AMPX / Amprius Technologies, Inc. - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

Amprius Technologies, Inc.
US ˙ NYSE ˙ US03214Q1085

Mga Batayang Estadistika
CIK 1899287
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Amprius Technologies, Inc.
SEC Filings (Chronological Order)
Halaman ini menyediakan daftar lengkap dan kronologis dari Pengajuan SEC, tidak termasuk pengajuan kepemilikan yang kami sediakan di tempat lain.
September 2, 2025 8-K

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): September 2, 2025 Amprius Technol

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): September 2, 2025 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commi

August 7, 2025 EX-99.1

March 2023 LETTER TO SHAREHOLDERS Q2 2025 Exhibit 99.1 Letter to Shareholders August 2025 - 1 - Breakthrough Technology Advancements Innovative technologies and breakthrough product performance are the foundations of Amprius’ business. Since debuting

exhibit991q22025letterto March 2023 LETTER TO SHAREHOLDERS Q2 2025 Exhibit 99.1 Letter to Shareholders August 2025 - 1 - Breakthrough Technology Advancements Innovative technologies and breakthrough product performance are the foundations of Amprius’ business. Since debuting our SiCore product platform in January 2024, we have relentlessly pushed the limits of lithium-ion performance. In April, we

August 7, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 7, 2025 EX-10.1

utside Director Compensation Policy, as amended on May 6, 2025

Exhibit 10.1 AMPRIUS TECHNOLOGIES, INC. OUTSIDE DIRECTOR COMPENSATION POLICY Amprius Technologies, Inc. (the “Company”) believes that the granting of equity and cash compensation to members of the Company’s Board of Directors (the “Board,” and members of the Board, “Directors”) represents an effective tool to attract, retain and reward Directors who are not employees of the Company (“Outside Direc

August 7, 2025 8-K

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): August 7, 2025 AMPRIUS TECHNOLOGI

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): August 7, 2025 AMPRIUS TECHNOLOGIES, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

June 18, 2025 8-K

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): June 12, 2025 Amprius Technologie

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): June 12, 2025 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

May 23, 2025 144

144

144 0001476220 XXXXXXXX LIVE 0001899287 Amprius Technologies, Inc. 001-41314 1180 Page Ave. Fremont CA 94538 8004258803 Kang Sun Officer Director Common Morgan Stanley Smith Barney LLC 1 New York Plaza, 38th fl. New York NY 10004 69786 169720 120967408 05/21/2025 NYSE Common 05/20/2025 Release of restricted stock units Issuer N 126192 05/20/2025 Compensation Y SHARES TO BE SOLD TO COVER WITHHOLDIN

May 23, 2025 144

144

144 0001940928 XXXXXXXX LIVE 0001899287 Amprius Technologies, Inc. 001-41314 1180 Page Ave. Fremont CA 94538 8004258803 Constantin Ionel Stefan Officer Common Morgan Stanley Smith Barney LLC 1 New York Plaza, 38th fl. New York NY 10004 20366 49530 120967408 05/21/2025 NYSE Common 05/20/2025 Release of restricted stock units Issuer N 52256 05/20/2025 Compensation Y SHARES TO BE SOLD TO COVER WITHHO

May 8, 2025 EX-10.1

Agreement for Tom Stepien, dated Apri

Exhibit 10.1 April 21, 2025 Tom Stepien [email protected] Dear Tom: This letter agreement (the “Agreement”) is entered into between Tom Stepien (“you”) and Amprius Technologies, Inc. (the “Company” or “we”). This Agreement shall be effective as of May 1, 2025 (the "Start Date"). The purpose of this Agreement is to set forth the terms and conditions of your employment with the Company. 1.Positi

May 8, 2025 EX-99.1

March 2023 LETTER TO SHAREHOLDERS Q1 2025 Letter to Shareholders May 2025 - 1 - Amprius has been producing commercial batteries since 2018, and we believe no other commercially available lithium-ion batteries on the market today can match the perform

March 2023 LETTER TO SHAREHOLDERS Q1 2025 Letter to Shareholders May 2025 - 1 - Amprius has been producing commercial batteries since 2018, and we believe no other commercially available lithium-ion batteries on the market today can match the performance of our silicon anode cells.

May 8, 2025 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 8, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 8, 2025 AMPRIUS TECHNOLOGIES, INC. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

April 25, 2025 DEFA14A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 25, 2025 ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 __________________________________ FORM 10-K __________________________________ (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-41314 AMPRIUS TECHNOL

April 25, 2025 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant x Filed by a party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 23, 2025 8-K

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 22, 2025 Amprius Technologi

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 22, 2025 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

March 20, 2025 EX-99.1

LETTER TO SHAREHOLDERS Q4 2024 March 2023 Exhibit 99.1 Letter to Shareholders March 2025 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perf

LETTER TO SHAREHOLDERS Q4 2024 March 2023 Exhibit 99.1 Letter to Shareholders March 2025 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perform at these levels today Disruptive Technology Advancements Innovative technologies and breakthrough product performance are the foundation of Ampriu

March 20, 2025 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Amprius Technologies, Inc.

March 20, 2025 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents Index to Consolidated Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 20, 2025 8-K

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): March 20, 2025 Amprius Technologi

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): March 20, 2025 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

March 20, 2025 EX-19.1

Insider Trading Policy

ampx-20241231xex191insid AMPRIUS TECHNOLOGIES, INC. INSIDER TRADING POLICY (Amended and Restated on January 15, 2025) A. POLICY OVERVIEW Amprius Technologies, Inc. (together with any subsidiaries, collectively the “Company”) has adopted this Insider Trading Policy (the “Policy”) to help you comply with the federal and state securities laws and regulations that govern trading in securities and to h

March 20, 2025 EX-21.1

List of Significant Subsidiaries

Exhibit 21.1 List of Significant Subsidiaries Name of Entity Ownership Jurisdiction Amprius Technologies Operating, Inc. 100% owned by Amprius Technologies, Inc. Delaware, USA

March 20, 2025 S-8

As filed with the Securities and Exchange Commission on March 20, 2025

As filed with the Securities and Exchange Commission on March 20, 2025 Registration No.

March 4, 2025 8-K

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): March 4, 2025 Amprius Technologie

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): March 4, 2025 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

March 4, 2025 EX-99.1

Amprius Technologies Reports Preliminary Fourth Quarter and Full Year 2024 Financial Results

Amprius Technologies Reports Preliminary Fourth Quarter and Full Year 2024 Financial Results FREMONT, Calif.

February 24, 2025 144

144

144 0001940928 XXXXXXXX LIVE 0001899287 Amprius Technologies, Inc. 001-41314 1180 Page Ave. Fremont CA 94538 8004258803 Constantin Ionel Stefan Officer Common Morgan Stanley Smith Barney LLC 1 New York Plaza, 38th fl. New York NY 10004 9066 28406.6 117671208 02/21/2025 NYSE Common 02/20/2025 Release of restricted stock units Issuer N 23411 02/20/2025 Compensation Y SHARES TO BE SOLD TO COVER WITHH

December 9, 2024 424B7

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3    Filed Pursuant to Rule 424(b)(7) (to Prospectus dated October 5, 2023)   Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated October 5, 2023, as supplemented by the prospectus supplements dated May 13, 2024 and October 23, 2024 (as so supplemented,

November 7, 2024 EX-99.1

LETTER TO SHAREHOLDERS Q3 2024 March 2023 Exhibit 99.1 Letter to Shareholders November 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can p

exhibit991q32024letterto LETTER TO SHAREHOLDERS Q3 2024 March 2023 Exhibit 99.1 Letter to Shareholders November 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perform at these levels today. Market Opportunity While Amprius high-energy and high-power batteries are for all electric mobi

November 7, 2024 8-K

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): November 7, 2024 Amprius Technolo

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): November 7, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

November 7, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 5, 2024 8-K

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): November 1, 2024 Amprius Technolo

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): November 1, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 29, 2024 EX-99.1

Amprius Technologies Reports Preliminary Third Quarter 2024 Financial Results

Amprius Technologies Reports Preliminary Third Quarter 2024 Financial Results FREMONT, Calif.

