---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-23-236256"
form_type: "8-K"
ticker: "CBT"
cik: "0000016040"
company_name: "CABOT CORP"
filed_at: "2023-09-15T23:59:59+00:00"
generated_at: "2026-06-10T16:19:17.800466+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.4
calibrated_materiality_score: 0.4
confidence: "high"
source: SEC EDGAR
---

# Cabot elects Michelle Williams to board; Non-Executive Chair Rataj to retire May 2024

## Summary
- Michelle Williams, Ph.D., elected to board effective Sep 13, 2023, and appointed to Audit Committee.
- Sue Rataj to retire from board effective May 31, 2024; steps down as Non-Executive Chair on Oct 1, 2023.
- Michael Morrow elected Non-Executive Chair effective Oct 1, 2023; Frank Wilson elected Audit Committee Chair.
- Rataj remains Chair of Governance and Nominating and Executive Committees until retirement.
- No transactions between Williams and Cabot under Item 404(a); received prorated stock grant of ~$45,000.

## SEC filing metadata
- accession: 0001193125-23-236256
- form_type: 8-K
- ticker: CBT
- cik: 0000016040
- company_name: CABOT CORP
- filed_at: 2023-09-15T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.4
- calibrated_materiality_score: 0.4
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/16040/000119312523236256/0001193125-23-236256-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/16040/000119312523236256/d492057d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-23-236256
- JSON: https://secwatch.observer/filing/0001193125-23-236256.json
- Plain text: https://secwatch.observer/filing/0001193125-23-236256.txt

## Key facts
- Executive change
  Sue Rataj departed as director at CABOT CORP.
  - Action: retiring
  - Role: director
  source text: Sue Rataj, Non-Executive Chair of the Board, advised the Board that she would be retiring from the Board effective May 31, 2024.
  evidence_url: https://www.sec.gov/Archives/edgar/data/16040/000119312523236256/0001193125-23-236256-index.htm
- Executive change
  Michelle Williams was elected as director at CABOT CORP.
  - Action: elected
  - Role: director
  source text: elected Michelle Williams, Ph.D., as a director of Cabot and appointed Dr. Williams to the Board’s Audit Committee, both effective September 13, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/16040/000119312523236256/0001193125-23-236256-index.htm
- Executive change
  Sue Rataj changed role as Non-Executive Chair at CABOT CORP.
  - Action: stepped down
  - Role: Non-Executive Chair
  source text: Ms. Rataj will step down as Non-Executive Chair effective October 1, 2023
  evidence_url: https://www.sec.gov/Archives/edgar/data/16040/000119312523236256/0001193125-23-236256-index.htm

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