDEX

Exhibit No. |  | Description
99.1 |  | Unaudited Interim Condensed Consolidated Financial Statements as of June 30, 2025 and December 31, 2024 and for the Six Months Ended June 30, 2025 and 2024
99.2 |  | Management’s Discussion and Analysis of Financial Condition and Results of Operation for The First Half of 2025
101.INS |  | XBRL Instance Document
101.SCH |  | XBRL Taxonomy Extension Schema Document
101.CAL |  | XBRL Taxonomy Extension Calculation Linkbase Document
101.DEF |  | XBRL Taxonomy Extension Definition Linkbase Document
101.LAB |  | XBRL Taxonomy Extension Label Linkbase Document
101.PRE |  | Inline XBRL Taxonomy Extension Presentation Linkbase Document
104 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document)

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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.

| MicroAlgo Inc.
| /s/ Min Shu
| Min Shu
| Chief Executive Officer

Date: September 10, 2025

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