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 August 2025

Commission File Number: 001-39258

BTC Digital Ltd.

61 Robinson Road Level 6 & 7

#738, Singapore 068893

(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 ☐

On August 5, 2025, BTC Digital Ltd. (the “Company”) issued a press release encouraging shareholders to vote at the extraordinary general meeting, which was postponed to August 22, 2025.

A copy of the press release is attached hereto as Exhibit 99.1. The press release is qualified in its entirety by reference to the full text of such exhibit.

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.

	BTC Digital Ltd.

Date: August 5, 2025	By:	/s/ Siguang Peng
	Name:	Siguang Peng
	Title:	Chief Executive Officer

EXHIBIT INDEX

Exhibit No.		Description
99.1		Press Release

BTC Digital Ltd. 6-K