October 29, 2024 8-K

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): October 29, 2024 Amprius Technolo

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): October 29, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 28, 2024 SC 13D

AMPX / Amprius Technologies, Inc. / DIXON DONALD R - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No.  ) AMPRIUS TECHNOLOGIES, INC. (Name of Issuer) Common Stock, $0.0001 par value per share (Title of Class of Securities) 03214Q 108 (CUSIP Number) Donald R. Dixon 400 S El Camino Real #1050 San Mateo, CA 94402 (650) 289-4455 (Name, Address and Telephon

October 28, 2024 EX-99.A

Joint Filing Agreement

EX-99.A Exhibit A Joint Filing Agreement In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing with all other Reporting Persons (as such term is defined in the Schedule 13G referred to below) on behalf of each of them of a statement on Schedule 13G (including amendments thereto) with respect to the Commo

October 28, 2024 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 d893257dex991.htm EX-99.1 Exhibit 1 JOINT FILING AGREEMENT The undersigned hereby agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned, and any amendments thereto executed by the undersigned shall be filed on behalf of each of the undersigned without the necessity of filing any additional joint filing agreement. The undersigned acknowledge that

October 28, 2024 SC 13G

AMPX / Amprius Technologies, Inc. / SAIF Partners IV L.P. - SC 13G Passive Investment

SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* AMPRIUS TECHNOLOGIES, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 03214Q 108 (CUSIP Number) October 23, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the

October 25, 2024 SC 13D/A

AMPX / Amprius Technologies, Inc. / Amprius, Inc. - SC 13D/A Activist Investment

SC 13D/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 2)* Amprius Technologies, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 03214Q 108 (CUSIP Number) Dr. Kang Sun Amprius, Inc. 1180 Page Avenue Fremont, California 94538 (800) 425-8803 (Name, Address an

October 25, 2024 SC 13D

AMPX / Amprius Technologies, Inc. / Sun Kang - SC 13D Activist Investment

SC 13D UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. )* Amprius Technologies, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 03214Q 108 (CUSIP Number) Dr. Kang Sun Amprius, Inc. 1180 Page Avenue Fremont, California 94538 (800) 425-8803 (Name, Address and T

October 25, 2024 SC 13G

AMPX / Amprius Technologies, Inc. / SALZMAN ALAN E - SC 13G Passive Investment

SC 13G 1 d877393dsc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* AMPRIUS TECHNOLOGIES, INC. (Name of Issuer) Common Stock, $0.0001 par value (Title of Class of Securities) 03214Q 108 (CUSIP Number) October 23, 2024 (Date of Event Which Requires Filing of this Statement) Check the appro

October 23, 2024 S-8

As filed with the Securities and Exchange Commission on October 23, 2024

S-8 Table of Contents As filed with the Securities and Exchange Commission on October 23, 2024 Registration No.

October 23, 2024 8-K

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): October 23, 2024 Amprius Technolo

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): October 23, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 23, 2024 EX-10.2

Amprius, Inc. Second Equity Incentive Plan

AMPRIUS, INC. SECOND EQUITY INCENTIVE PLAN 1. Purposes of the Plan. The purposes of this Plan are: to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees, Directors and Consultants, and to promote the success of the Company’s business. The Plan permits the grant of Incentive Stock Options (subject to Section 21),

October 23, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 (Form Type) AMPRIUS TECHNOLOGIES, INC.

October 23, 2024 424B7

Amprius Technologies, Inc.

424B7 1 d895747d424b7.htm 424B7 PROSPECTUS SUPPLEMENT NO. 2    Filed Pursuant to Rule 424(b)(7) (to Prospectus dated October 5, 2023)   Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated October 5, 2023 (the “Prospectus”). Capitalized but undefined terms have the meanings ascrib

October 23, 2024 EX-10.3

Lock-Up Agreement, dated as of October 23, 2024, by and among Amprius Technologies, Inc. and the other parties thereto

LOCK-UP AGREEMENT This Lock-Up Agreement (this “Agreement”) is dated as of October 23, 2024 and is between Amprius Technologies, Inc.

September 20, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

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): September 19, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Comm

September 20, 2024 EX-99.1

Amprius Technologies Receives Continued Listing Standard Notice from NYSE

Amprius Technologies Receives Continued Listing Standard Notice from NYSE FREMONT, Calif.

September 12, 2024 8-K

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): September 6, 2024 Amprius Technol

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): September 6, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commi

August 14, 2024 8-K

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): August 12, 2024 Amprius Technolog

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): August 12, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commiss

August 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 8, 2024 EX-99.1

LETTER TO SHAREHOLDERS Q2 2024 March 2023 Exhibit 99.1 Letter to Shareholders August 2024 - 1 - Amprius’ high-performance battery families, SiMaxxTM and SiCoreTM, have attracted significant market attention and customer demand. The company’s priority

LETTER TO SHAREHOLDERS Q2 2024 March 2023 Exhibit 99.1 Letter to Shareholders August 2024 - 1 - Amprius’ high-performance battery families, SiMaxxTM and SiCoreTM, have attracted significant market attention and customer demand. The company’s priority today is to build additional manufacturing capacity to meet this significant customer demand for our products. Disruptive Technology Advancements As

August 8, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): August 8, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

July 24, 2024 EX-99.A5

Press release, dated July 24, 2024.

EX-99.(a)(5) Exhibit (a)(5) Amprius Announces Expiration and Results of Offer to Exchange Relating to its Private Placement Warrants FREMONT, Calif. – July 24, 2024 – Amprius Technologies, Inc. (“Amprius” or the “Company”) (NYSE: AMPX), a leader in next-generation lithium-ion batteries with its Silicon Anode Platform, today announced the expiration and results of its previously announced offer to

July 24, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 2) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company

SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 2) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE N/A Dr. Kang Sun C

July 8, 2024 424B3

Amprius Technologies, Inc. Offer to Exchange Private Warrants to Acquire Shares of Common Stock Amprius Technologies, Inc. Shares of Common Stock of Amprius Technologies, Inc. THE OFFER PERIOD (AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-280445 PROSPECTUS/OFFER TO EXCHANGE Amprius Technologies, Inc. Offer to Exchange Private Warrants to Acquire Shares of Common Stock of Amprius Technologies, Inc. for Shares of Common Stock of Amprius Technologies, Inc. THE OFFER PERIOD (AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., EASTERN TIME, ON JULY 23,

July 3, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 1) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company

SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 1) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE (Title of Class of

July 3, 2024 S-4/A

As filed with the Securities and Exchange Commission on July 3, 2024

Table of Contents As filed with the Securities and Exchange Commission on July 3, 2024 Registration No.

