Home / Auditor changes / Amprius Technologies, Inc.

3/5Amprius Technologies, Inc. (AMPX): Auditor change

Filed 2026-04-21 路 Form 8-K 路 Accession 0001899287-26-000022 mid

Market data

Price before filing: $19.61 (2026-04-20 close, split/dividend-adjusted)
Market cap at flag: $2.93B (2026-04-21) 路 Latest: $1.11B (2026-10-16)

What happened next

WindowAMPXSPYvs SPY
30 days-22.0%+4.8%-26.8%2026-05-21
90 days-48.3%+5.0%-53.3%2026-07-20
180 dayspendingpendinguntil 2026-10-18

Return from the last close before the filing date to the first close on/after the window end. Pending windows have not fully elapsed. Past performance says nothing certain about the future.

Verified excerpt

"(the "Company") approved the engagement of Deloitte & Touche LLP ("Deloitte") 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."

Quoted from the filing. Source

What this means

The company changed its outside auditor (8-K Item 4.01). A dismissal or resignation, especially near an annual report or with reported disagreements, is a warning sign. Changes caused by audit firms merging are usually routine.

Type: dismissed
Disagreements reported: no
Former auditor: BDO USA, P.C. · New auditor: Deloitte & Touche LLP

Read the original filing on SEC.gov →

Not investment advice. Automated summary; verify against the filing.

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