---
schema_version: "secwatch.filing_event.v1"
accession: "0001227654-23-000098"
form_type: "8-K"
ticker: "CMP"
cik: "0001227654"
company_name: "COMPASS MINERALS INTERNATIONAL INC"
filed_at: "2023-05-04T23:59:59+00:00"
generated_at: "2026-06-15T20:44:43.834152+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Compass Minerals appoints Jill Gardiner as independent director, expands board to 11

## Summary
- Board expanded from 10 to 11 directors; Gardiner appointed effective May 3, 2023.
- Gardiner is an independent director and audit committee financial expert; joins Audit and EHS&S committees.
- Bring experience from boards of Capital Power, Hochschild Mining, and former roles at Trevali, Capstone, Turquoise Hill.
- Will receive standard non-employee director compensation plus prorated equity grant of $120,000 vesting in one year.

## SEC filing metadata
- accession: 0001227654-23-000098
- form_type: 8-K
- ticker: CMP
- cik: 0001227654
- company_name: COMPASS MINERALS INTERNATIONAL INC
- filed_at: 2023-05-04T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1227654/000122765423000098/0001227654-23-000098-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1227654/000122765423000098/cmp-20230503.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001227654-23-000098
- JSON: https://secwatch.observer/filing/0001227654-23-000098.json
- Plain text: https://secwatch.observer/filing/0001227654-23-000098.txt

## Key facts
- Executive change
  Jill V. Gardiner was appointed as director at COMPASS MINERALS INTERNATIONAL INC.
  - Action: appointed
  - Role: director
  source text: Effective May 3, 2023, the Board of Directors (the “Board”) of Compass Minerals International, Inc. (the “Company”) increased the size of the Board from 10 directors to 11 directors and appointed Jill V. Gardiner as a director with a term expiring at the Company’s next annual meeting of stockholders.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1227654/000122765423000098/0001227654-23-000098-index.htm

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