---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-045340"
form_type: "8-K/A"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2025-05-07T23:59:59+00:00"
generated_at: "2026-05-22T10:24:19.405283+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.85
calibrated_materiality_score: 0.85
confidence: "high"
source: SEC EDGAR
---

# Masimo sells consumer audio business (Sound United) to Harman for $350M cash

## Summary
- Sale of Viper Holdings (Sound United) to Harman International for base price of $350M cash, subject to working capital adjustments.
- Business includes Bowers & Wilkins, Denon, Marantz, Polk, Definitive Technology, Classe, Boston Acoustics brands.
- Transaction expected to close after regulatory approvals and customary conditions; Harman is a Samsung subsidiary.
- Masimo retains its medical technology and non-audio businesses; proceeds used for general corporate purposes.

## SEC filing metadata
- accession: 0001104659-25-045340
- form_type: 8-K/A
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2025-05-07T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.85
- calibrated_materiality_score: 0.85
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000110465925045340/0001104659-25-045340-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000110465925045340/tm2514246d1_8ka.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-045340
- JSON: https://secwatch.observer/filing/0001104659-25-045340.json
- Plain text: https://secwatch.observer/filing/0001104659-25-045340.txt

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