# EDGAR Filing Document

**Accession Number:** 0001899287
**File Stem:** 0001899287-26-000022
**Filing Date:** 2026-4
**Character Count:** 7299
**Document Hash:** 03501e465827081340ad78e548d658f7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001899287-26-000022.hdr.sgml**: 20260421

**ACCESSION NUMBER**: 0001899287-26-000022

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20260417

**ITEM INFORMATION**: Changes in Registrant's Certifying Accountant

**FILED AS OF DATE**: 20260421

**DATE AS OF CHANGE**: 20260421

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Amprius Technologies, Inc.
- **CENTRAL INDEX KEY:** 0001899287
- **STANDARD INDUSTRIAL CLASSIFICATION:** MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 981591811
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-41314
- **FILM NUMBER:** 26880341

**BUSINESS ADDRESS:**
- **STREET 1:** 1180 PAGE AVENUE
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538
- **BUSINESS PHONE:** (800) 425-8803

**MAIL ADDRESS:**
- **STREET 1:** 1180 PAGE AVENUE
- **CITY:** FREMONT
- **STATE:** CA
- **ZIP:** 94538

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Kensington Capital Acquisition Corp. IV
- **DATE OF NAME CHANGE:** 20211214

?xml version='1.0' encoding='ASCII'? ampx-20260417

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**WASHINGTON, D.C. 20549**

_________________________

**FORM 8-K**

_________________________

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d)**

**of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported): April 17, 2026**

_________________________

**Amprius Technologies, Inc.**

**(Exact name of Registrant as Specified in Its Charter)**

_________________________

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| | | |
|:---|:---|:---|
| **Delaware** | **001-41314** | **98-1591811** |
| **(State or Other Jurisdiction**<br>**of Incorporation)** | **(Commission**<br>**File Number)** | **(IRS Employer**<br>**Identification No.)** |

---

---

| | |
|:---|:---|
| **1180 Page Ave**<br>**Fremont, California** | **94538** |
| **(Address of Principal Executive Offices)** | **(Zip Code)** |

---

**Registrant's Telephone Number, Including Area Code: (800) 425-8803**

**N/A**

**(Former Name or Former Address, if Changed Since Last Report)**

_________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

□ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

□ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

□ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

□ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

**Securities registered pursuant to Section 12(b) of the Act:**

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| | | |
|:---|:---|:---|
| **Title of each class** | **Trading<br>Symbol(s)** | **Name of each exchange<br>on which registered** |
| **Common stock, par value $0.0001 per share** | **AMPX** | **The New York Stock Exchange** |
| **Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50** | **AMPX.W** | **The New York Stock Exchange** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ⌧

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. □

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**Item 4.01 Changes in Registrant's Certifying Accountant**

On April 17, 2026, the Audit Committee (the "Audit Committee") of the board of directors of Amprius Technologies, Inc. (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.

On April 17, 2026, the Audit Committee dismissed BDO USA, P.C. ("BDO"), the Company's independent registered public accounting firm for the year ending December 31, 2025 and prior years, and notified BDO that they will not be engaged to audit the Company's consolidated financial statements for the year ending December 31, 2026.

The reports of BDO on the Company's financial statements as of December 31, 2025 and 2024 did not contain an adverse opinion or a disclaimer of opinion, and was not qualified or modified as to audit scope or accounting principles.

During the years ended December 31, 2025 and 2024, and during the subsequent interim period through April 17, 2026, there were (i) no disagreements within the meaning of Item 304(a)(1)(iv) of Regulation S-K between the Company and BDO on any matter of accounting principles or practices, financial statement disclosure, or auditing scope or procedures, which disagreement, if not resolved to BDO's satisfaction, would have caused BDO to make reference in connection with their opinion to the subject matter of the disagreement and (ii) no reportable events (within the meaning of Item 304(a)(1)(v) of Regulation S-K).

The Company provided BDO with a copy of the disclosures in this Current Report on Form 8-K (the "Current Report") and requested that BDO furnish the Company with a letter addressed to the Securities and Exchange Commission stating whether it agrees with the statements made by the Company set forth above, and if not, stating the respects in which it does not agree. A copy of BDO's letter, dated April 21, 2026, is filed as Exhibit 16.1 to this Current Report on Form 8-K.

**Item 9.01&nbsp;&nbsp;&nbsp;&nbsp;Financial Statements and Exhibits.**

**(d) Exhibits.**

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| | |
|:---|:---|
| **Exhibit**<br>**Number** | **Description** |
| 16.1 | <u>[Letter from BDO USA, P.C. to the Securities and Exchange Commission, dated April](bdoauditortransitionletter.htm)[21](bdoauditortransitionletter.htm)[, 2026](bdoauditortransitionletter.htm)</u> |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

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**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
| | | **AMPRIUS TECHNOLOGIES, INC.** |
| Date: April 21, 2026 | By: | /s/ Ricardo C. Rodriguez |
|  |  | Name: Ricardo C. Rodriguez |
|  |  | Title: Chief Financial Officer |

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## Exhibit 16.1

April 21, 2026

Securities and Exchange Commission

100 F Street N.E.

Washington, D.C. 20549

We have been furnished with a copy of the response to Item 4.01 of Form 8-K for the event that occurred on April 17, 2026, to be filed by our former client, Amprius Technologies, Inc. We agree with the statements made in response to that Item insofar as they relate to our Firm.

Very truly yours,

/s/ BDO USA, P.C.

<br>