Compass Minerals International Inc
Ownership
Ownership Structure
Who owns Compass Minerals International Inc (CMP)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 93.6% of the shares are freely tradable; institutional investors hold 82.4%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Koch, Inc | 16.76 | 7,034,609 | +0.0 | 06/30/2026 |
| SailingStone Capital Partners LLC | 7.98 | 3,351,366 | -30.6 | 06/30/2026 |
| BlackRock Inc | 7.33 | 3,078,473 | +7.9 | 06/30/2026 |
| State Street Corp | 5.82 | 2,441,899 | +5.1 | 06/30/2026 |
| American Century Companies Inc | 5.42 | 2,273,578 | +35.4 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.23 | 1,775,518 | +1.5 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Avantis US Small Cap Value ETF | 5.42 | 2,276,374 | +0.2 | 09/30/2026 |
| Victory Global Energy Transition A | 4.49 | 1,886,724 | -3.4 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 1,333,032 | +0.0 | 09/30/2026 |
| Stt Strt®SPDR®S&P®Mtls &MngETF | 3.16 | 1,325,268 | +1.0 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Reece Joseph E | Director | 97,372 | 2,268,768 $ | Sep 30, 2026 | direct |
| Dowling Edward C | President and CEO | 91,630 | 2,134,979 $ | Oct 15, 2026 | direct |
| Dealy Richard P | Director | 47,093 | 1,097,267 $ | Sep 30, 2026 | direct |
| Nichols Benjamin S. | Chief Commercial Officer | 20,957 | 488,298 $ | Oct 15, 2026 | direct |
| Ward Ashley | Chief Accounting Officer | 9,583 | 223,284 $ | Oct 15, 2026 | direct |
| Safran David | Director | 7,413 | 172,723 $ | Oct 9, 2026 | direct |
| Tills Amy | Chief Human Resources Officer | 5,156 | 120,135 $ | Sep 11, 2026 | direct |
| Risner Brandon | Chief Operating Officer | 3,780 | 88,074 $ | Oct 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | Ward Ashley | Chief Accounting Officer | Other | 740 | 22.59 | 16,717 |
| Oct 15, 2026 | Ward Ashley | Chief Accounting Officer | Other | 2,598 | 0.00 | – |
| Oct 15, 2026 | Dowling Edward C | President and CEO | Other | 20,097 | 22.59 | 453,991 |
| Oct 15, 2026 | Dowling Edward C | President and CEO | Other | 45,466 | 0.00 | – |
| Oct 15, 2026 | Risner Brandon | Chief Operating Officer | Other | 1,465 | 22.59 | 33,094 |
| Oct 15, 2026 | Risner Brandon | Chief Operating Officer | Other | 5,245 | 0.00 | – |
| Oct 15, 2026 | Nichols Benjamin S. | Chief Commercial Officer | Other | 1,977 | 22.59 | 44,660 |
| Oct 15, 2026 | Nichols Benjamin S. | Chief Commercial Officer | Other | 6,946 | 0.00 | – |
| Oct 9, 2026 | Safran David | Director | Other | 108 | 0.00 | – |
| Oct 9, 2026 | Safran David | Director | Other | 4,114 | 0.00 | – |
| Sep 30, 2026 | Safran David | Director | Other | 1,135 | 0.00 | – |
| Sep 30, 2026 | Dealy Richard P | Director | Other | 1,333 | 0.00 | – |
| Sep 30, 2026 | Reece Joseph E | Director | Other | 1,702 | 0.00 | – |
| Sep 11, 2026 | Tills Amy | Chief Human Resources Officer | Other | 2,142 | 24.80 | 53,122 |
| Sep 11, 2026 | Tills Amy | Chief Human Resources Officer | Other | 7,298 | 0.00 | – |
| Jul 28, 2026 | Ward Ashley | Chief Accounting Officer | Other | 2,443 | 29.69 | 72,533 |
| Jul 28, 2026 | Ward Ashley | Chief Accounting Officer | Other | 8,333 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: October 30, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.