---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-122646"
form_type: "8-K"
ticker: "CMP"
cik: "0001227654"
company_name: "COMPASS MINERALS INTERNATIONAL INC"
filed_at: "2025-12-19T23:59:59+00:00"
generated_at: "2026-05-16T12:31:41.962620+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Compass Minerals adds 4 directors, expands board to 12, creates CAT committee

## Summary
- Appointed Russell Ball (Mining), Denise Merle (Weyerhaeuser), Mark Roberts (ex-Morton Salt CEO), David Safran (Innovative Surface Solutions) to board, effective Dec 18, 2025.
- Ball will chair Audit Committee after 2026 annual meeting; Roberts will chair EHS&S Committee; Safran not independent due to $3.17M in prior salt-treatment purchases.
- Board expanded from 8 to 12; Koch-appointed directors Vance Holtzman and Shane Wagnon not standing for reelection at 2026 annual meeting; Lori Walker also departing.
- Chair Joe Reece to stand for reelection in 2026, then transition off board; board expected to shrink to 8 by 2027 annual meeting.
- Created new Capital Allocation and Technical Committee to support back-to-basics strategy on core Salt and Plant Nutrition businesses.

## SEC filing metadata
- accession: 0001104659-25-122646
- form_type: 8-K
- ticker: CMP
- cik: 0001227654
- company_name: COMPASS MINERALS INTERNATIONAL INC
- filed_at: 2025-12-19T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1227654/000110465925122646/0001104659-25-122646-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1227654/000110465925122646/tm2533931d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-122646
- JSON: https://secwatch.observer/filing/0001104659-25-122646.json
- Plain text: https://secwatch.observer/filing/0001104659-25-122646.txt

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