Masimo Acquires Sound United

Danaher Completes Acquisition of Masimo Corporation

February 17, 2026

Healthcare Services

Danaher has completed its acquisition of Masimo Corporation, a specialty diagnostics provider focused on pulse oximetry and patient monitoring solutions primarily used in acute care settings. Masimo will become a wholly-owned subsidiary of Danaher and continue operating under the Masimo brand as a stand-alone operating company within Danaher’s Diagnostics segment.

HARMAN (Samsung) Completes Acquisition of Sound United from Masimo

September 23, 2025

Consumer Products

HARMAN International, a subsidiary of Samsung Electronics, has completed the acquisition of Sound United, the former consumer audio business of Masimo Corporation. The deal transfers Sound United's portfolio of premium audio brands — including Bowers & Wilkins, Denon, Marantz, Polk Audio, HEOS, Classé, Definitive Technology and Boston Acoustics — to HARMAN, expanding its product offerings across home, personal and automotive audio; media reports value the transaction at approximately $350 million.

Sonos Acquires Mayht Holding BV

April 11, 2022

Manufacturing

Sonos, Inc. acquired Netherlands-based Mayht Holding BV, a developer of a novel audio transducer technology, for approximately $100 million in cash. The acquisition brings Mayht's people, technology and IP into Sonos to accelerate product roadmap and enable smaller, lighter speaker form factors without sacrificing audio quality.

Medtronic Acquires SonarMed

May 10, 2021

Medical Devices

Medtronic plc acquired SonarMed, a Purdue‑bred developer of the SonarMed airway monitoring system, in December 2020. The acquisition adds continuous acoustic airway monitoring technology for neonatal and pediatric ventilation to Medtronic's respiratory/medical surgical portfolio to help detect endotracheal tube obstruction and position in real time.

Masimo Acquires LiDCO Group Plc

February 2, 2021

Medical Devices

Masimo has completed the acquisition of 100% of UK-based LiDCO Group Plc, adding LiDCO's advanced hemodynamic monitoring products to Masimo's portfolio. LiDCO will be re-registered as a UK-based private subsidiary, strengthening Masimo's monitoring capabilities and expanding its suite of patient measurement technologies.

Sound United Acquires Bowers & Wilkins

October 9, 2020

Consumer Products

Sound United LLC has finalized the acquisition of Bowers & Wilkins, the British designer and manufacturer of premium loudspeakers, headphones, and branded automotive/TV audio systems. Sound United — itself a portfolio company of Charlesbank Capital Partners — will integrate Bowers & Wilkins into its portfolio to leverage scale, engineering expertise, and distribution to expand product development and consumer reach.