Compass Minerals International Inc SEC filings CMP
Compass Minerals International Inc has 1,005 filings in SEC EDGAR's recent list, going back to Oct 2, 2017. Its latest annual report, Form 10-K, was filed on Dec 12, 2025 for the period ended Sep 30, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 6, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Oct 28, 2026 (officer or director change). The company's fiscal year ends on September 30.
| Form | Description | Filed | Period |
|---|---|---|---|
| 8-K |
Current report
Officer or director change
|
Oct 28, 2026 | Oct 22, 2026 |
| 8-K |
Current report
Officer or director change, Other events
|
Oct 15, 2026 | Oct 9, 2026 |
| S-8 | Employee stock plan registration | Aug 27, 2026 | — |
| 10-Q | Quarterly report | Aug 6, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Officer or director change
|
Aug 5, 2026 | Aug 3, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| 11-K | Employee savings plan report | Jun 29, 2026 | Dec 31, 2025 |
| SD | Specialized disclosure (conflict minerals) | Jun 26, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Mar 24, 2026 | Mar 20, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Mar 10, 2026 | Mar 5, 2026 |
| 10-Q | Quarterly report | Feb 6, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 4, 2026 | Feb 4, 2026 |
| DEFA14A | Additional proxy material | Jan 23, 2026 | — |
| DEF 14A | Proxy statement | Jan 23, 2026 | Mar 5, 2026 |
| 8-K |
Current report
Other events
|
Dec 23, 2025 | Dec 10, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Dec 19, 2025 | Dec 18, 2025 |
| 10-K | Annual report | Dec 12, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Dec 8, 2025 | Dec 8, 2025 |
| 8-K |
Current report
Other events
|
Aug 28, 2025 | Aug 15, 2025 |
| 10-Q | Quarterly report | Aug 11, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 11, 2025 | Aug 11, 2025 |
| SD | Specialized disclosure (conflict minerals) | Jun 27, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Jun 27, 2025 | Jun 26, 2025 |
| 11-K | Employee savings plan report | Jun 26, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
Jun 16, 2025 | Jun 16, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 3, 2025 | Jun 3, 2025 |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations
|
May 7, 2025 | May 7, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 25, 2025 | Mar 25, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Mar 11, 2025 | Mar 6, 2025 |
| DEFA14A | Additional proxy material | Feb 18, 2025 | — |
| 10-Q | Quarterly report | Feb 10, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations
|
Feb 10, 2025 | Feb 10, 2025 |
| 8-K |
Current report
Officer or director change
|
Jan 28, 2025 | Jan 27, 2025 |
| DEFA14A | Additional proxy material | Jan 23, 2025 | — |
| DEF 14A | Proxy statement | Jan 23, 2025 | Mar 6, 2025 |
| 10-K | Annual report | Dec 16, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations
|
Dec 16, 2024 | Dec 16, 2024 |
| S-8 | Employee stock plan registration | Nov 13, 2024 | — |
| 10-Q | Quarterly report | Oct 30, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations
|
Oct 30, 2024 | Oct 29, 2024 |
| 10-Q/A | Amended quarterly report | Oct 30, 2024 | Mar 31, 2024 |
| 10-K/A | Amended annual report | Oct 29, 2024 | Sep 30, 2023 |
| 8-K |
Current report
Material agreement, Other events
|
Sep 19, 2024 | Sep 13, 2024 |
| 8-K |
Current report
Results of operations
|
Sep 17, 2024 | Sep 17, 2024 |
| 8-K |
Current report
Material agreement, Listing notice, Regulation FD disclosure
|
Aug 16, 2024 | Aug 12, 2024 |