June 24, 2024 S-4

As filed with the Securities and Exchange Commission on June 24, 2024

Table of Contents As filed with the Securities and Exchange Commission on June 24, 2024 Registration No.

June 24, 2024 EX-99.1

(1)(B) Form of Letter of Transmittal (incorporated by reference to Exhibit 99.1 to the Registration Statement on Form S-4 filed with the SEC on June 24, 2024 (File No. 333-280445)).

Exhibit 99.1 LETTER OF TRANSMITTAL Offer To Exchange Private Warrants to Acquire Common Stock of Amprius Technologies, Inc. for Common Stock of Amprius Technologies, Inc. THE OFFER (AS DEFINED BELOW) AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., EASTERN DAYLIGHT TIME, ON JULY 23, 2024, OR SUCH LATER TIME AND DATE TO WHICH WE MAY EXTEND. PRIVATE WARRANTS OF THE COMPANY TENDERED PURSUANT TO THE OF

June 24, 2024 SC TO-I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company (Issuer) and Filin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE (Title of Class of Securities) N/A (CUSIP Numbe

June 24, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-4 (Form Type) Amprius Technologies, Inc.

June 24, 2024 EX-10.19

Tender and Support Agreement, dated June 24, 2024, by and among the Company, Justin Mirro and Kensington Capital Partners, LLC

Exhibit 10.19 Amprius Technologies, Inc. 1180 Page Avenue Fremont, CA 94538 June 24, 2024 Dear Justin Mirro and Kensington Capital Partners, LLC: This Tender and Support Agreement (this “Agreement”) confirms the agreement between Amprius Technologies, Inc., a Delaware corporation (the “Company”), and each of Justin Mirro and Kensington Capital Partners, LLC (“Kensington”) with respect to and in co

June 24, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Schedule TO (Form Type) Amprius Technologies, Inc.

June 13, 2024 EX-99.(A)(5)(D)

(5)(D) Press release, dated June 12, 2024.

Exhibit (a)(5)(D) CORRECTING and REPLACING Amprius Announces Final Results of Offer to Exercise Allowing Public and Private Warrants to be Exercised at a Reduced Price FREMONT, Calif.

June 13, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 3) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company

SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 3) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE PUBLIC WARRANTS TO

June 12, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 2) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 2) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE PUBLIC WARRANTS TO PURCHASE

June 12, 2024 EX-99.(A)(5)(D)

(5)(D) Press release, dated June 12, 2024.

Exhibit (a)(5)(D) Amprius Announces Final Results of Offer to Exercise Allowing Public and Private Warrants to be Exercised at a Reduced Price FREMONT, Calif.

June 6, 2024 8-K

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): June 6, 2024 Amprius Technologies

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): June 6, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

June 4, 2024 SC TO-I/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 1) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company

SC TO-I/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO (AMENDMENT NO. 1) TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC. (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE PUBLIC WARRANTS TO

June 3, 2024 CORRESP

June 3, 2024

Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304-1050 O: 650.

May 14, 2024 EX-4.1

First Amendment to Warrant Agreement, dated as of May 13, 2024, by and between the Company and Continental Transfer & Trust Company (incorporated by reference to Exhibit (d)(2) the Company’s Schedule TO filed with the SEC on May 13, 2024 (File No. 005-93595)

FIRST AMENDMENT TO WARRANT AGREEMENT This First Amendment to Warrant Agreement (this “Amendment”) is made as of May 13, 2024 between Amprius Technologies, Inc.

May 14, 2024 8-K

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): May 13, 2024 Amprius Technologies

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): May 13, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

May 13, 2024 424B3

Amprius Technologies, Inc.

424B3 PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated October 5, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated October 5, 2023 (the “Prospectus”) with the following information. Capitalized but undefined terms have the meanings ascrib

May 13, 2024 EX-99.(D)(2)

(2) First Amendment to Warrant Agreement, dated as of May 13, 2024, by and between the Company and Continental Transfer & Trust Company (incorporated by reference to Exhibit (d)(2) to the Tender Offer Statement on Schedule TO filed with the SEC on May 13, 2024 (File No. 005-93595)).

EX-99.(d)(2) Exhibit (d)(2) FIRST AMENDMENT TO WARRANT AGREEMENT This First Amendment to Warrant Agreement (this “Amendment”) is made as of May 13, 2024 between Amprius Technologies, Inc., a Delaware corporation (f/k/a Kensington Capital Acquisition Corp. IV, the “Company”), and Continental Stock Transfer & Trust Company (the “Warrant Agent”) and amends that certain Warrant Agreement, dated as of

May 13, 2024 EX-99.(A)(1)(E)

Form of Letter To Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99.(a)(1)(E) Exhibit (a)(1)(E) Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees OFFER TO EXERCISE WARRANTS TO PURCHASE COMMON STOCK AMPRIUS TECHNOLOGIES, INC. MAY 13, 2024 THE OFFER TO EXERCISE (AND ASSOCIATED WITHDRAWAL RIGHTS) WILL EXPIRE AT 5:00 P.M. (EASTERN TIME) ON JUNE 11, 2024 UNLESS THE OFFER PERIOD IS EXTENDED. To Brokers, Dealers, Commercial Banks, Tru

May 13, 2024 EX-99.(A)(5)(C)

(5)(C) Press release, dated May 13, 2024.

EX-99.(a)(5)(C) Exhibit (a)(5)(C) Amprius Announces Temporary Offer Allowing Public and Private Warrants to be Exercised at a Reduced Price FREMONT, Calif. — May 13, 2024 — Amprius Technologies, Inc. (“Amprius” or the “Company”) (NYSE: AMPX), a leader in next-generation lithium-ion batteries with its Silicon Anode Platform, today announced a temporary offer allowing its public and private warrants

May 13, 2024 EX-99.(D)(17)

(17) Waiver Agreement, dated May 13, 2024, by and between the Company and Justin Mirro (incorporated by reference to Exhibit (d)(17) to the Tender Offer Statement on Schedule TO filed with the SEC on May 13, 2024 (File No. 005-93595)).

EX-99.(d)(17) Exhibit (d)(17) Amprius Technologies, Inc. 1180 Page Avenue Fremont, CA 94538 May 13, 2024 Dear Justin Mirro: This Waiver Agreement (this “Agreement”) confirms the agreement between you and Amprius Technologies, Inc., a Delaware corporation (the “Company”), with respect to and in connection with the Company’s offer to holders of its outstanding (i) public warrants (the “Public Warran

May 13, 2024 EX-99.(A)(1)(B)

Offer to Exercise.

EX-99.(a)(1)(B) Exhibit (a)(1)(B) NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THE TRANSACTION CONTEMPLATED HEREIN; PASSED UPON THE MERITS OR FAIRNESS OF THE TRANSACTION; OR PASSED UPON THE ADEQUACY OR ACCURACY OF THE DISCLOSURE IN THIS DOCUMENT. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE. OFFER TO EXERCISE WARRANTS

May 13, 2024 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated October 5, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated October 5, 2023 (the “Prospectus”) with the following information. Capitalized but undefined terms have the meanings ascribed to

May 13, 2024 EX-99.(A)(1)(C)

Form of Election to Participate and Exercise Offering Warrants

EX-99.(a)(1)(C) Exhibit (a)(1)(C) ELECTION TO PARTICIPATE AND EXERCISE WARRANTS PURSUANT TO OFFER TO EXERCISE WARRANTS TO PURCHASE COMMON STOCK OF AMPRIUS TECHNOLOGIES, INC. THE OFFER (AND ASSOCIATED WITHDRAWAL RIGHTS) WILL EXPIRE AT 5:00 P.M. (EASTERN TIME) ON JUNE 11, 2024, UNLESS THE OFFER PERIOD IS EXTENDED. The Depository Agent for the Offer is: Continental Stock Transfer & Trust Company whos

May 13, 2024 SC TO-I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company (Issuer) and Filin

SC TO-I UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE TO TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934 AMPRIUS TECHNOLOGIES, INC (Name of Subject Company (Issuer) and Filing Person (Offeror)) PRIVATE WARRANTS TO PURCHASE COMMON STOCK AT AN EXERCISE PRICE OF $11.50 PER SHARE PUBLIC WARRANTS TO PURCHASE COMMON STOC

May 13, 2024 EX-99.(A)(1)(A)

Letter to Holders of Offering Warrants.

