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: 001-38146

ZK INTERNATIONAL GROUP CO., LTD.

(Exact name of registrant as specified in its charter)

c/o Zhejiang Zhengkang Industrial Co., Ltd.

No. 678 Dingxiang Road, Binhai Industrial Park

Economic & Technology Development Zone

Wenzhou, Zhejiang Province,

People’s Republic of China 325025

~~Tel:~~(Address ~~+86-577-86852999~~of principal executive office)

~~(Address~~Indicate ~~and~~by ~~telephone~~check ~~number~~mark ofwhether the registrant’s files or will file annual ~~principal~~reports ~~executive~~under ~~offices)~~cover of Form 20-F or Form 40-F:

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 ☐

~~Closing~~On ofMarch a26, ~~Private~~2026, ~~Placement~~ZK ~~Transaction~~International Group Co., Ltd. (the “Registrant” or the “Company”) held its 2026 Extraordinary General Meeting of Shareholders (the “Meeting”).

AsAt ~~previously~~the ~~disclosed~~Meeting, in the ~~Form~~shareholders ~~6-K~~voted ~~dated~~to approve ~~February~~(1) ~~27,~~the ~~2026~~proposed sale (the “Transaction”) of the Company’s subsidiaries, ZK ~~INTERNATIONAL~~Pipe ~~GROUP~~Industry COCo., ~~LTD~~Ltd., (a company incorporated under the ~~“Company”)~~laws ~~entered~~of ~~into~~Hong ~~certain~~Kong, ~~securities~~Wenzhou ~~purchase~~Weijia Pipeline Development Co., Ltd., a company incorporated under the laws of the People’s ~~agreement~~Republic of China (the “~~SPA~~PRC”), ~~with~~Zhejiang ~~certain~~Zhengkang ~~non-U~~Industrial Co.S Ltd., ~~investors~~a ~~(collectively,~~company incorporated under the ~~“Purchasers”)~~laws ~~pursuant~~of the PRC, Wenzhou toZhengfeng ~~which~~Industry ~~the~~and ~~Company~~Trade ~~agreed~~Co. toLtd., ~~sell~~a tocompany ~~the~~incorporated ~~Purchasers~~under anthe ~~aggregate~~laws of 40the PRC,~~040,000~~ ~~ordinary~~Wenzhou ~~shares~~Suona Piping Limited, noa ~~par~~company ~~value~~incorporated under ~~per~~the ~~share~~laws (of the ~~“Ordinary Shares”)~~PRC, XSigma Corporation, a company incorporated under the laws of the ~~Company~~British atVirgin Islands, xSigma Trading, LLC, a ~~price~~Delaware oflimited ~~US$0.50~~liability ~~per~~company, ~~share~~and toZK ~~purchase~~International anUganda ~~aggregate~~Limited, a company incorporated under the laws of 40the Republic of Uganda,~~040~~ to PIONEER INVESTMENT MANAGEMENT LTD.,~~000~~ ~~Ordinary~~a ~~Shares~~U.S. company, in exchange for ~~the~~a ~~aggregate purchase~~cash ~~price~~consideration of ~~approximately US~~$2021,~~020~~000,000 (the “Resolution 1”), and ~~which~~(2) ~~purchase~~the ~~price~~proposal ~~should~~that conditional upon the passing of Resolution 1, (a) a general mandate be ~~paid~~and byis hereby granted to the ~~Purchasers~~board inof directors ~~US$~~of ~~fiat~~the ~~money~~Company or(the “Board”) to exercise absolute discretion, in ~~cryptocurrencies~~determining, negotiating and finalizing all specific interms, conditions and arrangements related to the Transaction, as the Board deems fit; and (b) if and when deemed advisable by the Board in its sole discretion, any director or officer of the company be authorized, for and on behalf of the Company, (to execute all definitive agreements related to the ~~“Offering”)~~Transaction and take all such other acts and things and execute all such documents necessary or desirable to implement the Transaction.

Upon satisfying all closing conditions, as of the date of this Form 6-K, the Offering has been consummated by the Company, and the Company has completed the private placement closing and issued an aggregate of 40,040,000 Ordinary Shares to the Purchasers. The form of the SPA was furnished as Exhibit 99.1 to the Form 6-K dated March 02, 2026.

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.

Dated: March 19, 2026

Date: March 26, 2026	ZK International Group Co., Ltd..

	By:	/s/ Ruihong Ma
		Ruihong Ma
		Chief Executive Officer

ZK INTERNATIONAL GROUP CO., LTD. By: /s/ Ruihong Ma Name: Ruihong Ma Title: Chief Executive Officer

Filing Compare · ZK International Group Co., Ltd.