Chemtura Corporation was a global corporation headquartered in Philadelphia, Pennsylvania, with its other principal executive office in Middlebury, Connecticut. Merged into Lanxess in 2017, the company focused on specialty chemicals for various industrial sectors, and these were transportation, energy, and electronics. Chemtura operated manufacturing plants in 11 countries. Its primary markets were industrial manufacturing customers. The corporation employed approximately 2500 people for research, manufacturing, logistics, sales and administration. Operations were located in North America, Latin America, Europe and Asia. In addition, the company had significant joint ventures primarily in the United States. For the year ended December 31, 2015, the company's global core segment revenue was $1.61 billion. Chief executive officer was Craig A. Rogerson, who was also the president and chairman of the board of Chemtura Corporation. On April 21, 2017, Chemtura was acquired by the German chemical company Lanxess.