---
schema_version: "secwatch.filing_event.v1"
accession: "0000937556-25-000151"
form_type: "8-K"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2025-09-29T23:59:59+00:00"
generated_at: "2026-05-17T05:31:02.180549+00:00"
event_type: "m_and_a"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Masimo completes sale of consumer audio business to Harman for ~$328M cash; repays $270M Term Loan

## Summary
- Sold Sound United (consumer audio) to Harman on Sept 23, 2025 for net cash ~$328M.
- Used proceeds to repay $270M Term Loan plus $1.1M accrued interest.
- Pro forma 2024 revenue would be $1.4B vs as-reported $2.1B after divestiture.
- Estimated loss on sale of $178.4M recorded in retained earnings in pro forma balance sheet.
- Pro forma 2024 net income $27.2M vs as-reported net loss of $304.9M.

## SEC filing metadata
- accession: 0000937556-25-000151
- form_type: 8-K
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2025-09-29T23:59:59+00:00
- event_type: m_and_a
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000093755625000151/0000937556-25-000151-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000093755625000151/masi-20250923.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000937556-25-000151
- JSON: https://secwatch.observer/filing/0000937556-25-000151.json
- Plain text: https://secwatch.observer/filing/0000937556-25-000151.txt

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