[6-K] Canaan Inc. Current Report (Foreign Issuer)

Rhea-AI Filing Summary

Canaan Inc. filed a Form 6-K noting a new commercial win: the company secured a 4.5 MW mining server contract in Japan. According to Exhibit 99.1, the deployment is intended to support Japan’s power grid stability.

The notice is administrative in nature but highlights a capacity-specific engagement tied to grid-support use cases. The filing was signed by Chairman and CEO Nangeng Zhang on October 31, 2025.

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 October 2025

Commission File Number: 001-39127

Canaan Inc.

28 Ayer Rajah Crescent

#06-08

Singapore 139959

(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 x            Form 40-F ¨

EXHIBITS

Exhibit No.		Description
Exhibit 99.1		Canaan Inc. Wins 4.5 MW Mining Server Contract Supporting Japan's Power Grid Stability

SIGNATURE

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.

	Canaan Inc.
	By:	/s/ Nangeng Zhang
	Name:	Nangeng Zhang
	Title:	Chairman and Chief Executive Officer

Date: October 31, 2025

FAQ

What did Canaan (CAN) announce in this 6-K?

Canaan reported winning a 4.5 MW mining server contract in Japan supporting power grid stability, as noted in Exhibit 99.1.

What is the size of the new contract mentioned by Canaan (CAN)?

The contract is described as a 4.5 MW mining server deployment.

Where will Canaan’s new mining server project be located?

The project is in Japan and is described as supporting the country’s power grid stability.

Which exhibit contains details of the contract in Canaan’s filing?

Details are referenced in Exhibit 99.1 of the Form 6-K.

Who signed Canaan’s Form 6-K and when?

It was signed by Nangeng Zhang, Chairman and CEO, on October 31, 2025.

What form did Canaan use to report this information?

Canaan used a Form 6-K to report this information as a foreign private issuer.