Active Control Experts, Inc., a subsidiary of ASML Holding NV, is an American company located in Cambridge, MA, that develops, manufactures, and markets hardware, software, and firmware solutions for vibration and motion control. The firm was founded by Mark E. Lundstrom, Edward F. Crawley and Kenneth B. Lazarus. Cymer, Inc., a subsidiary of ASML Holding NV since May 2013, acquired Active Control Experts, Inc. on February 14, 2001 for $25.50 million.