- August 17, 1995: Ti?n thân là Doanh nghi?p Nhà nu?c Công ty Ch? L?ng Son du?c thành l?p theo Quy?t d?nh s? 656 QÐ/UB-KT c?a UBND t?nh L?ng Son;
- June 16, 2004: UBND t?nh L?ng Son ban hành Quy?t d?nh s? 925/QÐ/UB-KT v? vi?c phuong án c? ph?n hóa Công ty Ch? L?ng Son thành Công ty C? ph?n Ch? L?ng Son;
- October 20, 2004: Put into operation under the model of a joint stock companu with a charter capital of VND23,378,800,000 under the business registration certificate No.4900102530 issued for the first time by Lang Son Department of Planning and Investment;
- June 2007: Decreased the charter capital to VND22,885,400,000;
- October 04, 2007: Became a public company;
- July 14, 2020: Traded on the UPCOM market;