EX-99.(a)(1)(A) Exhibit (a)(1)(A) May 13, 2024 To the Holders of the Offering Warrants: This letter is to inform you that Amprius Technologies, Inc. (the “Company”) is offering to holders of its outstanding (i) public warrants (the “Public Warrants”) to purchase up to 29,268,236 shares of the Company’s common stock, $0.0001 par value per share (the “Common Stock”), and (ii) private warrants (the “

May 13, 2024 EX-99.(A)(1)(D)

Form of Notice of Withdrawal.

EX-99.(a)(1)(D) Exhibit (a)(1)(D) NOTICE OF WITHDRAWAL OF EXERCISE OF WARRANTS PURSUANT TO OFFER TO EXERCISE WARRANTS TO PURCHASE COMMON STOCK OF AMPRIUS TECHNOLOGIES, INC. THE OFFER (AND ASSOCIATED WITHDRAWAL RIGHTS) WILL EXPIRE AT 5:00 P.M. (EASTERN TIME) ON JUNE 11, 2024, UNLESS THE OFFER PERIOD IS EXTENDED. If mailing by first-class mail: To: Continental Stock Transfer & Trust Company Attn: Co

May 13, 2024 EX-99.(A)(1)(F)

Form of Letter Used by Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.

EX-99.(a)(1)(F) Exhibit (a)(1)(F) Letter to Clients OFFER TO EXERCISE WARRANTS TO PURCHASE COMMON STOCK AMPRIUS TECHNOLOGIES, INC. May 13, 2024 THE OFFER TO EXERCISE (AND ASSOCIATED WITHDRAWAL RIGHTS) WILL EXPIRE AT 5:00 P.M. (EASTERN TIME) ON JUNE 11, 2024 UNLESS THE OFFER PERIOD IS EXTENDED. To Our Clients: This letter is to inform you that Amprius Technologies, Inc. (the “Company”) is offering

May 13, 2024 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Calculation of Filling Fee Tables Schedule TO (Form Type) Amprius Technologies, Inc.

May 9, 2024 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 9, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 9, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

May 9, 2024 EX-99.1

LETTER TO SHAREHOLDERS Q1 2024 March 2023 Exhibit 99.1 Letter to Shareholders May 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perfor

LETTER TO SHAREHOLDERS Q1 2024 March 2023 Exhibit 99.1 Letter to Shareholders May 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perform at these levels today. Amprius’ high-performance battery families, SiMaxxTM and SiCoreTM, have attracted significant market attention and customer d

April 25, 2024 DEFA14A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 25, 2024 ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 __________________________________ FORM 10-K __________________________________ (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023 OR o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-04321 AMPRIUS TECHNOL

April 25, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant x Filed by a party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 1, 2024 8-K

Other Events

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 1, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

March 28, 2024 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Amprius Technologies, Inc.

March 28, 2024 EX-21.1

List of Significant Subsidiaries

Exhibit 21.1 List of Significant Subsidiaries Name of Entity Ownership Jurisdiction Amprius Technologies Operating, Inc. 100% owned by Amprius Technologies, Inc. Delaware, USA

March 28, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents Index to Consolidated Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 28, 2024 EX-97.1

ompensation Recovery Policy

Exhibit 97.1 AMPRIUS TECHNOLOGIES, INC. COMPENSATION RECOVERY POLICY As adopted on [ ] Amprius Technologies, Inc. (the “Company”) is committed to strong corporate governance. As part of this commitment, the Company’s Board of Directors (the “Board”) has adopted this clawback policy called the Compensation Recovery Policy (the “Policy”). The Policy is intended to further the Company’s pay-for-perfo

March 28, 2024 EX-4.6

Exhibit 4.6

Exhibit 4.6 DESCRIPTION OF CAPITAL STOCK The following description of securities of Amprius Technologies, Inc. (“us,” “our,” “we,” “Amprius,” or the “Company”) is a summary of the rights of our securities and certain provisions of our Certificate of Incorporation and Amended and Restated Bylaws (“Bylaws”). This summary does not purport to be complete and is qualified in its entirety by the provisi

March 28, 2024 S-8

As filed with the Securities and Exchange Commission on March 28, 2024

As filed with the Securities and Exchange Commission on March 28, 2024 Registration No.

March 21, 2024 EX-99.1

LETTER TO SHAREHOLDERS Q4 and Full Year 2023 March 2023 Exhibit 99.1 Letter to Shareholders March 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market

LETTER TO SHAREHOLDERS Q4 and Full Year 2023 March 2023 Exhibit 99.1 Letter to Shareholders March 2024 - 1 - Amprius has been in commercial battery production since 2018, and it is our belief that there are no other commercial batteries on the market that can perform at these levels today. Amprius’ high-performance battery families, SiMaxxTM and SiCoreTM, have attracted significant market attentio

March 21, 2024 8-K

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): March 21, 2024 Amprius Technologi

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): March 21, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

January 16, 2024 EX-10.1

Exclusive Supply Agreement dated November 28, 2023, by and between the Company and Berzelius (Nanjing) Co. Ltd

AMPRIUS TECHNOLOGIES, INC. EXCLUSIVE SUPPLY AGREEMENT This Exclusive Supply Agreement (this “Agreement”) is entered into as of November 28, 2023 (the “Effective Date”) by and between Amprius Technologies, Inc., a Delaware corporation, with its office at 1180 Page Ave., Fremont, CA 94538 (“Amprius”) and Berzelius (Nanjing) Co. Ltd., a Chinese corporation having offices at Feng Zhan Road 30, Buildin

January 16, 2024 8-K

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): January 16, 2024 Amprius Technolo

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): January 16, 2024 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

November 13, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 9, 2023 EX-99.1

LETTER TO SHAREHOLDERS Q3 Fiscal 2023 March 2023 Letter to Shareholders November 2023 - 1 - • Safety design features that enable us to pass the United States military’s benchmark nail penetration test Amprius’ high-performance batteries have attracte

LETTER TO SHAREHOLDERS Q3 Fiscal 2023 March 2023 Letter to Shareholders November 2023 - 1 - • Safety design features that enable us to pass the United States military’s benchmark nail penetration test Amprius’ high-performance batteries have attracted market attention and customer demand.

November 9, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 9, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 27, 2023 RW

October 27, 2023

RW October 27, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Request for Withdrawal of Amprius Technologies, Inc. Registration Statement on Form S-4 File No. 333-272466 Ladies and Gentlemen: On behalf of Amprius Technologies, Inc., a Delaware corporation (the “Company”), the undersig

October 27, 2023 POS AM

As filed with the Securities and Exchange Commission on October 27, 2023

POS AM As filed with the Securities and Exchange Commission on October 27, 2023 Registration No.

