---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-021035"
form_type: "8-K"
ticker: "AQMS"
cik: "0001621832"
company_name: "Aqua Metals, Inc."
filed_at: "2023-07-28T23:59:59+00:00"
generated_at: "2026-06-12T23:04:11.094416+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Aqua Metals auditor Armanino resigns effective after Q3 2023 filing

## Summary
- Armanino LLP resigned as Aqua Metals' independent auditor, effective after the Q3 2023 10-Q filing.
- No disagreements or reportable events occurred during fiscal years 2021, 2022, or interim 2023.
- Armanino's audit reports for 2021 and 2022 were unqualified with no adverse opinions.
- Aqua Metals is in the process of selecting a new independent registered public accounting firm.

## SEC filing metadata
- accession: 0001437749-23-021035
- form_type: 8-K
- ticker: AQMS
- cik: 0001621832
- company_name: Aqua Metals, Inc.
- filed_at: 2023-07-28T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1621832/000143774923021035/0001437749-23-021035-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1621832/000143774923021035/aqms20230725_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-021035
- JSON: https://secwatch.observer/filing/0001437749-23-021035.json
- Plain text: https://secwatch.observer/filing/0001437749-23-021035.txt

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