Amprius Technologies, Inc. Announces Change in Independent Registered Public Accounting Firm

Fremont, CA | April 21, 2026 — Amprius Technologies, Inc. (NYSE: AMPX), a leading developer and manufacturer of advanced lithium-ion batteries, has announced a significant change in its independent registered public accounting firm, a move that could have implications for investors and shareholders.

Key Points from the SEC Form 8-K Filing

• Auditor Transition: On April 17, 2026, the Audit Committee of Amprius Technologies’ Board of Directors approved the engagement of Deloitte & Touche LLP (“Deloitte”) as the new independent registered public accounting firm. The change will take effect as of April 21, 2026. Deloitte will be responsible for auditing the company’s consolidated financial statements for the fiscal year ending December 31, 2026.
• Previous Auditor: The outgoing auditor, BDO USA, P.C. (“BDO”), was dismissed effective April 21, 2026.
• No Disagreements or Reportable Events: Amprius reported that during the years ended December 31, 2025 and 2024, as well as the interim period through April 17, 2026, there were:
  • No disagreements between the company and BDO regarding accounting principles, practices, financial statement disclosures, or audit procedures.
  • No reportable events as defined by Item 304(a)(1)(v) of Regulation S-K.
• Confirmation from BDO: BDO has provided a letter to the SEC, agreeing with Amprius’ statements regarding their departure and confirming there were no unresolved issues or disagreements.

Shareholder and Investor Implications

• Price Sensitivity: Changes in a company’s auditors can be viewed as significant by investors. The appointment of Deloitte & Touche LLP, a globally recognized Big Four audit firm, may be interpreted as a step towards enhanced financial oversight and governance. Such moves are generally perceived positively, especially when there are no underlying disputes or negative audit findings.
• No Negative Findings: It is important for shareholders to note that the transition is not due to any disagreements, concerns about accounting practices, or reportable events. This helps mitigate the risk of negative speculation or adverse impact on share value.
• Emerging Growth Company Status: Amprius Technologies continues to qualify as an emerging growth company, which may affect its disclosure requirements and compliance with certain regulations.
• Trading Information: The company’s common stock trades on the New York Stock Exchange under the symbol AMPX, and its redeemable warrants trade as AMPX.W.

Details for Investors

• Company Address: 1180 Page Avenue, Fremont, CA 94538
• Fiscal Year End: December 31
• Industry Classification: Miscellaneous Electrical Machinery, Equipment (Manufacturing)
• Company EIN: 98-1591811
• Contact: (800) 425-8803
• Former Name: Kensington Capital Acquisition Corp. IV (name changed December 14, 2021)

Potential Impact on Share Value

While the change in auditor is not associated with any negative findings, such transitions can affect investor sentiment. The engagement of Deloitte may be viewed as a commitment to high standards of financial reporting and controls. Investors should monitor any future announcements from Amprius, particularly the release of its audited financial statements for 2026, for further insights.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. Investors should conduct their own due diligence and consult with professional advisors before making any investment decisions. The information above is sourced from Amprius Technologies, Inc.’s SEC filings as of April 21, 2026.

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