Compass Minerals International Inc
CMP- Exchange
- NYSE
- Industry
- Mining & Quarrying of Nonmetallic Minerals (No Fuels)
- SEC CIK
- 0001227654
No open-market purchases or sales by Compass Minerals International Inc insiders were filed in the last 90 days; 234 institutions reported holding it in 13F filings for Q2 2026, worth $1.21B in total; no superinvestor holds it.
Holders of 5% or more of CMP
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Compass Minerals International Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 6.10%2.53M shares | −2.10 ppfrom 8.20% | Apr 28, 20253 filings | Apr 27, 2026 | SEC |
| State Street Corp | 13G | 5.50%2.32M shares | +0.60 ppfrom 4.90% | Nov 10, 20253 filings | May 12, 2026 | SEC |
| M Partners Fund LP | 13G | 5.49%2.29M shares | New | Nov 18, 20251 filing | Nov 18, 2025 | SEC |
| American Century Investment Management Inc | 13G | 5.40%2.27M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
13 Schedule 13D and 13G filings on Compass Minerals International Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20262:36 PM ET | American Century Investment Management Incand 3 others | 13G | 5.40%2.27M shares | New | Jun 30, 2026 | SEC |
| May 12, 202610:35 AM ET | State Street Corp | 13G | 5.50%2.32M shares | +0.60 ppfrom 4.90% | Mar 31, 2026 | SEC |
| Apr 27, 20264:12 PM ET | BlackRock, Inc. | 13G/A | 6.10%2.53M shares | −2.10 ppfrom 8.20% | Mar 31, 2026 | SEC |
| Mar 26, 20265:39 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −6.65 ppfrom 6.65%Below 5% | Mar 13, 2026 | SEC |
| Feb 9, 20266:29 AM ET | State Street Corp | 13G | 4.90%2.05M shares | −0.60 ppfrom 5.50%Below 5% | Dec 31, 2025 | SEC |
| Nov 18, 20254:59 PM ET | M Partners Fund LPand 2 others | 13G | 5.49%2.29M shares | New | Nov 11, 2025 | SEC |
| Nov 10, 20258:23 AM ET | State Street Corp | 13G | 5.50%2.31M shares | New | Sep 30, 2025 | SEC |
| Oct 30, 20252:54 PM ET | Vanguard Group Inc | 13G/A | 6.65%2.78M shares | +1.21 ppfrom 5.44% | Sep 30, 2025 | SEC |
| Aug 14, 20251:01 PM ET | Gumshoe Capital Management LLCand 3 others | 13G/A | 3.20%1.32M shares | −1.80 ppfrom 5.00%Below 5% | Jun 30, 2025 | SEC |
| Jul 17, 20257:54 PM ET | BlackRock, Inc. | 13G/A | 8.20%3.42M shares | −1.60 ppfrom 9.80% | Jun 30, 2025 | SEC |
| Apr 28, 20257:14 PM ET | BlackRock, Inc. | 13G/A | 9.80%4.09M shares | – | Mar 31, 2025 | SEC |
| Apr 28, 20256:33 PM ET | Gumshoe Capital Management LLCand 3 others | 13G | 5.00%2.09M shares | New | Apr 21, 2025 | SEC |
| Jan 30, 20259:35 PM ET | Vanguard Group Inc | 13G/A | 5.44%2.26M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Compass Minerals International Inc shares.
No Form 144 notices for Compass Minerals International Inc are on file.