ARQ, 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.
- 2026-03-10: Fiscal year end 2025-12-31; Auditor Baker Tilly US, LLP; PCAOB firm ID 23; Location Denver, Colorado.
- 2025-03-05: Fiscal year end 2024-12-31; Auditor Moss Adams LLP; PCAOB firm ID 659; Location Denver, Colorado.
- 2024-03-12: Fiscal year end 2023-12-31; Auditor Moss Adams LLP; PCAOB firm ID 659; Location Denver, Colorado.
- 2023-03-08: Fiscal year end 2022-12-31; Auditor Moss Adams LLP; PCAOB firm ID 659; Location Denver, Colorado.
| Filed | Fiscal year end | Auditor | PCAOB firm ID | Location | Internal-control attestation |
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| 2026-03-10 | 2025-12-31 | Baker Tilly US, LLP | 23 | Denver, Colorado | Yes |
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| 2025-03-05 | 2024-12-31 | Moss Adams LLP | 659 | Denver, Colorado | Yes |
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| 2024-03-12 | 2023-12-31 | Moss Adams LLP | 659 | Denver, Colorado | No |
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| 2023-03-08 | 2022-12-31 | Moss Adams LLP | 659 | Denver, Colorado | Yes |
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| 2022-03-08 | 2021-12-31 | Moss Adams LLP | 659 | Denver, Colorado | No |
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| 2021-03-10 | 2020-12-31 | Moss Adams LLP | | Denver, Colorado | No |
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| 2020-03-16 | 2019-12-31 | Moss Adams LLP | | Denver, Colorado | |
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| 2019-03-18 | 2018-12-31 | Moss Adams LLP | | Denver, Colorado | |
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| 2018-03-12 | 2017-12-31 | Moss Adams LLP | | Denver, Colorado | |
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| 2017-03-13 | 2016-12-31 | Hein & Associates LLP | | Denver, Colorado | |
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| 2016-04-19 | 2015-12-31 | Hein & Associates LLP | | Denver, Colorado | |
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| 2016-03-17 | 2014-12-31 | Hein & Associates LLP | | Denver, Colorado | |
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| 2016-02-29 | 2014-12-31 | Hein & Associates LLP | | Denver, Colorado | |
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