---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-24-050527"
form_type: "8-K"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2024-06-07T23:59:59+00:00"
generated_at: "2026-06-01T05:46:45.404968+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Masimo corrects recall scope: 27,600 Rad-G units affected; DOJ investigation ongoing

## Summary
- Recall affects ~7,350 U.S. and ~20,250 non-U.S. Rad-G units due to unintended power state change.
- DOJ subpoena and civil investigative demand seek documents on Rad-G/Rad-97 complaints and returns.
- Statement at June 5 investor conference corrected to clarify recall unit counts.
- Company provides no estimate of resolution or financial impact from DOJ review.

## SEC filing metadata
- accession: 0001213900-24-050527
- form_type: 8-K
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2024-06-07T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000121390024050527/0001213900-24-050527-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000121390024050527/ea0207499-8k_masimo.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-24-050527
- JSON: https://secwatch.observer/filing/0001213900-24-050527.json
- Plain text: https://secwatch.observer/filing/0001213900-24-050527.txt

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