Compass Minerals International, Inc.
Compass Minerals International, Inc. (CMP) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CMP · as of Sep 30, 2025
Ownership Breakdown
207
Institutional Holders
▼ 11 vs Q2
$713.62M
Total Inst. Value
▼ $27.43M vs Q2
41.96M
Shares Outstanding
freeFloat 76.71%
37.40M
13F Shares Held
▲ 270,662 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CMP largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
KOCH, INC. mining & quarrying of nonmetallic minerals (no fuels) | 7.03M | 16.81% | 16.81% | $135.06B | Nov 12, 2025 | — held |
SAILINGSTONE CAPITAL PARTNERS LLC mining & quarrying of nonmetallic minerals (no fuels) | 5.11M | 12.20% | 12.20% | $98.02B | Nov 14, 2025 | ▼ 459.1K |
BLACKROCK, INC. mining & quarrying of nonmetallic minerals (no fuels) | 4.16M | 9.95% | 9.95% | $79.96B | Nov 12, 2025 | ▼ 50.8K |
VANGUARD GROUP INC mining & quarrying of nonmetallic minerals (no fuels) | 2.78M | 6.63% | 6.63% | $53.28B | Nov 7, 2025 | ▲ 355.0K |
STATE STREET CORP mining & quarrying of nonmetallic minerals (no fuels) | 2.31M | 5.51% | 5.51% | $44.27B | Nov 14, 2025 | ▲ 262.5K |
EWING MORRIS & CO. INVESTMENT PARTNERS LTD. mining & quarrying of nonmetallic minerals (no fuels) | 1.67M | 3.99% | 3.99% | $29.04B | Nov 14, 2025 | ▲ 388.9K |
AMERICAN CENTURY COMPANIES INC mining & quarrying of nonmetallic minerals (no fuels) | 1.24M | 2.95% | 2.95% | $23.75B | Nov 12, 2025 | ▲ 320.8K |
NEWTYN MANAGEMENT, LLC mining & quarrying of nonmetallic minerals (no fuels) | 863.4K | 2.06% | 2.06% | $16.58B | Nov 14, 2025 | ▼ 413.8K |
GEODE CAPITAL MANAGEMENT, LLC mining & quarrying of nonmetallic minerals (no fuels) | 806.8K | 1.93% | 1.93% | $15.49B | Nov 12, 2025 | ▲ 1.8K |
DIMENSIONAL FUND ADVISORS LP mining & quarrying of nonmetallic minerals (no fuels) | 729.6K | 1.74% | 1.74% | $14.01B | Nov 12, 2025 | ▲ 75.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
27
Increased
+2.97M shares1
New Positions
first time holders19
Decreased
−1.64M shares0
Sold Out
fully exitedNet shares change (top 50)
+1.33M
+2.97M / −1.64M
Net new holders
+9
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CMP insider trading · insider activity
Source: SEC Form 4
0
Buy transactions
3
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Nichols Benjamin S. Chief Commercial Officer | May 18, 2026 | Tax Withhold | 195 | $28.97 | $5.6K | 14.2K | Form 4 ↗ |
Nichols Benjamin S. Chief Commercial Officer | May 13, 2026 | Tax Withhold | 247 | $30.21 | $7.5K | 13.7K | Form 4 ↗ |
Reece Joseph E director | Mar 31, 2026 | Award | 1,816 | — | — | 94.5K | Form 4 ↗ |
DEALY RICHARD P director | Mar 31, 2026 | Award | 1,259 | — | — | 44.8K | Form 4 ↗ |
Safran David director | Mar 31, 2026 | Award | 1,071 | — | — | 1.3K | Form 4 ↗ |
Reece Joseph E director | Mar 5, 2026 | Award | 9,434 | — | — | 9.4K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Compass Minerals International, Inc. (CMP) is primarily owned by institutional investors, who hold approximately 89.1% of total shares outstanding. Company insiders own approximately 23.29%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Compass Minerals International, Inc. is KOCH, INC., holding approximately 7.03 million shares — equal to 16.81% of outstanding shares — as of September 30, 2025.
A total of 207 institutional investors currently hold CMP stock, with a combined institutional value of approximately $713,624,434 as of the most recent 13F filing period.
Frequently asked questions
CMP ownershipCompass Minerals International, Inc. (CMP) is primarily owned by institutional investors, who hold approximately 89.1% of shares. The largest shareholder is KOCH, INC. with a 16.81% stake. Company insiders hold 23.29%. Data sourced from SEC Form 13F as of September 30, 2025.