October 23, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 11 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compa

October 23, 2023 8-K

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): October 21, 2023 Amprius Technolo

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): October 21, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 10, 2023 424B3

Up to $100,000,000 Amprius Technologies, Inc. Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-274834 PROSPECTUS SUPPLEMENT Up to $100,000,000 Amprius Technologies, Inc. Common Stock We have entered into an At Market Issuance Sales Agreement, dated October 2, 2023, (the “Sales Agreement”), with B. Riley Securities, Inc. (“B. Riley Securities”), Cantor Fitzgerald & Co. (“Cantor”) and H.C. Wainwright & Co., LLC (“Wainwrig

October 5, 2023 CORRESP

October 5, 2023

October 5, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549 Re: Amprius Technologies, Inc. Registration Statement on Form S-3 (File No. 333-274834) Acceleration Request Requested Date: Tuesday, October 10, 2023 Requested Time: 4:30 P.M. Eastern Time Ladies and Gentlemen: Pursuant to Rule 461 und

October 3, 2023 POS AM

Risk Factors

POS AM Table of Contents As filed with the Securities and Exchange Commission on October 2, 2023 Registration No.

October 3, 2023 EX-1.2

At Market Issuance Sales Agreement, dated October 2, 2023, by and among the registrant, B. Riley Securities, Inc., Cantor Fitzgerald & Co. and H.C. Wainwright & Co., LLC

Exhibit 1.2 AMPRIUS TECHNOLOGIES, INC. Common Stock (par value $0.0001 per share) At Market Issuance Sales Agreement October 2, 2023 B. Riley Securities, Inc. 299 Park Avenue, 21st Floor New York, NY 10171 Cantor Fitzgerald & Co. 499 Park Avenue New York, NY 10022 H.C. Wainwright & Co., LLC 430 Park Avenue New York, NY 10022 Ladies and Gentlemen: Amprius Technologies, Inc., a Delaware corporation

October 3, 2023 8-K

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): October 2, 2023 Amprius Technolog

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): October 2, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commiss

October 3, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Post-Effective Amendment No. 1 to Form S-1 on Form S-3 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Calculation of Filing Fee Tables Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maximum Aggregat

October 3, 2023 S-3

As filed with the Securities and Exchange Commission on October 2, 2023

S-3 Table of Contents As filed with the Securities and Exchange Commission on October 2, 2023 Registration No.

October 3, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-3 (Form Type) Amprius Technologies, Inc.

October 3, 2023 POS AM

As filed with the Securities and Exchange Commission on October 2, 2023

Table of Contents As filed with the Securities and Exchange Commission on October 2, 2023 Registration No.

October 3, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 10 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compa

October 3, 2023 EX-4.3

Form of Indenture

EX-4.3 Exhibit 4.3 AMPRIUS TECHNOLOGIES, INC. INDENTURE Dated as of     , 20  [     ] Trustee TABLE OF CONTENTS    Page ARTICLE I DEFINITIONS AND INCORPORATION BY REFERENCE 1 Section 1.1 Definitions 1 Section 1.2 Other Definitions 4 Section 1.3 Incorporation by Reference of Trust Indenture Act 5 Section 1.4 Rules of Construction 5 ARTICLE II THE SECURITIES 5 Section 2.1 Issuable in Series 5 Sectio

September 21, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 9 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

September 21, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated June 26, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-272466 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated June 26, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities and

September 21, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 9 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

September 21, 2023 424B3

PROPOSED MERGERS YOUR VOTE IS VERY IMPORTANT

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-272466 PROPOSED MERGERS YOUR VOTE IS VERY IMPORTANT To the Stockholders of Amprius Technologies, Inc. and Amprius, Inc.: Amprius Technologies, Inc., which we refer to as “Amprius,” and Amprius, Inc., which we refer to as “Holdco,” have entered into an Agreement and Plan of Merger and Reorganization, which we refer to as the “m

September 21, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 9 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

September 21, 2023 8-K

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): September 21, 2023 Amprius Techno

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): September 21, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Comm

August 11, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001

August 11, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 8 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities a

August 11, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 8 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities a

August 11, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 8 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

August 10, 2023 EX-99.1

LETTER TO SHAREHOLDERS Q2 Fiscal 2023 March 2023 Letter to Shareholders August 2023 - 1 - Company Overview Amprius develops and manufactures ultra-high energy density lithium-ion batteries based on our proprietary silicon anode technology. Our batter

ampxq22023lettertoshareh LETTER TO SHAREHOLDERS Q2 Fiscal 2023 March 2023 Letter to Shareholders August 2023 - 1 - Company Overview Amprius develops and manufactures ultra-high energy density lithium-ion batteries based on our proprietary silicon anode technology.

August 10, 2023 8-K

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): August 10, 2023 Amprius Technolog

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): August 10, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commiss

July 25, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

July 25, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

July 25, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

July 25, 2023 8-K

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): July 24, 2023 Amprius Technologie

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): July 24, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

June 27, 2023 424B3

PROPOSED MERGERS YOUR VOTE IS VERY IMPORTANT

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-272466 PROPOSED MERGERS YOUR VOTE IS VERY IMPORTANT To the Stockholders of Amprius Technologies, Inc. and Amprius, Inc.: Amprius Technologies, Inc., which we refer to as “Amprius,” and Amprius, Inc., which we refer to as “Holdco,” have entered into an Agreement and Plan of Merger and Reorganization, which we refer to as the “m

June 22, 2023 CORRESP

June 22, 2023

CORRESP June 22, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-4 (File No. 333-272466) Acceleration Request Requested Date: Monday, June 26, 2023 Requested Time: 4:30 P.M. Eastern Time Ladies and Gentlemen: Pursuant to Rule

June 21, 2023 S-4/A

As filed with the Securities and Exchange Commission on June 20, 2023

S-4/A Table of Contents As filed with the Securities and Exchange Commission on June 20, 2023 Registration Statement No.

June 21, 2023 EX-99.3

Consent of Houlihan Lokey Capital, Inc.

EX-99.3 5 d460617dex993.htm EX-99.3 Exhibit 99.3 WRITTEN CONSENT FOR SEC FILING CONSENT OF HOULIHAN LOKEY CAPITAL, INC. June 20, 2023 Amprius Technologies, Inc. 1180 Page Avenue Fremont, CA 94538 Attn: Sandra Wallach, Chief Financial Officer Re: Amendment No. 1 to the Registration Statement on Form S-4 of Amprius Technologies, Inc., (File No. 333-272466) (the “Registration Statement”) Dear Ms. Wal

June 21, 2023 EX-99.1

Form of Proxy Card

EX-99.1 Exhibit 99.1 AMPRIUS TECHNOLOGIES, INC. 1180 PAGE AVE FREMONT, CA 94538 VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time on July 25, 2023. Have your proxy card in hand when you access the web site and follow the instruct

June 21, 2023 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Form S-4 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Calculation of Filing Fee Tables* Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title(1) Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amou

June 15, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

June 15, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

June 15, 2023 8-K

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): June 13, 2023 Amprius Technologie

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): June 13, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

June 15, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

June 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

June 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

June 9, 2023 8-K

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): June 1, 2023 Amprius Technologies

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): June 1, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

June 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

June 7, 2023 EX-99.3

Consent of Houlihan Lokey Capital, Inc.

