BIRCHTECH CORP. 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.
- 2026-03-31: Fiscal year end 2025-12-31; Auditor Rosenberg Rich Baker Berman, P.A.; PCAOB firm ID 89; Location Somerset, New Jersey.
- 2025-03-31: Fiscal year end 2024-12-31; Auditor Rosenberg Rich Baker Berman, P.A.; PCAOB firm ID 89; Location Somerset, New Jersey.
- 2024-04-16: Fiscal year end 2023-12-31; Auditor Rosenberg Rich Baker Berman, P.A.; PCAOB firm ID 89; Location Somerset, New Jersey.
- 2023-05-15: Fiscal year end 2022-12-31; Auditor Rotenberg Meril Solomon Bertiger & Guttilla, P.C.; PCAOB firm ID 361; Location Saddle Brook, New Jersey.
| Filed | Fiscal year end | Auditor | PCAOB firm ID | Location | Internal-control attestation |
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| 2026-03-31 | 2025-12-31 | Rosenberg Rich Baker Berman, P.A. | 89 | Somerset, New Jersey | No |
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| 2025-03-31 | 2024-12-31 | Rosenberg Rich Baker Berman, P.A. | 89 | Somerset, New Jersey | No |
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| 2024-04-16 | 2023-12-31 | Rosenberg Rich Baker Berman, P.A. | 89 | Somerset, New Jersey | No |
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| 2023-05-15 | 2022-12-31 | Rotenberg Meril Solomon Bertiger & Guttilla, P.C. | 361 | Saddle Brook, New Jersey | No |
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| 2022-04-05 | 2021-12-31 | Rotenberg Meril Solomon Bertiger & Guttilla, P.C | 361 | Saddle Brook, New Jersey | No |
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| 2021-04-05 | 2020-12-31 | Marcum LLP | | Houston, Texas | |
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| 2020-05-14 | 2019-12-31 | Marcum LLP | | Houston, Texas | |
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| 2019-04-11 | 2018-12-31 | Marcum LLP | | New York, NY | |
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| 2012-12-21 | 2011-12-31 | Tarvaran Askelson & Company, LLP | | Laguna Niguel, California | |
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| 2012-04-12 | 2011-12-31 | Tarvaran Askelson & Company, LLP | | Laguna Niguel, California | |
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| 2011-04-19 | 2010-12-31 | Tarvaran Askelson & Company, LLP | | Laguna Niguel, California | |
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| 2010-04-15 | 2009-12-31 | Tarvaran Askelson & Company, LLP | | Niguel, California | |
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| 2009-04-13 | 2008-12-31 | Tarvaran Askelson & Company, LLP | | Laguna Niguel, California | |
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