Politan Capital Management LP - 16 Feb 2026 SCHEDULE 13D/A Report for MASIMO CORP Common Stock, par value $0.001 per share (MASI)

Key filing fact

Politan Capital Management LP disclosed 6.2% ownership in MASIMO CORP Common Stock, par value $0.001 per share (MASI) on 16 Feb 2026.

Key facts

Politan Capital Management LP filed SCHEDULE 13D/A for MASIMO CORP Common Stock, par value $0.001 per share (MASI).
Disclosed ownership: 6.2%.
Date of event: 16 Feb 2026.

This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
You can verify ownership claims directly against the original SEC filing.

Backed by Schedule 13D/13G

Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.

Reporting persons

Names, ownership, voting power, signatures, titles, and CIKs as disclosed in this Schedule 13D/G filing.

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Politan Capital Management LP	6.2%	4,586,630	0	4,586,630	/s/ Quentin Koffey	Quentin Koffey, Managing Member	0001885245
Politan Capital Management GP LLC	6.2%	4,586,630	0	4,586,630	/s/ Quentin Koffey	Quentin Koffey, Managing Member	0001984176
Politan Capital Partners GP LLC	6.2%	4,586,630	0	4,586,630	/s/ Quentin Koffey	Quentin Koffey, Managing Member	0001984175
Quentin Koffey	6.2%	4,590,873	4,243	4,586,630	/s/ Quentin Koffey	Quentin Koffey	0001984174

CIK / CUSIP context first

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