Filing Signals

Source: SEC EDGAR Compiled 2026-09-14 08:28 UTC All 21 checks passing

← All events

Amprius Technologies, Inc.

CIK 1899287 AMPX·Manufacturing · All EDGAR filings ↗

Progression

  1. Material weakness 10-K
  2. Auditor change 8-K +46d
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Form
An amendment is grouped with the report it amends; every 12b-25 notice is one group

Auditor change SEC item code

Amprius Technologies, Inc. dismissed BDO and engaged Deloitte

The company dismissed the auditor. BDO → Deloitte No disagreements disclosed.

Evidence
Direction
dismissed
Direction label
The company dismissed the auditor
Disagreements disclosed
No
Item code
4.01
Item title
Changes in Registrant's Certifying Accountant
Predecessor auditor
BDO
Predecessor tier
national
Severity
normal
Source
SEC 8-K item code
Successor auditor
Deloitte
Successor tier
big_four
Why
The company's independent registered accounting firm changed.

Source filing ↗

Material weakness high Filing comparison

Amprius Technologies, Inc. reported a material weakness in internal control

Internal control reported effective → Material weakness in internal control

In addition, any such failures could result in litigation or regulatory actions by the SEC or other regulatory authorities, loss of investor confidence, delisting of our securities and harm to our reputation and financial condition, or diversion of financial and management resources from the operation of our business. In 2023 and 2022, we identified material weaknesses in our internal control over financial reporting pertaining to the inadequate design and maintenance of our internal control over our financial…
Evidence
Current state
material_weakness
Current state label
Material weakness in internal control
Direction
newly reported
Prior filed
2025-03-20
Prior form
10-K
Prior state
effective
Prior state label
Internal control reported effective
Remediation stated
Yes
Severity
high
Source
Item 9A internal control conclusion, compared with the prior filing
Why
The company's conclusion on internal control over financial reporting changed: a material weakness was newly reported, or a previously reported one no longer appears.

Source filing ↗ Prior filing ↗