---
schema_version: "secwatch.filing_event.v1"
accession: "0001899287-26-000022"
form_type: "8-K"
ticker: "AMPX"
cik: "0001899287"
company_name: "Amprius Technologies, Inc."
filed_at: "2026-04-21T23:59:59+00:00"
generated_at: "2026-05-15T05:10:20.515895+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Amprius Tech dismisses BDO, appoints Deloitte as auditor for FY2026

## Summary
- Audit Committee dismissed BDO USA, P.C. effective Apr 17, 2026; Deloitte & Touche LLP engaged for FY2026 audit.
- BDO's reports for 2024 and 2025 were unqualified with no adverse opinion or scope modification.
- No disagreements or reportable events between the Company and BDO during 2024, 2025, or interim 2026.
- BDO furnished a letter to the SEC (Exhibit 16.1) agreeing with the Company's disclosures.

## SEC filing metadata
- accession: 0001899287-26-000022
- form_type: 8-K
- ticker: AMPX
- cik: 0001899287
- company_name: Amprius Technologies, Inc.
- filed_at: 2026-04-21T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 4.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/ampx-20260417.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001899287-26-000022
- JSON: https://secwatch.observer/filing/0001899287-26-000022.json
- Plain text: https://secwatch.observer/filing/0001899287-26-000022.txt

## Source-grounded claims
- claim_id: 08e70cdefdc10564f621313d4b8a2f54db018448
  claim: Amprius Technologies, Inc. dismissed BDO USA, P.C. as its auditor.
  evidence_excerpt: and notified BDO that they will not be engaged to audit the Company's consolidated financial statements for the year ending December 31, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm
- claim_id: b4f130740968ff62429bab29ea870a0449b0d951
  claim: Amprius Technologies, Inc. engaged Deloitte & Touche LLP as its auditor.
  evidence_excerpt: as the Company's independent registered public accounting firm to audit the Company’s consolidated financial statements for the year ending December 31, 2026, effective as of April 21, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/1899287/000189928726000022/0001899287-26-000022-index.htm

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