| NT 10-Q | Filing | Aug 9, 2024 | Jun 30, 2024 |
| SD | Specialized disclosure (conflict minerals) | Jul 19, 2024 | — |
| 11-K | Employee savings plan report | Jul 12, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Restatement
|
Jul 3, 2024 | Jun 28, 2024 |
| 8-K |
Current report
Officer or director change
|
Jul 1, 2024 | Jul 1, 2024 |
| NT 11-K | Filing | Jun 28, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Officer or director change
|
Jun 25, 2024 | Jun 21, 2024 |
| 8-K |
Current report
Officer or director change
|
Jun 10, 2024 | Jun 7, 2024 |
| 8-K |
Current report
Bylaw or fiscal year change
|
May 17, 2024 | May 16, 2024 |
| 10-Q | Quarterly report | May 15, 2024 | Mar 31, 2024 |
| NT 10-Q | Filing | May 10, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations
|
May 7, 2024 | May 7, 2024 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Mar 27, 2024 | Mar 27, 2024 |
| 8-K |
Current report
Shareholder vote results
|
Mar 8, 2024 | Mar 5, 2024 |
| 8-K |
Current report
Officer or director change
|
Feb 21, 2024 | Feb 21, 2024 |
| 10-Q | Quarterly report | Feb 8, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2024 | Feb 7, 2024 |
| DEF 14A | Proxy statement | Jan 29, 2024 | Mar 5, 2024 |
| 8-K |
Current report
Officer or director change
|
Jan 16, 2024 | Jan 16, 2024 |
| 8-K |
Current report
Officer or director change
|
Jan 16, 2024 | Jan 15, 2024 |
| 8-K |
Current report
Officer or director change
|
Dec 19, 2023 | Dec 18, 2023 |
| 8-K |
Current report
Auditor change
|
Dec 7, 2023 | Dec 1, 2023 |
| 10-K | Annual report | Nov 29, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations
|
Nov 16, 2023 | Nov 16, 2023 |
| EFFECT | Filing | Sep 29, 2023 | — |
| 424B3 | Prospectus | Sep 29, 2023 | — |
| CORRESP | Letter to the SEC | Sep 29, 2023 | — |
| UPLOAD | Letter from the SEC | Sep 29, 2023 | — |
| S-3 | Shelf registration | Sep 21, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 21, 2023 | Sep 21, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 14, 2023 | Aug 11, 2023 |
| 10-Q | Quarterly report | Aug 8, 2023 | Jun 30, 2023 |
| 8-K |
Current report
Results of operations
|
Aug 8, 2023 | Aug 8, 2023 |
| 8-K/A |
Amended current report
Shareholder vote results
|
Jun 30, 2023 | Feb 15, 2023 |
| 11-K | Employee savings plan report | Jun 29, 2023 | Dec 31, 2022 |
| 10-Q | Quarterly report | May 9, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations
|
May 9, 2023 | May 9, 2023 |
| 8-K |
Current report
Material agreement, New debt, Regulation FD disclosure
|
May 9, 2023 | May 5, 2023 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure, Other events
|
May 5, 2023 | May 5, 2023 |
| 8-K |
Current report
Officer or director change
|
May 4, 2023 | May 3, 2023 |
| 8-K |
Current report
Other events
|
Apr 4, 2023 | Apr 4, 2023 |
| 8-K |
Current report
Other events
|
Apr 4, 2023 | Mar 29, 2023 |
| 8-K |
Current report
Shareholder vote results
|
Feb 21, 2023 | Feb 15, 2023 |
| 10-Q | Quarterly report | Feb 7, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations
|
Feb 7, 2023 | Feb 7, 2023 |
| DEFA14A | Additional proxy material | Jan 3, 2023 | — |
| DEF 14A | Proxy statement | Jan 3, 2023 | Feb 15, 2023 |
| UPLOAD | Letter from the SEC | Jan 3, 2023 | — |
| 10-K | Annual report | Dec 14, 2022 | Sep 30, 2022 |
| CORRESP | Letter to the SEC | Dec 13, 2022 | — |
| CORRESP | Letter to the SEC | Dec 2, 2022 | — |
| NT 10-K | Filing | Nov 29, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Results of operations
|
Nov 29, 2022 | Nov 29, 2022 |
| 8-K |
Current report
Material agreement
|
