---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-079156"
form_type: "8-K"
ticker: "HSIC"
cik: "0001000228"
company_name: "HENRY SCHEIN INC"
filed_at: "2023-03-24T23:59:59+00:00"
generated_at: "2026-06-17T16:06:19.388830+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Henry Schein amends By-Laws regarding advance notice, universal proxy rules, and proxy card color

## Summary
- Requires notice of nominations or business 120 to 90 days before annual meeting anniversary.
- Adds compliance requirements with universal proxy rules (Rule 14a-19) and group certification.
- Revises advance notice: stockholders must provide info within 5 days of request; nominees may be interviewed.
- Requires stockholders soliciting proxies to use a non-white proxy card.
- Includes ministerial, clarifying, and conforming changes for consistency.

## SEC filing metadata
- accession: 0001193125-23-079156
- form_type: 8-K
- ticker: HSIC
- cik: 0001000228
- company_name: HENRY SCHEIN INC
- filed_at: 2023-03-24T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1000228/000119312523079156/0001193125-23-079156-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1000228/000119312523079156/d492524d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-079156
- JSON: https://secwatch.observer/filing/0001193125-23-079156.json
- Plain text: https://secwatch.observer/filing/0001193125-23-079156.txt

## Key facts
- Governance Changes
  HENRY SCHEIN INC: Amended and restated the Third Amended and Restated By-Laws to update advance notice provisions, universal proxy rules, and other procedures (effective 2023-03-23).
  - Change: bylaw amendment
  - Effective: 2023-03-23
  source text: On March 23, 2023, the Board of Directors (the “Board”) of Henry Schein, Inc. (the “Company”) amended and restated the Company’s Third Amended and Restated By-Laws (as amended and restated, the “By-Laws”), effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1000228/000119312523079156/0001193125-23-079156-index.htm

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