As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

 5/10/24‡ Politan Capital Management LP     DFAN14A      5/9/24    1:37K  Masimo Corp.                      Toppan Merrill/FA        
  5/9/24  Politan Capital Management LP     SC 13D/A               2:80K  Masimo Corp.                      Toppan Merrill/FA        
          Politan Capital Management GP LLC³
          Politan Capital Partners GP LLC³
          Quentin Koffey³
  5/9/24  Masimo Corp.                      DEFA14A                1:38K                                    EdgarAgents LLC/FA       
  5/8/24  Politan Capital Management LP     SC 13D/A               2:86K  Masimo Corp.                      Toppan Merrill/FA        
          Politan Capital Management GP LLC³
          Politan Capital Partners GP LLC³
          Quentin Koffey³
  5/8/24  Masimo Corp.                      8-K:5,9      5/3/24   10:194K                                   EdgarAgents LLC/FA       
  5/7/24  Masimo Corp.                      10-Q        3/30/24  116:11M                                                             
  5/7/24  Masimo Corp.                      8-K:2,7,9    5/7/24   13:4.2M                                                            
  5/3/24  Reynolds Craig B                  4          Director²   1:6K   Masimo Corp.                      Masimo Corp.             
 4/30/24  Reynolds Craig B                  4          Director²   1:7K   Masimo Corp.                      Masimo Corp.             
 4/29/24  Masimo Corp.                      10-K/A     12/30/23   13:2.5M                                                            
 4/26/24  Reynolds Craig B                  144                    1:4K   Masimo Corp.                      Schwab Stock Pl… Svcs/FA 
  4/2/24‡ Masimo Corp.                      DEFA14A                1:34K                                    EdgarAgents LLC/FA       
  4/1/24  Masimo Corp.                      DEFA14A                1:89K                                    EdgarAgents LLC/FA       
 3/27/24  Politan Capital Management LP     SC 13D/A               2:135K Masimo Corp.                      Toppan Merrill/FA        
          Politan Capital Management GP LLC³
          Politan Capital Partners GP LLC³
          Quentin Koffey³
 3/25/24  Politan Capital Management LP     DFAN14A                1:33K  Masimo Corp.                      Toppan Merrill/FA        
 3/22/24  Masimo Corp.                      8-K:7,9     3/22/24   11:268K                                   Toppan Merrill/FA        
  3/1/24  Tripodi Blair                     4          Officer²    1:6K   Masimo Corp.                      Toppan Merrill/FA        
  3/1/24  Muhsin Bilal                      4          Officer²    1:9K   Masimo Corp.                      Toppan Merrill/FA        
  3/1/24  Levy Tao                          4          Officer²    1:9K   Masimo Corp.                      Toppan Merrill/FA        
  3/1/24  Young Micah W                     4          Officer²    1:9K   Masimo Corp.                      Toppan Merrill/FA        

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	4	Statement of Changes in Beneficial Ownership of Securities by an Insider — Form 4 { The Filer is an Insider² of the Issuer }.
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-K	Annual Report — Form 10-K.
	10-Q	Quarterly Report — Form 10-Q.
	144	Notice of a Proposed Sale of Securities by an Insider — Form 144 { The Filer is an Insider² of the Issuer }.
	DEFA14A	Definitive Additional Proxy Soliciting Material — Schedule 14A.
	DFAN14A	Definitive Additional Non-Management Proxy Soliciting Material — Schedule 14A.
	SC 13D	Statement of Acquisition of Beneficial Ownership by an “Active” Investor — Schedule 13D.
	/A	Amendment to, or Amended version of, a previous Filing of this Type.
²	Insider:  The Filer is a Director, Officer, 10% Owner and/or Other “insider” of the Issuer.
³	Group Member:  A Registrant or non-Registrant party to this Filing made by a Group.