---
schema_version: "secwatch.filing_event.v1"
accession: "0000927653-23-000023"
form_type: "8-K"
ticker: "MCK"
cik: "0000927653"
company_name: "MCKESSON CORP"
filed_at: "2023-04-28T23:59:59+00:00"
generated_at: "2026-06-16T07:34:47.633592+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# McKesson board adopts bylaw amendments tightening stockholder proposal and nomination rules

## Summary
- Stockholders must maintain ownership through meeting date; special meeting requests require record-date holder status and compliance with Rule 14a-19.
- Board gains ability to postpone, reschedule, or cancel previously scheduled stockholder meetings at any time.
- Additional disclosure required: text of proposals, participants in solicitation, costs borne, and certification of compliance with securities laws.
- Indemnification claims: 60-day waiting period before suit (20-day for advancement); advancement clarified for investigation-related expenses.
- Amendments conform to DGCL updates on remote meetings, stockholder list, board emergency powers, and uncertificated shares.

## SEC filing metadata
- accession: 0000927653-23-000023
- form_type: 8-K
- ticker: MCK
- cik: 0000927653
- company_name: MCKESSON CORP
- filed_at: 2023-04-28T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/927653/000092765323000023/0000927653-23-000023-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/927653/000092765323000023/mck-20230426.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000927653-23-000023
- JSON: https://secwatch.observer/filing/0000927653-23-000023.json
- Plain text: https://secwatch.observer/filing/0000927653-23-000023.txt

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