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Exhibit 21.1
Subsidiaries of the Registrant
The following are wholly-owned subsidiaries of the registrant, Masimo Corporation, a Delaware corporation:
Name of Subsidiary
State or Jurisdiction of Incorporation or Organization 
Masimo Americas, Inc.Delaware
Masimo de Mexico Holdings I LLCDelaware
Masimo de Mexico Holdings II LLCDelaware
Masimo Holdings LLCDelaware
SpO2.com, Inc.Delaware
SEDLine, Inc.Delaware
Masimo Australia Pty LtdAustralia
Masimo Öesterreich GmbHAustria
Masimo Importacao e Distribuicao de Produtos Medicos LtdaBrazil
Masimo Holdings LPCayman
Masimo (China) Medical Technology Co., Ltd.China
Masimo Europe Ltd.United Kingdom
Masimo Hong Kong LimitedHong Kong
Masimo Medical Technologies India Private LimitedIndia
Masimo Japan Kabushiki KaishaJapan
Masimo Mexico, S. de R.L. de C.V.Mexico
Masimo Canada ULCNova Scotia
Masimo Asia Pacific PTE. Ltd.Singapore
Masimo International SARLSwitzerland
Masimo International Technologies SARLSwitzerland
Masimo Medical Technologies (Spain) SLSpain
Masimo Medikal Ürünler Ticaret Limited ŞirketiTurkey
Masimo Semiconductor, Inc.Delaware
Masimo Sweden ABSweden
52 Discovery, LLCCalifornia
Masimo 25 Sagamore, LLCNew Hampshire
Masimo Korea, LLCSouth Korea
Masimo 17, LLCCalifornia
Masimo (Shanghai) Industrial Co., Ltd. China
Patient Doctor Technologies, Inc.Delaware
Alton Office Property, LLCDelaware

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Name of Subsidiary
State or Jurisdiction of Incorporation or Organization 
Alton Office Holdings, LLCDelaware
OC Property Ventures LLCDelaware
OC Property Shelter LLC Delaware
Masimo Saudi Arabia for Trading, LLCSaudi Arabia
Masimo Al-Arabia for Manufacturing
Saudi Arabia
VCCB Holdings, Inc. Delaware
TNI medical AGGermany
Masimo Technology Café LLCCalifornia
Masimo LHC, LimitedUnited Kingdom
LiDCO Group LimitedUnited Kingdom
LiDCO LimitedUnited Kingdom
LiDCO Netherlands B.V.Netherlands
Masimo Deutschland GmbH Germany
Masimo Gulf, LLCQatar
Masimo (Gulf) Medical Technologies WLL
Qatar
Masimo Medical Technologies (Malaysia) Sdn Bhd.Malaysia
Nura Holdings Pty LtdAustralia
Nura Operations Pty LtdAustralia
Shenzhen Nura Electroacoustic Technology Ltd China
Masimo Polska Spółka z ograniczoną odpowiedzialnościąPoland


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