Compass Minerals International, Inc. (CMP) Ownership
CMP ownership summary
as of October 18, 2026- Institutions
- 78.5% of shares outstanding
- Insiders
- 23.26% of shares outstanding
- Shares outstanding
- 42.0M
- Float
- 39.3M shares available to trade
- Short interest
- 5.61% 1.7M shares short
- Days to cover
- 4.25 short interest down 20.9% vs prior month
- Institutions 78.52%
- Insiders 23.26%
CMP top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Koch, Inc | 16.76% | 7.0M | $156.6M | — | June 30, 2026 |
| 2 | SailingStone Capital Partners LLC | 7.98% | 3.4M | $74.6M | −1.5M (−30.6%) | June 30, 2026 |
| 3 | BlackRock Inc | 7.33% | 3.1M | $68.5M | +225,710 (+7.9%) | June 30, 2026 |
| 4 | State Street Corp | 5.82% | 2.4M | $54.4M | +119,423 (+5.1%) | June 30, 2026 |
| 5 | American Century Companies Inc | 5.42% | 2.3M | $50.6M | +594,903 (+35.4%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 4.23% | 1.8M | $39.5M | +26,963 (+1.5%) | June 30, 2026 |
| 7 | Irenic Capital Management LP | 2.54% | 1.1M | $23.8M | −367,151 (−25.6%) | June 30, 2026 |
| 8 | Dimensional Fund Advisors, Inc. | 2.27% | 951K | $21.2M | +37,468 (+4.1%) | June 30, 2026 |
| 9 | Jacobs Levy Equity Management, Inc. | 2.11% | 886K | $19.7M | +886,009 (0.0%) | June 30, 2026 |
| 10 | Gumshoe Capital Management LLC | 2.08% | 872K | $19.4M | −392,535 (−31.0%) | June 30, 2026 |
| 11 | Geode Capital Management, LLC | 2.00% | 841K | $18.7M | +56,275 (+7.2%) | June 30, 2026 |
| 12 | Vanguard Portfolio Management, LLC | 1.66% | 698K | $15.5M | +126,843 (+22.2%) | June 30, 2026 |
| 13 | O'Keefe Stevens Advisory, Inc. | 1.57% | 657K | $14.6M | +25,889 (+4.1%) | September 30, 2026 |
| 14 | Charles Schwab Investment Management Inc | 1.56% | 656K | $14.6M | −48,832 (−6.9%) | June 30, 2026 |
| 15 | AQR Capital Management LLC | 1.52% | 637K | $14.2M | +568,222 (+822.1%) | June 30, 2026 |
| 16 | Engine Capital Management LP | 1.51% | 633K | $14.1M | −806,044 (−56.0%) | June 30, 2026 |
| 17 | Newtyn Management LLC | 1.51% | 632K | $14.1M | −137,674 (−17.9%) | June 30, 2026 |
| 18 | Lee Danner & Bass Inc | 1.38% | 581K | $12.9M | −25,000 (−4.1%) | June 30, 2026 |
| 19 | Federated Hermes Inc | 1.37% | 575K | $12.8M | +36,134 (+6.7%) | June 30, 2026 |
| 20 | Ewing Morris & Co Investment Partners Ltd | 1.36% | 571K | $12.7M | −1.4M (−71.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 2.7M shares and 8 cut 4.7M.
