Tangshan Sanyou Chemical Industries (600409.SH) wholly-owned subsidiary, Sanyou Investment, increased its holdings of the company's shares by 3.42 million shares.

On November 1, 2023, Tangshan Sanyou Chemical Industries (600409.SH) issued an announcement stating that its controlling shareholder, Tangshan Sanyou Alkali Industry (Group) Co., Ltd. (referred to as "Alkali Group"), through its wholly-owned subsidiary Tangshan Sanyou Investment Co., Ltd. (referred to as "Sanyou Investment"), has increased its holdings of the company by 3.42 million shares, accounting for 0.17% of the total share capital, through centralized bidding trading.