Masimo Expands Suite of Advanced Measurements Through Acquisition of UK-Based LiDCO Group Plc Masimo Expands Suite of Advanced Measurements Through Acquisition of UK-Based LiDCO Group Plc Masimo (NASDAQ: MASI) today announced that it has successfully completed the acquisition of the LiDCO Group Plc, a leading provider of advanced hemodynamic monitoring solutions (LiDCO). The Company completed the acquisition of 100% of LiDCO on February 2, 2021. LiDCO was founded in 1991, launched its first product in 1999, and began trading on the AIM submarket of the London Stock Exchange in 2001. On January 11, 2021, LiDCO was de-listed from AIM and will be re-registered by Masimo as a UK-based private subsidiary.