CMP top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Avantis US Small Cap Value ETF | 5.42% | 2.3M | $50.7M | +3,528 (+0.2%) | September 30, 2026 |
| 2 | Victory Global Energy Transition A | 4.65% | 2.0M | $43.5M | −690,534 (−26.1%) | June 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 1.3M | $29.7M | — | August 31, 2026 |
| 4 | Stt Strt®SPDR®S&P®Mtls &MngETF | 3.16% | 1.3M | $29.5M | +13,408 (+1.0%) | September 30, 2026 |
| 5 | iShares Russell 2000 ETF | 1.96% | 824K | $18.3M | −9,472 (−1.1%) | September 30, 2026 |
| 6 | Lightrock Global Small-Cap R EUR Acc | 1.22% | 510K | $11.4M | −13,858 (−2.6%) | June 30, 2026 |
| 7 | Fidelity Small Cap Index | 0.83% | 349K | $7.8M | +2,632 (+0.8%) | July 31, 2026 |
| 8 | Hennessy Cornerstone Growth Investor | 0.75% | 315K | $7.0M | −30,800 (−8.9%) | September 30, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.71% | 298K | $6.6M | −377 (−0.1%) | September 30, 2026 |
| 10 | Columbia Small Cap Value Discv A | 0.67% | 281K | $6.3M | +1,800 (+0.6%) | August 31, 2026 |
| 11 | Schwab Fundamental U.S. Small CompanyETF | 0.57% | 238K | $5.3M | +336 (+0.1%) | September 30, 2026 |
| 12 | Nuveen Quant Small/Mid Cap Eq R6 | 0.45% | 191K | $4.2M | — | August 31, 2026 |
| 13 | Bridge Builder Small/Mid Cap Value | 0.45% | 188K | $4.2M | +184,375 (+5,821.8%) | September 30, 2026 |
| 14 | Vanguard Russell 2000 ETF | 0.44% | 187K | $4.2M | +2,233 (+1.2%) | September 30, 2026 |
| 15 | Schwab US Small-Cap ETF™ | 0.44% | 184K | $4.1M | +117 (+0.1%) | September 30, 2026 |
| 16 | Federated Hermes MDT Small Cap Core IS | 0.43% | 179K | $4.0M | — | June 30, 2026 |
| 17 | DFA US Small Cap I | 0.42% | 178K | $4.0M | — | August 31, 2026 |
| 18 | CREF Total Global Stock Account R3 | 0.37% | 155K | $3.4M | — | August 31, 2026 |
| 19 | Fidelity Extended Market Index | 0.34% | 143K | $3.2M | −770 (−0.5%) | August 31, 2026 |
| 20 | Vanguard Strategic Small-Cap Equity Inv | 0.34% | 141K | $3.1M | +33,643 (+31.4%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CMP insider transactions
latest 3| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2024-01-22 | Joseph E Reece | Buy | $21.24 | 5,000 | $106,200 |
| 2023-10-11 | Kevin Hern | Sell | $27.56 | — | — |
| 2023-09-21 | James D Standen | Buy | $26.85 | 3,503 | $94,056 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
CMP shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CMP
Institutional investors own 78.5% of Compass Minerals International's shares and insiders 23.26%. The largest holder is Koch, Inc with 16.76% of the shares (7.0M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 8 reduced their stake in the latest filings. Short interest is 5.61% of the float, or 4.25 days of average trading volume. The share count rose 25.7% since 2014.
Related: CMP analyst forecast, CMP key metrics. See the CMP stock overview for the latest quote and news.
CMP ownership FAQ
Who owns the most Compass Minerals International stock?
The largest shareholders of Compass Minerals International are Koch, Inc (16.76%), SailingStone Capital Partners LLC (7.98%), BlackRock Inc (7.33%), State Street Corp (5.82%), American Century Companies Inc (5.42%).
What percentage of Compass Minerals International is owned by institutions?
Institutions hold 78.5% of Compass Minerals International's shares outstanding; insiders hold 23.26%.
Which funds own Compass Minerals International?
The largest fund holders of Compass Minerals International are Avantis US Small Cap Value ETF (5.42%), Victory Global Energy Transition A (4.65%), Vanguard MStar Total Stk Mkt Idx Invest (3.18%), Stt Strt®SPDR®S&P®Mtls &MngETF (3.16%), iShares Russell 2000 ETF (1.96%).
What is Compass Minerals International's short interest?
1.7M shares of Compass Minerals International were sold short, 5.61% of the float; at the average daily volume it would take 4.25 days to cover.
Are insiders buying or selling Compass Minerals International?
Of the latest 3 reported insider transactions in Compass Minerals International (since September 21, 2023), 2 were purchases and 1 were sales.
How many shares of Compass Minerals International are outstanding?
Compass Minerals International has 42.0M shares outstanding, of which 39.3M are in the public float.