---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-000204"
form_type: "8-K"
ticker: "MTB"
cik: "0000036270"
company_name: "M&T BANK CORP"
filed_at: "2023-01-03T23:59:59+00:00"
generated_at: "2026-06-20T21:06:42.288210+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# M&T Bank director Calvin Butler Jr. resigns from board to become Exelon CEO

## Summary
- Calvin G. Butler, Jr. stepped down from M&T's board effective Dec. 31, 2022.
- Butler was named President and CEO of Exelon, effective Dec. 31, 2022.
- He served on M&T's board since 2020; no replacement announced.

## SEC filing metadata
- accession: 0001193125-23-000204
- form_type: 8-K
- ticker: MTB
- cik: 0000036270
- company_name: M&T BANK CORP
- filed_at: 2023-01-03T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/36270/000119312523000204/0001193125-23-000204-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/36270/000119312523000204/d432287d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-000204
- JSON: https://secwatch.observer/filing/0001193125-23-000204.json
- Plain text: https://secwatch.observer/filing/0001193125-23-000204.txt

## Key facts
- Executive change
  Calvin G. Butler, Jr. departed as Director at M&T BANK CORP.
  - Action: stepped down
  - Role: Director
  source text: In order to focus on his new role, Mr. Butler delivered notice to M&T Bank Corporation (“M&T”) on December 30, 2022, that he will be stepping down from the M&T Board of Directors effective as of December 31, 2022.
  evidence_url: https://www.sec.gov/Archives/edgar/data/36270/000119312523000204/0001193125-23-000204-index.htm

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