---
schema_version: "secwatch.filing_event.v1"
accession: "0001477932-22-005733"
form_type: "8-K"
ticker: "BCHT"
cik: "0000728385"
company_name: "Birchtech Corp."
filed_at: "2022-08-08T23:59:59+00:00"
generated_at: "2026-06-24T03:04:58.588223+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Midwest Energy Emissions appoints Marcum LLP as auditor; prior reports flagged going concern

## Summary
- Board approved Marcum LLP as independent auditor for FY2022 on Aug 3, 2022.
- Prior auditor Rotenberg combined with Marcum effective Feb 1, 2022; formally resigned Aug 3.
- Rotenberg's 2020 and 2021 reports included an explanatory paragraph on substantial doubt about going concern.
- No disagreements or reportable events with Rotenberg during the past two fiscal years.

## SEC filing metadata
- accession: 0001477932-22-005733
- form_type: 8-K
- ticker: BCHT
- cik: 0000728385
- company_name: Birchtech Corp.
- filed_at: 2022-08-08T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/728385/000147793222005733/0001477932-22-005733-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/728385/000147793222005733/meec_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001477932-22-005733
- JSON: https://secwatch.observer/filing/0001477932-22-005733.json
- Plain text: https://secwatch.observer/filing/0001477932-22-005733.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.