---
schema_version: "secwatch.filing_event.v1"
accession: "0000937556-23-000050"
form_type: "8-K"
ticker: "MASI"
cik: "0000937556"
company_name: "MASIMO CORP"
filed_at: "2023-04-20T23:59:59+00:00"
generated_at: "2026-06-16T23:14:30.460150+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Masimo extends deadline for stockholder proposals and director nominations to May 1, 2023

## Summary
- Board approved bylaw amendment extending submission deadline by one week.
- New deadline: May 1, 2023, 6:00 p.m. local time in Wilmington, DE.
- Only proposals and nominations received by the new deadline will be considered.

## SEC filing metadata
- accession: 0000937556-23-000050
- form_type: 8-K
- ticker: MASI
- cik: 0000937556
- company_name: MASIMO CORP
- filed_at: 2023-04-20T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/937556/000093755623000050/0000937556-23-000050-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/937556/000093755623000050/masi-20230420.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000937556-23-000050
- JSON: https://secwatch.observer/filing/0000937556-23-000050.json
- Plain text: https://secwatch.observer/filing/0000937556-23-000050.txt

## Key facts
- Governance Changes
  MASIMO CORP: Masimo Corp amended its Fifth Amended and Restated Bylaws to extend the deadline for stockholders to give notice of director nominations and submit proposals for the 2023 Annual Meeting from April 24, 2023 to May 1, 2023 (effective 2023-04-20).
  - Change: bylaw amendment
  - Effective: 2023-04-20
  source text: On April 20, 2023, the Board of Directors (the “Board”) of Masimo Corporation, a Delaware corporation (the “Corporation”) approved and adopted an amendment to the Corporation’s Fifth Amended and Restated Bylaws (the “Amendment”), which extends the deadline for stockholders to give notice of their intention to nominate directors to stand for election and to submit stockholder proposals for consideration at the 2023 Annual Meeting of Stockholders, from 6:00 p.m. local time in Wilmington, Delaware on April 24, 2023 to 6:00 p.m. local time in Wilmington, Delaware on May 1, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/937556/000093755623000050/0000937556-23-000050-index.htm

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