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    Amprius Technologies Inc. filed SEC Form 8-K: Changes in Registrant's Certifying Accountant, Financial Statements and Exhibits

    4/21/26 4:58:14 PM ET
    $AMPX
    Industrial Machinery/Components
    Miscellaneous
    Get the next $AMPX alert in real time by email
    ampx-20260417
    0001899287FALSEfalse000189928700018992872026-04-172026-04-170001899287us-gaap:CommonStockMember2026-04-172026-04-170001899287ampx:RedeemableWarrantsMember2026-04-172026-04-17

    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)
    _________________________
    Delaware001-4131498-1591811
    (State or Other Jurisdiction
    of Incorporation)
    (Commission
    File Number)
    (IRS Employer
    Identification No.)
    1180 Page Ave
    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:
    oWritten communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
    oSoliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
    oPre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
    oPre-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:
    Title of each classTrading
    Symbol(s)
    Name of each exchange
    on which registered
    Common stock, par value $0.0001 per shareAMPXThe New York Stock Exchange
    Redeemable warrants, each exercisable for one share of common stock at an exercise price of $11.50AMPX.WThe 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 x
    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. o



    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    Financial Statements and Exhibits.
    (d) Exhibits.
    Exhibit
    Number
    Description
    16.1
    Letter from BDO USA, P.C. to the Securities and Exchange Commission, dated April 21, 2026
    104Cover Page Interactive Data File (embedded within the Inline XBRL document)



    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, 2026By:/s/ Ricardo C. Rodriguez
    Name: Ricardo C. Rodriguez
    Title: Chief Financial Officer

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