ZK International Group Co., Ltd.

Wenzhou Weijia Pipeline Development Co., Ltd. (Wenzhou Weijia) was incorporated on June 17, 2015 under the laws of the Peoples Republic of China. A wholly-owned subsidiary of ZK Pipe and a wholly foreign-owned entity under the PRC laws, Wenzhous principal activities of Wenzhou Weijia including (i) technical research, (ii) technical service and sales of metal pipe and fittings, (iii) technical service and sales of light industry machinery and (iv) equipment imports and exports of goods and technology. Wenzhou Zhengfeng Industry and Trade Co., Ltd. or formerly known as Wenzhou Zhengfeng Steel Strip Co., Ltd. (Wenzhou Zhengfeng) was incorporated on December 24, 1999 under the laws of the Peoples Republic of China. Wenzhou Zhengfengs registered and paid in capital is RMB 2,880,000. Through equity transfers, Wenzhou Zhengfeng is a wholly-owned subsidiary of Zhejiang Zhengkang and its principal activity is trading of steel strip that are mainly purchased from Zhejiang Zhengkang. xSigma Corporation (xSigma Corporation) was incorporated on January 18, 2018 under the laws of the British Virgin Islands. Xsigma Corporation is 51% owned by ZK International. xSigma Corporation does not have any material operations as of the date of this annual report. xSigma Collectibles Limited (xSigma Collectibles) was incorporated on July 6, 2021 under the laws of the British Virgin Islands. xSigma Collectibles is a wholly-owned subsidiary of ZK International. xSigma Collectibles does not have any material operations as of the date of this annual report.