// company-profile
Compass Minerals International Inc
CMPExchangeNYSESectorMining & Quarrying of Nonmetallic Minerals (No Fuels)Inc.DEFilings180Insiders27
// api This Compass Minerals International Inc insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, Compass Minerals International Inc insiders bought $0 (7 transactions) and sold $13K (2 transactions).
- Most active insider: Nichols Benjamin S. with 6 transactions totaling $13K.
- Largest single sale: $7K by Nichols Benjamin S. on May 13, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Compass Minerals International Inc as of 2026-03-31
Total reported AUM
$902.7M
QoQ change
+40.6%
Reporting period
2026-03-31
#1
Koch, Inc.
CIK 2027344
$164.3M
7.0M shares
#2
SailingStone Capital Partners LLC
CIK 1608904
$112.7M
4.8M shares
#3
STATE STREET CORP
CIK 93751
$54.2M
2.3M shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 18, 2026 | Nichols Benjamin S. | CMP | Option Exercise | 685 | $0.00 | $0K |
| May 18, 2026 | Nichols Benjamin S. | CMP | Tax Withholding | 195 | $28.97 | $6K |
| May 18, 2026 | Nichols Benjamin S. | CMP | Option Exercise | 685 | $0.00 | $0K |
| May 13, 2026 | Nichols Benjamin S. | CMP | Option Exercise | 737 | $0.00 | $0K |
| May 13, 2026 | Nichols Benjamin S. | CMP | Tax Withholding | 247 | $30.21 | $7K |
45 more transactions hidden
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