EX-99.3 Exhibit 99.3 WRITTEN CONSENT FOR SEC FILING CONSENT OF HOULIHAN LOKEY CAPITAL, INC. June 6, 2023 Amprius Technologies, Inc. 1180 Page Avenue Fremont, CA 94538 Attn: Sandra Wallach, Chief Financial Officer Re: Registration Statement on Form S-4 of Amprius Technologies, Inc., filed on June 6, 2023 (the “Registration Statement”) Dear Ms. Wallach: Reference is made to our opinion letter (“opin

June 7, 2023 S-4

Power of Attorney (included in the signature page to this Registration Statement on Form S-4)

Table of Contents As filed with the Securities and Exchange Commission on June 6, 2023 Registration Statement No.

June 7, 2023 EX-4.6

Warrant to Purchase Stock, dated December 13, 2017, between Holdco and Silicon Valley Bank

EX-4.6 Exhibit 4.6 THIS WARRANT AND THE SHARES ISSUABLE HEREUNDER HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “ACT”), OR THE SECURITIES LAWS OF ANY STATE AND, EXCEPT AS SET FORTH IN SECTIONS 5.3 AND 5.4 BELOW, MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS AND UNTIL REGISTERED UNDER SAID ACT AND LAWS OR IN FORM AND SUBSTANCE SATISFACTORY TO THE COM

June 7, 2023 EX-10.21

Amprius, Inc. 2008 Stock Plan

EX-10.21 Exhibit 10.21 AMPRIUS, INC. 2008 STOCK PLAN 1. Purposes of the Plan. The purposes of this Plan are to attract and retain the best available personnel for positions of substantial responsibility, to provide additional incentive to Employees, Directors and Consultants and to promote the success of the Company’s business. The Plan permits the grant of Options and Restricted Stock as the Admi

June 7, 2023 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Form S-4 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Calculation of Filing Fee Tables* Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title(1) Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amou

June 7, 2023 EX-21.1

List of Subsidiaries

EX-21.1 Exhibit 21.1 List of Subsidiaries Name of Entity Ownership Jurisdiction Amprius Technologies Operating, Inc. 100% owned by Amprius Technologies, Inc. Delaware, USA Combine Merger Sub, Inc. 100% owned by Amprius Technologies, Inc. Delaware, USA Combine Merger Sub, LLC 100% owned by Amprius Technologies, Inc. Delaware, USA

May 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities a

May 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities a

May 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Quarterly Report on Form 10-Q, filed with the Securities a

May 12, 2023 SC 13D/A

AMPX / Amprius Technologies Inc / Amprius, Inc. - SC 13D/A Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D UNDER THE SECURITIES EXCHANGE ACT OF 1934 (Amendment No. 1)* Amprius Technologies, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 03214Q 108 (CUSIP Number) Dr. Kang Sun Amprius, Inc. 1180 Page Avenue Fremont, California 94538 (800) 425-8803 (Name, Address and Telepho

May 11, 2023 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 00

May 10, 2023 EX-2.2

2023, by and among Amprius Technologies, Inc. and each of the parties named therein

Execution Version PUBCO SUPPORT AGREEMENT This Pubco Support Agreement dated as of May 9, 2023 (as it may be amended from time to time, this “Agreement”) is among Amprius Technologies, Inc.

May 10, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

May 10, 2023 EX-2.1

Agreement and Plan of Merger and Reorganization, dated May 9, 2023, by and among Amprius Technologies, Inc., Amprius, Inc., Combine Merger Sub, Inc. and Combine Merger Sub, LLC

Execution Version AGREEMENT AND PLAN OF MERGER AND REORGANIZATION among Amprius Technologies, Inc.

May 10, 2023 8-K

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): May 10, 2023 Amprius Technologies

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): May 10, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

May 10, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

May 10, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

May 10, 2023 EX-99.1

LETTER TO SHAREHOLDERS Q1 Fiscal 2023 March 2023 Letter to Shareholders May 2023 - 1 - Company Overview Amprius Technologies develops and manufactures ultra-high energy density lithium-ion batteries based on our proprietary silicon anode technology.

ampxq12023lettertoshareh LETTER TO SHAREHOLDERS Q1 Fiscal 2023 March 2023 Letter to Shareholders May 2023 - 1 - Company Overview Amprius Technologies develops and manufactures ultra-high energy density lithium-ion batteries based on our proprietary silicon anode technology.

May 10, 2023 8-K

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): May 9, 2023 Amprius Technologies,

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): May 9, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commission

May 10, 2023 EX-2.3

Form of Holdco Support Agreement, dated May 9, 2023

Exhibit Version STOCKHOLDER SUPPORT AGREEMENT This Stockholder Support Agreement dated as of May 9, 2023 (as it may be amended from time to time, this “Agreement”) is among Amprius, Inc.

May 10, 2023 EX-10.1

Amendment No. 1 to Registration Rights Agreement, dated May 9, 2023, by and among Amprius Technologies, Inc., Amprius, Inc. and the Original Holder

Execution Version AMENDMENT NO. 1 TO REGISTRATION RIGHTS AGREEMENT This Amendment No. 1 (this “Amendment”) to the Registration Rights Agreement, dated September 14, 2022 (the “Registration Rights Agreement”), is made and entered into as of May 9, 2023, by and among Amprius Technologies, Inc., a Delaware corporation (the “Company”), Kensington Capital Sponsor IV LLC, a Delaware limited liability co

April 28, 2023 ARS

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 __________________________________ FORM 10-K __________________________________ (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

ampx-20221231xfinal33023 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 27, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. with the information contained in our Proxy Statement on Sch

April 27, 2023 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant x Filed by a party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) x Definitive Proxy State

April 27, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Proxy Statement on Schedule 14A and Current Report on Form

April 27, 2023 DEFA14A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 Filed by the Registrant ☒ Filed by a party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy State

April 27, 2023 8-K

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 25, 2023 Amprius Technologi

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 25, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

April 27, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Proxy Statement on Schedule 14A and Current Report on Form

April 19, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 11, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

April 19, 2023 EX-10.1

Lease Agreement, dated April 15, 2023, by and between Amprius Technologies, Inc. and Starboard Platform Brighton JV LLC

LEASE THIS LEASE AGREEMENT is made and entered into as of the date set forth in Section 1 “Definitions” (this lease agreement, together with all amendments and supplements hereto, this "Lease"), by and between STARBOARD PLATFORM BRIGHTON JV LLC, a Delaware limited liability company (together with any successor or assigns, hereinafter called the "Landlord"), and AMPRIUS TECHNOLOGIES, INC.

April 19, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated April 12, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-271149 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in our prospectus dated April 12, 2023 (the “Prospectus”) with the information contained in our Current Report on Form 8-K, filed with the Securities and

April 19, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated April 11, 2023) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated April 11, 2023 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Compan

April 19, 2023 8-K

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 15, 2023 Amprius Technologi

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 15, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

April 11, 2023 424B3

16,409,222 Shares of Common Stock

424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 16,409,222 Shares of Common Stock This prospectus relates to the offer and resale of up to 16,409,222 shares of our common stock, par value $0.0001 per share (“Common Stock”), by B. Riley Principal Capital II, LLC (“BRPC II” or the “Selling Stockholder”). The shares of Common Stock to which this prospectus relates

April 11, 2023 424B3

104,820,694 Shares of Common Stock 16,400,000 Private Warrants 6,535,000 Public Warrants

424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 104,820,694 Shares of Common Stock 16,400,000 Private Warrants 6,535,000 Public Warrants This prospectus relates to the registration of the Common Stock, par value $0.0001 per share, of Amprius Technologies, Inc. (the “Common Stock”) and warrants to purchase shares of Common Stock as described herein. This prospec

April 10, 2023 CORRESP

April 10, 2023

April 10, 2023 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-1 (File No. 333-271149) Acceleration Request Requested Date: Wednesday, April 12, 2023 Requested Time: 4:30 P.M. Eastern Time Ladies and Gentlemen: Pursuant to Rule 461

April 5, 2023 S-4 POS

As filed with the Securities and Exchange Commission on April 5, 2023

S-4 POS As filed with the Securities and Exchange Commission on April 5, 2023 Registration Statement No.

