Compass Minerals International, Inc. Auditor
The independent registered public accounting firm that signed the audit report in each annual report on Form 10-K, newest first. PCAOB firm ID and the internal-control attestation are as tagged on the cover from fiscal 2021; earlier rows come from the signed report text.
- 2025-12-12: Fiscal year end 2025-09-30; Auditor KPMG LLP; PCAOB firm ID 185; Location Kansas City, MO.
- 2024-12-16: Fiscal year end 2024-09-30; Auditor KPMG LLP; PCAOB firm ID 185; Location Kansas City, MO.
- 2024-10-29: Fiscal year end 2023-09-30; Auditor Ernst & Young LLP; PCAOB firm ID 42; Location Kansas City, MO.
- 2023-11-29: Fiscal year end 2023-09-30; Auditor Ernst & Young LLP; PCAOB firm ID 42; Location Kansas City, Missouri.
| Filed | Fiscal year end | Auditor | PCAOB firm ID | Location | Internal-control attestation |
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| 2025-12-12 | 2025-09-30 | KPMG LLP | 185 | Kansas City, MO | Yes |
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| 2024-12-16 | 2024-09-30 | KPMG LLP | 185 | Kansas City, MO | Yes |
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| 2024-10-29 | 2023-09-30 | Ernst & Young LLP | 42 | Kansas City, MO | Yes |
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| 2023-11-29 | 2023-09-30 | Ernst & Young LLP | 42 | Kansas City, Missouri | Yes |
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| 2022-12-14 | 2022-09-30 | Ernst & Young LLP | 42 | Kansas City, Missouri | Yes |
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| 2021-09-03 | 2020-12-31 | Ernst & Young LLP | | Kansas City, Missouri | Yes |
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| 2021-02-26 | 2020-12-31 | Ernst & Young LLP | | Kansas City, Missouri | Yes |
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| 2020-02-26 | 2019-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2019-03-01 | 2018-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2018-02-27 | 2017-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2017-03-01 | 2016-12-31 | Ernst & Young LLP | | | |
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| 2016-02-22 | 2015-12-31 | Ernst & Young LLP | | | |
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| 2015-02-23 | 2014-12-31 | Ernst & Young LLP | | | |
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| 2014-02-24 | 2013-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2013-02-21 | 2012-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2012-02-22 | 2011-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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| 2011-02-22 | 2010-12-31 | Ernst & Young LLP | | Kansas City, Missouri | |
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