---
schema_version: "secwatch.filing_event.v1"
accession: "0001868275-25-000078"
form_type: "8-K"
ticker: "CEG"
cik: "0001868275"
company_name: "Constellation Energy Corp"
filed_at: "2025-09-29T23:59:59+00:00"
generated_at: "2026-05-17T05:26:56.048505+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Constellation appoints former Williams CEO Alan Armstrong to board effective Jan. 1, 2026

## Summary
- Board expanded to 13 members; Armstrong elected as director effective January 1, 2026.
- Armstrong is executive chairman of Williams, former CEO for 14 years, with 40 years of industry experience.
- Appointment brings natural gas expertise; referenced as valuable for integration of Calpine deal.
- Armstrong will receive Constellation's standard director compensation; committee assignments pending.

## SEC filing metadata
- accession: 0001868275-25-000078
- form_type: 8-K
- ticker: CEG
- cik: 0001868275
- company_name: Constellation Energy Corp
- filed_at: 2025-09-29T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1868275/000186827525000078/0001868275-25-000078-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1868275/000186827525000078/ceg-20250923.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001868275-25-000078
- JSON: https://secwatch.observer/filing/0001868275-25-000078.json
- Plain text: https://secwatch.observer/filing/0001868275-25-000078.txt

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