---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-084068"
form_type: "8-K"
ticker: "COR"
cik: "0001140859"
company_name: "Cencora, Inc."
filed_at: "2025-08-27T23:59:59+00:00"
generated_at: "2026-05-17T09:37:52.525047+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Cencora appoints D. Mark Durcan as Chairman effective Oct 1, 2025; Steven H. Collis retires

## Summary
- D. Mark Durcan named Chairman of the Board, effective October 1, 2025, succeeding Steven H. Collis.
- Collis retires as Executive Chairman and director at end of fiscal year September 30, 2025; no disagreement cited.
- Board size reduces from 11 to 10 directors upon Collis's retirement.
- Durcan has been a director since 2015 and Lead Independent Director since March 2023; former CEO of Micron Technology.

## SEC filing metadata
- accession: 0001104659-25-084068
- form_type: 8-K
- ticker: COR
- cik: 0001140859
- company_name: Cencora, Inc.
- filed_at: 2025-08-27T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1140859/000110465925084068/0001104659-25-084068-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1140859/000110465925084068/tm2523923d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-084068
- JSON: https://secwatch.observer/filing/0001104659-25-084068.json
- Plain text: https://secwatch.observer/filing/0001104659-25-084068.txt

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