Century Aluminum Company 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.
- 2026-03-03: Fiscal year end 2025-12-31; Auditor Deloitte & Touche LLP; PCAOB firm ID 34; Location Chicago, Illinois.
- 2025-03-03: Fiscal year end 2024-12-31; Auditor Deloitte & Touche LLP; PCAOB firm ID 34; Location Chicago, Illinois.
- 2024-03-15: Fiscal year end 2023-12-31; Auditor Deloitte & Touche LLP; PCAOB firm ID 34; Location Chicago, Illinois.
- 2023-02-27: Fiscal year end 2022-12-31; Auditor Deloitte & Touche LLP; PCAOB firm ID 34; Location Chicago, Illinois.
| Filed | Fiscal year end | Auditor | PCAOB firm ID | Location | Internal-control attestation |
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| 2026-03-03 | 2025-12-31 | Deloitte & Touche LLP | 34 | Chicago, Illinois | Yes |
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| 2025-03-03 | 2024-12-31 | Deloitte & Touche LLP | 34 | Chicago, Illinois | Yes |
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| 2024-03-15 | 2023-12-31 | Deloitte & Touche LLP | 34 | Chicago, Illinois | Yes |
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| 2023-02-27 | 2022-12-31 | Deloitte & Touche LLP | 34 | Chicago, Illinois | Yes |
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| 2022-02-25 | 2021-12-31 | Deloitte & Touche LLP | 34 | Chicago, Illinois | Yes |
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| 2021-03-04 | 2020-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | Yes |
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| 2020-02-27 | 2019-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | |
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| 2019-02-28 | 2018-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | |
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| 2018-02-28 | 2017-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | |
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| 2017-03-16 | 2016-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | |
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| 2017-03-14 | 2016-12-31 | Deloitte & Touche LLP | | Chicago, Illinois | |
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| 2016-03-07 | 2015-12-31 | Deloitte & Touche LLP | | Pittsburgh, Pennsylvania | |
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| 2015-03-02 | 2014-12-31 | Deloitte & Touche LLP | | Pittsburgh, Pennsylvania | |
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| 2014-03-14 | 2013-12-31 | Deloitte & Touche LLP | | Pittsburgh, Pennsylvania | |
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| 2013-03-18 | 2012-12-31 | Deloitte & Touche LLP | | Pittsburgh, Pennsylvania | |
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| 2012-02-29 | 2011-12-31 | Deloitte & Touche LLP | | Pittsburgh, Pennsylvania | |
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| 2009-03-02 | 2008-12-31 | DELOITTE & TOUCHE LLP | | | |
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