---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-324977"
form_type: "8-K"
ticker: "UTL"
cik: "0000755001"
company_name: "UNITIL CORP"
filed_at: "2025-12-18T23:59:59+00:00"
generated_at: "2026-05-16T12:50:18.988400+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Unitil Corp Corporate Secretary Whitney to retire Dec 31; Simpson succeeds Jan 1

## Summary
- Sandra L. Whitney will retire and resign as Corporate Secretary effective December 31, 2025.
- Carleton B. Simpson, currently SVP and General Counsel, will become Corporate Secretary on January 1, 2026.
- Whitney will provide consulting services until April 30, 2026 to assist with transition.
- Simpson will retain his role as Senior Vice President and General Counsel.

## SEC filing metadata
- accession: 0001193125-25-324977
- form_type: 8-K
- ticker: UTL
- cik: 0000755001
- company_name: UNITIL CORP
- filed_at: 2025-12-18T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 7.01, 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/755001/000119312525324977/0001193125-25-324977-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/755001/000119312525324977/d75514d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-324977
- JSON: https://secwatch.observer/filing/0001193125-25-324977.json
- Plain text: https://secwatch.observer/filing/0001193125-25-324977.txt

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