April 5, 2023 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 5 d490458dexfilingfees.htm EX-FILING FEES Exhibit 107 Form S-1 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Calculation of Filing Fee Tables Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered(1) Proposed Maximum Offering Price Per Unit Maxim

April 5, 2023 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Table Post-Effective Amendment No.

April 5, 2023 S-1

As filed with the Securities and Exchange Commission on April 5, 2023 Registration No. 333- SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT Under The Securities Act of 1933 AMPRIUS TECHNOLOGIES, INC. (Exact n

Table of Contents As filed with the Securities and Exchange Commission on April 5, 2023 Registration No.

April 5, 2023 POS AM

As filed with the Securities and Exchange Commission on April 5, 2023 Registration No. 333-267691 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-1 REGISTRATION STATEMENT Under The Securities Act of

Table of Contents As filed with the Securities and Exchange Commission on April 5, 2023 Registration No.

April 5, 2023 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 4 d485140dexfilingfees.htm EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables Post-Effective Amendment No. 1 to Form S-1 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered(1) Proposed Max

April 5, 2023 POS AM

As filed with the Securities and Exchange Commission on April 5, 2023 Registration No. 333-267683 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-1 REGISTRATION STATEMENT Under The Securities Act of

Table of Contents As filed with the Securities and Exchange Commission on April 5, 2023 Registration No.

March 31, 2023 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Tables Form S-8 (Form Type) Amprius Technologies, Inc.

March 31, 2023 S-8

As filed with the Securities and Exchange Commission on March 30, 2023

As filed with the Securities and Exchange Commission on March 30, 2023 Registration No.

March 30, 2023 EX-21.1

List of Subsidiaries (incorporated by reference to Exhibit 21.1 to the Company’s Annual Report on Form 10-K (File No. 001-41314) filed with the SEC on March 30, 2023)

Exhibit 21.1 List of Subsidiaries Name of Entity Ownership Jurisdiction Amprius Technologies Operating, Inc. 100% owned by Amprius Technologies, Inc. Delaware, USA

March 30, 2023 EX-10.16

First Amendment to Lease Agreement, dated January 4, 2023, between the Company and Los Altos Fields, LLC

Exhibit 10.16 FIRST AMENDMENT TO LEASE AGREEMENT The First Amendment to Industrial Lease ("Amendment"), is made and entered into this 4th , day of January, 2023, by and between LOS ALTOS FIELDS, LLC, a California limited liability company ("Landlord"), and AMPRIUS TECHNOLOGIES, INC., a Delaware corporation ("Tenant"). RECITALS A.Landlord and Amprius, Inc., a Delaware corporation ("Amprius") entere

March 30, 2023 EX-4.6

Exhibit 4.6

Exhibit 4.6 DESCRIPTION OF CAPITAL STOCK The following description of securities of Amprius Technologies, Inc. (“us,” “our,” “we,” “Amprius,” or the “Company”) is a summary of the rights of our securities and certain provisions of our Certificate of Incorporation and Amended and Restated Bylaws (“Bylaws”). This summary does not purport to be complete and is qualified in its entirety by the provisi

March 30, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

Table of Contents Index to Consolidated Financial Statements UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

March 23, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated December 2, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 2, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Co

March 23, 2023 EX-99.1

LETTER TO SHAREHOLDERS Q4 Fiscal 2022 March 2023 Letter to Shareholders March 2023 Company Overview Amprius Technologies develops and manufactures ultra-high energy density lithium-ion batteries based on our propriety silicon anode technology. Today,

ampx-20230323xexhibit991 LETTER TO SHAREHOLDERS Q4 Fiscal 2022 March 2023 Letter to Shareholders March 2023 Company Overview Amprius Technologies develops and manufactures ultra-high energy density lithium-ion batteries based on our propriety silicon anode technology.

March 23, 2023 8-K

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): March 21, 2023 Amprius Technologi

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): March 21, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissi

March 23, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 7 (to Prospectus dated September 1, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information c

March 23, 2023 EX-3.1

Amended and Restated Bylaws of Amprius Technologies, Inc.

Exhibit 3.1 AMENDED AND RESTATED BYLAWS OF AMPRIUS TECHNOLOGIES, INC. (effective as of March 21, 2023) TABLE OF CONTENTS Page ARTICLE I - CORPORATE OFFICES 1 1.1 REGISTERED OFFICE 1 1.2 OTHER OFFICES 1 ARTICLE II - MEETINGS OF STOCKHOLDERS 1 2.1 PLACE OF MEETINGS 1 2.2 ANNUAL MEETING 1 2.3 SPECIAL MEETING 1 2.4 ADVANCE NOTICE PROCEDURES 2 2.5 NOTICE OF STOCKHOLDERS’ MEETINGS 9 2.6 QUORUM 9 2.7 ADJ

March 23, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated December 27, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 27, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the

March 9, 2023 8-K

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): March 6, 2023 Amprius Technologie

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): March 6, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commissio

March 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated December 2, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 2, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Co

March 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 6 (to Prospectus dated September 1, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information c

March 9, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated December 27, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 27, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the

February 7, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 5 (to Prospectus dated September 1, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information c

February 7, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated December 2, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 2, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Co

February 7, 2023 8-K

Other Events

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): February 7, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

February 7, 2023 424B3

Amprius Technologies, Inc.

424B3 1 ampriustechnologies424b3.htm 424B3 PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated December 27, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 27, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Compa

January 12, 2023 8-K

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): January 7, 2023 Amprius Technolog

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): January 7, 2023 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commiss

January 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated December 27, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 27, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the

January 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 1 (to Prospectus dated December 2, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-267683 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the prospectus dated December 2, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information contained in the Co

January 12, 2023 424B3

Amprius Technologies, Inc.

PROSPECTUS SUPPLEMENT NO. 4 (to Prospectus dated September 1, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the information c

December 27, 2022 424B3

16,825,366 Shares of Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No. 333-267691 16,825,366 Shares of Common Stock This prospectus relates to the offer and resale of up to 16,825,366 shares of our common stock, par value $0.0001 per share (?Common Stock?), by B. Riley Principal Capital II, LLC (?BRPC II? or the ?Selling Stockholder?). The shares of Common Stock to which this prospectus relates have

December 27, 2022 S-1/A

As filed with the Securities and Exchange Commission on December 27, 2022

Part II Filing As filed with the Securities and Exchange Commission on December 27, 2022 Registration No.

