---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-015904"
form_type: "8-K"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2026-02-17T23:59:59+00:00"
generated_at: "2026-05-16T02:40:45.634138+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 1.0
calibrated_materiality_score: 1.0
confidence: "high"
source: SEC EDGAR
---

# Danaher to acquire Masimo for $180/share cash; total value $9.9B

## Summary
- Masimo shareholders to receive $180.00 per share in cash for each share held.
- Total enterprise value of $9.9 billion; transaction unanimously approved by both boards.
- Masimo to operate as a standalone business unit within Danaher's Diagnostics segment.
- Politan Capital Management, holding significant Masimo shares, agreed to vote in favor.
- Closing expected in H2 2026, subject to regulatory approvals and shareholder vote.

## SEC filing metadata
- accession: 0001104659-26-015904
- form_type: 8-K
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2026-02-17T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 1.0
- calibrated_materiality_score: 1.0
- confidence: high
- sec_items: 1.01, 7.01, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000110465926015904/0001104659-26-015904-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000110465926015904/tm266533d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-015904
- JSON: https://secwatch.observer/filing/0001104659-26-015904.json
- Plain text: https://secwatch.observer/filing/0001104659-26-015904.txt

## Key facts
- Material Agreements
  MASIMO CORP entered into Voting and Support Agreement with Politan Capital Management LP (effective 2026-02-16).
  - Action: entry
  - Counterparty: Politan Capital Management LP
  - Effective: 2026-02-16
  source text: (ii) a Voting and Support Agreement (the “ Voting Agreement ”), with Parent, Merger Sub and Politan Capital Management LP (“ Politan ”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/937556/000110465926015904/0001104659-26-015904-index.htm
- Material Agreements
  MASIMO CORP entered into Agreement and Plan of Merger with Danaher Corporation and Mobius Merger Sub, Inc. valued at $180.00 in cash, without interest (effective 2026-02-16).
  - Action: entry
  - Agreement: merger
  - Counterparty: Danaher Corporation and Mobius Merger Sub, Inc.
  - Value: $180.00 in cash, without interest
  - Effective: 2026-02-16
  source text: On February 16, 2026, Masimo Corporation (the “ Company ”) entered into (i) an Agreement and Plan of Merger (the “ Merger Agreement ”) with Danaher Corporation, a Delaware corporation (“ Parent ”), and Mobius Merger Sub, Inc., a Delaware corporation and wholly owned subsidiary of Parent (“ Merger Sub ”)
  evidence_url: https://www.sec.gov/Archives/edgar/data/937556/000110465926015904/0001104659-26-015904-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.