---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-24-040915"
form_type: "8-K"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2024-05-08T23:59:59+00:00"
generated_at: "2026-06-02T15:13:46.041474+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Director Rolf Classon resigns from Masimo board for health reasons; Robert Chapek appointed to Audit Committee

## Summary
- Rolf Classon notified Board on May 3, 2024 of resignation effective May 10, 2024 for personal health reasons.
- Resignation not due to any disagreement with Masimo's operations, policies, or practices.
- Robert Chapek appointed as member of Audit Committee effective May 8, 2024.
- Classon's departure reduces Board size; no other committee changes disclosed.

## SEC filing metadata
- accession: 0001213900-24-040915
- form_type: 8-K
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2024-05-08T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000121390024040915/0001213900-24-040915-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000121390024040915/ea0205600-8k_masimo.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-24-040915
- JSON: https://secwatch.observer/filing/0001213900-24-040915.json
- Plain text: https://secwatch.observer/filing/0001213900-24-040915.txt

## Key facts
- Executive change
  Rolf Classon resigned as Director at MASIMO CORP.
  - Action: resigned
  - Role: Director
  source text: on May 3, 2024, Rolf Classon notified Masimo’s Board of Directors (the “Board”) of Mr. Classon’s decision to resign from the Board and the Audit Committee of the Board (the “Audit Committee”), effective as of May 10, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/937556/000121390024040915/0001213900-24-040915-index.htm

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