Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Entry into a Material Definitive Agreement. On August 7, 2026, Amprius Technologies, Inc. (the “Company”) entered into the Second Amendment to Industrial Lease Agreement (the “Second Amendment”) with Los Altos Fields, LLC, amending the Company's existing lease for its facility located at 1000-1180 Page Avenue, Fremont, California. The Second Amendment extends the lease term, which had been scheduled to expire on June 30, 2027, for an additional eighty-four (84) months, commencing July 1, 2027…

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

Unregistered Sales of Equity Securities On May 18 and May 19, 2026, the Company closed the transactions contemplated by the Exchange Agreements and issued an aggregate of 2,726,631 Exchange Shares to the Public Warrant Holders in exchange for the surrender and cancellation of the Exchange Public Warrants. The issuance by the Company of the Exchange Shares was made in reliance on Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”), in reliance in part on the repres…

Entry into Material Definitive Agreement On May 6, 2026, Amprius Technologies, Inc. (the “Company”) entered into Warrant Exchange Agreements (the “Exchange Agreements”) with certain institutional holders (the “Public Warrant Holders”) of the Company’s public warrants (the “Exchange Public Warrants”), each of which is exercisable to purchase one share of common stock of the Company, par value $0.0001 per share (“Common Stock”), at an exercise price of $11.50 (the “Exercise Price”) per existing…

Unregistered Sales of Equity Securities The disclosures set forth above under

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

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.…

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

Termination of a Material Definitive Agreement. On January 30, 2026, Amprius Technologies, Inc. (the "Company") entered into a lease termination agreement (the “Lease Termination”) with Starboard Platform Brighton JV, LLC (the “Landlord”) to terminate the Company’s existing lease (the "Lease") for approximately 774,155 rentable square feet of that certain improved real property located at 4353 East Bromley Lane, Brighton, Colorado 80601 (formerly known as, and referenced in the Lease as, 1887…

Other Events On January 12, 2026, Amprius Technologies, Inc. (the “Company”) announced that it successfully completed all sales under its at-the-market equity offering program (the “ATM Program”). The ATM Program was previously established pursuant to the At Market Issuance Sales Agreement, dated October 2, 2023 (the “Sales Agreement”), by and between the Company and B. Riley Securities, Inc., Cantor Fitzgerald & Co. and H.C. Wainwright & Co., LLC, as Sales Agents (the “Sales Agents”). Under…

CEO — Dr. Kang Sun: Dr. Kang Sun is stepping down as CEO and becoming an Executive Advisor, while Mr. Tom Stepien has been appointed as the new CEO.

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

Chief Financial Officer — Ricardo C. Rodriguez: Mr. Ricardo C. Rodriguez was appointed as the new Chief Financial Officer, succeeding Ms. Sandra Wallach who retired.

Chief Financial Officer — Sandra Wallach: Ms. Wallach intends to retire from her position as Chief Financial Officer, with a smooth transition planned.

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

President — Tom Stepien: Mr. Tom Stepien was appointed as President of the Company, effective May 1, 2025.

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing.

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing. The contents…

and in the accompanying Exhibit 99.1 shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of any general incorporation language in such filing, unless expressly incorporated by specific reference in such filing.

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing On September 19, 2024, Amprius Technologies, Inc. (the “Company”) received a notice from the New York Stock Exchange (“NYSE”) that it is not in compliance with the continued listing criteria under Section 802.01C of the NYSE Listed Company Manual (the “Listing Rule”), because the average closing price of the Company's common stock was less than $1.00 over a consecutive 30 trading-day period. Un…

Director — Justin Mirro: Mr. Mirro resigned from his position as a member of the Board of Directors and from all of its committees.

Director — Mary Gustanski: Ms. Gustanski resigned from her position as a member of the Board of Directors.