December 22, 2022 CORRESP

December 22, 2022

CORRESP 1 filename1.htm December 22, 2022 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-1 (File No. 333-267691) Acceleration Request Requested Date: Tuesday, December 27, 2022 Requested Time: 4:30 P.M. Eastern Standard Time Ladie

December 5, 2022 424B3

105,680,194 Shares of Common Stock 16,400,000 Private Warrants 6,535,000 Public Warrants

424B3 Table of Contents Filed Pursuant to Rule 424(b)(3) File No. 333-267683 105,680,194 Shares of Common Stock 16,400,000 Private Warrants 6,535,000 Public Warrants This prospectus relates to the registration of the Common Stock, par value $0.0001 per share, of Amprius Technologies, Inc. (the “Common Stock”) and warrants to purchase shares of Common Stock as described herein. This prospectus rela

December 2, 2022 CORRESP

December 2, 2022

CORRESP 1 filename1.htm December 2, 2022 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-1 (File No. 333-267691) Withdrawal of Acceleration Request Ladies and Gentlemen: Amprius Technologies, Inc. (the “Company”) hereby respectfull

November 29, 2022 CORRESP

November 29, 2022

November 29, 2022 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-1 (File No. 333-267683) Acceleration Request Requested Date: Thursday, December 1, 2022 Requested Time: 4:31 P.M. Eastern Standard Time Ladies and Gentlemen: Pursuan

November 29, 2022 CORRESP

November 29, 2022

November 29, 2022 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, D.C. 20549-3720 Re: Amprius Technologies, Inc. Registration Statement on Form S-1 (File No. 333-267691) Acceleration Request Requested Date: Thursday, December 1, 2022 Requested Time: 4:30 P.M. Eastern Standard Time Ladies and Gentlemen: Pursuan

November 16, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 (Form Type) AMPRIUS TECHNOLOGIES, INC.

November 16, 2022 S-8

Power of Attorney (included on the signature page hereto).

S-8 Table of Contents As filed with the Securities and Exchange Commission on November 16, 2022 Registration No.

November 16, 2022 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 3 d377019dexfilingfees.htm EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables S-1 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit(2) Maximu

November 16, 2022 EX-99.1

Report of Independent Registered Public Accounting Firm

Exhibit 99.1 Report of Independent Registered Public Accounting Firm To the Stockholders and the Board of Directors of Amprius Technologies, Inc. (a carve-out of Amprius, Inc.) Opinion on the Financial Statements We have audited the accompanying balance sheets of Amprius Technologies, Inc. (a carve-out of Amprius, Inc.) (the Company) as of December 31, 2021 and 2020, the related statements of oper

November 16, 2022 EX-FILING FEES

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table S-1 (Form Type) Amprius Technologies, Inc.

November 16, 2022 424B3

Amprius Technologies, Inc.

Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 PROSPECTUS SUPPLEMENT NO. 3 (to Prospectus dated September 1, 2022) Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the ?Prospectus?) filed by Amprius Technologies, Inc. (the ?Company?) with the information c

November 16, 2022 CORRESP

November 16, 2022

Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304-1050 o: 650.

November 16, 2022 CORRESP

November 16, 2022

CORRESP 1 filename1.htm Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304-1050 O: 650.493.9300 F: 650.493.6811 November 16, 2022 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance Office of Manufacturing 100 F Street, N.E. Washington, DC 20549-3720 Attn: Erin Donahue Erin Purnell Re: Amprius Technologies, Inc. Am

November 16, 2022 S-1/A

As filed with the Securities and Exchange Commission on November 16, 2022 Registration No. 333-267691 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 2 to FORM S-1 REGISTRATION STATEMENT Under The Securities Act of 1933 AMPRIU

Table of Contents As filed with the Securities and Exchange Commission on November 16, 2022 Registration No.

November 16, 2022 8-K/A

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of report (Date of earliest event reported): September 14, 2022 Amprius Technologies, Inc. (Exact Name of Registrant as Specified in Charter) Delaware 001-41314 98-1591811 (State or other jurisdiction of inco

November 16, 2022 S-1/A

As filed with the Securities and Exchange Commission on November 16, 2022 Registration No. 333-267683 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 2 to FORM S-1 REGISTRATION STATEMENT Under The Securities Act of 1933 AMPRIU

Table of Contents As filed with the Securities and Exchange Commission on November 16, 2022 Registration No.

November 14, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file numbe

November 14, 2022 424B3

Amprius Technologies, Inc.

Table of Contents PROSPECTUS SUPPLEMENT NO. 2 (to Prospectus dated September 1, 2022) Filed Pursuant to Rule 424(b)(3) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the ?Prospectus?) filed by Amprius Technologies, Inc. (the ?Company?) with

November 10, 2022 EX-99.1

LETTER TO SHAREHOLDERS Q3 Fiscal 2022 November 2022

Exhibit 99.1 LETTER TO SHAREHOLDERS Q3 Fiscal 2022 November 2022 Letter to Shareholders November 2022 Dear Shareholders, We are pleased to share our Q3 2022 financial results and operational highlights with you today. Our production capability is expanding, our battery performance is unmatched in the current market, and we have several blue-chip customers, among many others who are interested in w

November 10, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 10, 2022 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commi

October 25, 2022 EX-FILING FEES

Filing Fee Table

EX-FILING FEES 4 d320485dexfilingfees.htm EX107 Exhibit 107 Calculation of Filing Fee Table S-1 (Form Type) Amprius Technologies, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1—Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation Rule Amount to be Registered Proposed Maximum Offering Price Per Unit Proposed Maximum Aggregate Offering

October 25, 2022 S-1/A

As filed with the Securities and Exchange Commission on October 24, 2022

S-1/A Table of Contents As filed with the Securities and Exchange Commission on October 24, 2022 Registration No.

October 25, 2022 EX-FILING FEES

Filing Fee Table

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables S-1 (Form Type) Amprius Technologies, Inc.

October 25, 2022 S-1/A

As filed with the Securities and Exchange Commission on October 24, 2022

S-1/A Table of Contents As filed with the Securities and Exchange Commission on October 24, 2022 Registration No.

October 24, 2022 CORRESP

October 24, 2022

Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304-1050 O: 650.

October 24, 2022 CORRESP

October 24, 2022

Wilson Sonsini Goodrich & Rosati Professional Corporation 650 Page Mill Road Palo Alto, California 94304-1050 O: 650.

October 20, 2022 424B3

Amprius Technologies, Inc.

424B3 PROSPECTUS SUPPLEMENT NO. 1 Filed Pursuant to Rule 424(b)(3) (to Prospectus dated September 1, 2022) Registration No. 333-265740 Amprius Technologies, Inc. This prospectus supplement is being filed to update and supplement the information contained in the proxy statement/prospectus dated September 1, 2022 (the “Prospectus”) filed by Amprius Technologies, Inc. (the “Company”) with the informa

October 20, 2022 8-K

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): October 19, 2022 Amprius Technolo

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): October 19, 2022 Amprius Technologies, Inc. (Exact name of Registrant as Specified in Its Charter) Delaware 001-41314 98-1591811 (State or Other Jurisdiction of Incorporation) (Commis

October 7, 2022 SC 13G/A

AMPX / Amprius Technologies Inc / Wealthspring Capital LLC - SC 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1) Amprius Technologies, Inc. (Name of Issuer) Common Stock, par value $0.0001 per share (Title of Class of Securities) 03214Q 108 (CUSIP Number) September 14, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designat

September 30, 2022 S-1

Power of Attorney (included in the signature page to this Registration Statement on Form S-1)

Table of Contents As filed with the Securities and Exchange Commission on September 30, 2022 Registration No.

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