Nov 22, 2022 | Nov 16, 2022 |
| UPLOAD | Letter from the SEC | Nov 17, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Nov 16, 2022 | Nov 13, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 10, 2022 | Nov 10, 2022 |
| CORRESP | Letter to the SEC | Oct 20, 2022 | — |
| 8-K |
Current report
Unregistered share sale, Regulation FD disclosure
|
Oct 18, 2022 | Oct 18, 2022 |
| CORRESP | Letter to the SEC | Oct 13, 2022 | — |
| UPLOAD | Letter from the SEC | Sep 28, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 14, 2022 | Sep 14, 2022 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure
|
Sep 14, 2022 | Sep 14, 2022 |
| CORRESP | Letter to the SEC | Sep 8, 2022 | — |
| CORRESP | Letter to the SEC | Sep 1, 2022 | — |
| CORRESP | Letter to the SEC | Aug 17, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Aug 8, 2022 | Aug 5, 2022 |
| 10-Q | Quarterly report | Aug 5, 2022 | Jun 30, 2022 |
| UPLOAD | Letter from the SEC | Aug 4, 2022 | — |
| 8-K |
Current report
Results of operations
|
Aug 4, 2022 | Aug 4, 2022 |
| CORRESP | Letter to the SEC | Jul 15, 2022 | — |
| 8-K |
Current report
Officer or director change
|
Jul 12, 2022 | Jul 11, 2022 |
| 11-K | Employee savings plan report | Jun 28, 2022 | Dec 31, 2021 |
| CORRESP | Letter to the SEC | Jun 27, 2022 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 27, 2022 | Jun 27, 2022 |
| UPLOAD | Letter from the SEC | Jun 15, 2022 | — |
| S-8 | Employee stock plan registration | Jun 14, 2022 | — |
| 8-K |
Current report
Material agreement
|
Jun 13, 2022 | Jun 13, 2022 |
| 10-Q | Quarterly report | May 10, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Officer or director change
|
May 9, 2022 | May 9, 2022 |
| 8-K |
Current report
Results of operations
|
May 5, 2022 | May 5, 2022 |
| 8-K |
Current report
Other events
|
Apr 20, 2022 | Apr 20, 2022 |
| 8-K |
Current report
Other events
|
Apr 12, 2022 | Apr 7, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 11, 2022 | Apr 11, 2022 |
| 8-K |
Current report
Officer or director change
|
Mar 24, 2022 | Mar 24, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 2, 2022 | Mar 2, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Feb 28, 2022 | Feb 24, 2022 |
| 10-Q | Quarterly report | Feb 8, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Results of operations
|
Feb 8, 2022 | Feb 8, 2022 |
| 8-K |
Current report
Officer or director change
|
Jan 24, 2022 | Jan 19, 2022 |
| DEFA14A | Additional proxy material | Jan 11, 2022 | — |
| DEF 14A | Proxy statement | Jan 11, 2022 | Feb 24, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Jan 6, 2022 | Jan 6, 2022 |
| 8-K/A | Amended current report | Dec 8, 2021 | Nov 29, 2021 |
| 8-K |
Current report
Officer or director change
|
Dec 2, 2021 | Dec 1, 2021 |
| 10-KT | Transition report | Nov 30, 2021 | Sep 30, 2021 |
| NT 10-K | Filing | Nov 30, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Other events
|
Nov 29, 2021 | Nov 29, 2021 |
| UPLOAD | Letter from the SEC | Nov 23, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Nov 17, 2021 | Nov 16, 2021 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 15, 2021 | Nov 15, 2021 |
| CORRESP | Letter to the SEC | Nov 10, 2021 | — |
| 8-K |
Current report
Officer or director change
|
Oct 27, 2021 | Oct 22, 2021 |
| UPLOAD | Letter from the SEC | Oct 27, 2021 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Oct 19, 2021 | Oct 19, 2021 |
| 8-K |
Current report
Officer or director change
|
Oct 12, 2021 | Oct 12, 2021 |
| 8-K |
Current report
Results of operations
|
