In March 2012, the firm was sold to Masimo Semiconductor Inc., a wholly-owned subsidiary of Masimo Corporation. Spire Semiconductor had specialized in wafer epitaxy, foundry services, and device fabrication for the defense, biomedical, telecommunications and consumer products markets. The company has extensive experience in compound semiconductor epitaxy and device processing. Spire Semiconductor had been a division of the longtime SBIR-involved company Spire Corporation. Bedford MA