Sigma-Aldrich Corporation, also known as Sigma or Sigma-Aldrich, is a leading American biochemical and chemical company that provides a wide range of products and services for scientific research and development. The company was founded in 1935 and is headquartered in St. Louis, Missouri.
In 2015, Sigma-Aldrich was acquired by Merck KGaA, a German pharmaceutical and chemical company, and it now operates as a subsidiary of Merck.
The stock ticker symbol for Sigma-Aldrich Corporation was SIAL. However, after the acquisition by Merck, the SIAL ticker symbol was retired and the company no longer trades as a public company.
Sigma-Aldrich Corporation, also known as Sigma or Sigma-Aldrich, is a leading American biochemical and chemical company that provides a wide range of products and services for scientific research and development. The company was founded in 1935 and is headquartered in St. Louis, Missouri.