Sep 29, 2021 | Sep 29, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 20, 2021 | Sep 20, 2021 |
| 10-Q/A | Amended quarterly report | Sep 3, 2021 | Mar 31, 2021 |
| 10-K/A | Amended annual report | Sep 3, 2021 | Dec 31, 2020 |
| CORRESP | Letter to the SEC | Aug 23, 2021 | — |
| 8-K |
Current report
Results of operations
|
Aug 13, 2021 | Aug 13, 2021 |
| 10-Q | Quarterly report | Aug 13, 2021 | Jun 30, 2021 |
| CORRESP | Letter to the SEC | Aug 10, 2021 | — |
| NT 10-Q | Filing | Aug 9, 2021 | Jun 30, 2021 |
| 8-K |
Current report
Restatement, Regulation FD disclosure
|
Aug 5, 2021 | Aug 4, 2021 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 13, 2021 | Jul 13, 2021 |
| 8-K/A |
Amended current report
Acquisition or sale of assets
|
Jul 8, 2021 | Jul 1, 2021 |
| 8-K |
Current report
Acquisition or sale of assets, Other events
|
Jul 1, 2021 | Jul 1, 2021 |
| 11-K | Employee savings plan report | Jun 25, 2021 | Dec 31, 2020 |
| UPLOAD | Letter from the SEC | Jun 25, 2021 | — |
| 8-K |
Current report
Bylaw or fiscal year change
|
Jun 25, 2021 | Jun 23, 2021 |
| CORRESP | Letter to the SEC | May 26, 2021 | — |
| 8-K |
Current report
Shareholder vote results
|
May 20, 2021 | May 18, 2021 |
| CORRESP | Letter to the SEC | May 17, 2021 | — |
| 10-Q | Quarterly report | May 7, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations
|
May 4, 2021 | May 4, 2021 |
| CORRESP | Letter to the SEC | Apr 22, 2021 | — |
| UPLOAD | Letter from the SEC | Apr 21, 2021 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 12, 2021 | Apr 12, 2021 |
| 8-K |
Current report
Other events
|
Apr 8, 2021 | Apr 8, 2021 |
| DEFA14A | Additional proxy material | Apr 2, 2021 | — |
| DEF 14A | Proxy statement | Apr 2, 2021 | May 18, 2021 |
| 8-K |
Current report
Other events
|
Mar 31, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Material agreement, Other events
|
Mar 24, 2021 | Mar 23, 2021 |
| 10-K | Annual report | Feb 26, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations
|
Feb 16, 2021 | Feb 16, 2021 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jan 5, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Bylaw or fiscal year change
|
Dec 30, 2020 | Dec 26, 2020 |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2020 | Nov 4, 2020 |
| 10-Q | Quarterly report | Aug 5, 2020 | Jun 30, 2020 |
| 8-K |
Current report
Results of operations
|
Aug 4, 2020 | Aug 4, 2020 |
| 8-K |
Current report
Material agreement, New debt
|
Jul 1, 2020 | Jun 30, 2020 |
| 11-K | Employee savings plan report | Jun 26, 2020 | Dec 31, 2019 |
| 8-K |
Current report
Change to shareholder rights, Officer or director change, Bylaw or fiscal year change, Shareholder vote results
|
May 19, 2020 | May 14, 2020 |
| S-8 | Employee stock plan registration | May 14, 2020 | — |
| 10-Q | Quarterly report | May 6, 2020 | Mar 31, 2020 |
| 8-K |
Current report
Results of operations
|
May 5, 2020 | May 5, 2020 |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 6, 2020 | Apr 6, 2020 |
| DEFA14A | Additional proxy material | Mar 31, 2020 | — |
| DEF 14A | Proxy statement | Mar 31, 2020 | May 14, 2020 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Mining & Quarrying of Nonmetallic Minerals (No Fuels) (SIC 1400)
- Listed as
- CMP (NYSE)
- Fiscal year ends
- September 30
- Incorporated in
- DE
- Headquarters
- Overland Park, KS
- SEC filer status
- Accelerated filer
- SEC CIK
- 1227654
- Former names
- SALT HOLDINGS CORP (until Nov 5, 2003)
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All 37 Mining & Quarrying of Nonmetallic Minerals (No Fuels) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.