AMPX

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · derivative · entry 9

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 180,802

Underlying: Common stock · 27,463 shares

Expires 2027-12-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · derivative · entry 8

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock · 727,950 shares

Expires 2027-03-15

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · derivative · entry 7

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock · 202,934 shares

Expires 2026-12-14

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · nonDerivative · entry 5

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,472,306

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

F3 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $10.19 to $11.30, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · nonDerivative · entry 4

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,472,306

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

F2 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · nonDerivative · entry 3

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,430,653

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

F2 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · nonDerivative · entry 2

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,403,190

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

F2 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000018 · wk-form4_1763592590.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,675,240

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · kind: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.

F2 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001920996-25-000010 · wk-form4_1759958161.xml · nonDerivative · entry 1

RODRIGUEZ RICARDO C. · CIK 0001920996 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 200,000

F1 · shares: The securities are represented by restricted stock units granted on October 6, 2025. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on November 20, 2026 and the remainder will vest quarterly over three years thereafter, on each February 20, May 20, August 20 and November 20, subject to the reporting person's continued service on each such date, until the award is fully vested on November 20, 2029.

SEC source: 0001940928-25-000014 · wk-form4_1756166640.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 846,975

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $6.78 to $6.91, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 637,953 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000016 · wk-form4_1756166369.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,472,306

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $6.78 to $6.91, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 1,411,769 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

F4 · balance_after: On June 10, 2025, the reporting person transferred 274,275 shares of the issuer's common stock, which were previously held directly by the reporting person, to the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees.

SEC source: 0001698362-25-000013 · wk-form4_1756166528.xml · nonDerivative · entry 1

Wallach Sandra · CIK 0001698362 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,005,275

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $6.78 to $6.91, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 803,914 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001628280-25-031979 · wk-form4_1750206454.xml · nonDerivative · entry 1

DIXON DONALD R · CIK 0001045434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 394,656

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

F2 · balance_after: Includes 44,444 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

F3 · balance_after: Consists of 225,212 shares that the reporting person received in a pro rata distribution by Amprius, Inc. ("Amprius Holdings"), which distribution was exempt under Rule 16a-9, in connection with Amprius Holdings' dissolution.

F4 · balance_after: On May 7, 2025, the reporting person transferred 17,895 shares of the issuer's common stock, which were previously held directly by the reporting person, to the The Dixon Revocable Trust, for which the reporting person and his spouse are co-trustees.

SEC source: 0001628280-25-031974 · wk-form4_1750205879.xml · nonDerivative · entry 1

Chu Steven · CIK 0001296381 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 189,839

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

F2 · balance_after: Includes 44,444 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001628280-25-031975 · wk-form4_1750205924.xml · nonDerivative · entry 1

BAYLESS KATHLEEN A · CIK 0001230569 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 205,697

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

F2 · balance_after: Includes 56,031 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001628280-25-031976 · wk-form4_1750205948.xml · nonDerivative · entry 1

SATTERTHWAITE LIVINGSTON · CIK 0001517394 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 336,083

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

F2 · balance_after: Includes 331,773 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001628280-25-031982 · wk-form4_1750207265.xml · nonDerivative · entry 1

HSIEH Wen Hsuan · CIK 0001835160 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187,339

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

F2 · balance_after: Includes 44,444 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001940928-25-000009 · wk-form4_1748037269.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 866,134

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $2.40 to $2.48, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 690,211 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000008 · wk-form4_1748036924.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,812,235

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $2.40 to $2.48, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 1,537,960 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001698362-25-000008 · wk-form4_1748037074.xml · nonDerivative · entry 1

Wallach Sandra · CIK 0001698362 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,033,665

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $2.40 to $2.48, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 874,725 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0002067233-25-000005 · wk-form4_1746576758.xml · nonDerivative · entry 1

Stepien Thomas M · CIK 0002067233 · Director · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 400,000

F1 · shares: The securities are represented by restricted stock units granted on May 1, 2025. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on May 20, 2026 and the remainder will vest quarterly over three years thereafter, on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on May 20, 2029.

SEC source: 0001940928-25-000004 · wk-form4_1742590507.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 886,500

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/16th of shares subject to award will vest on May 20, 2025 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2029.

F2 · balance_after: Includes 742,467 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000004 · wk-form4_1742590987.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,882,021

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/16th of shares subject to award will vest on May 20, 2025 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2029.

F2 · balance_after: Includes 1,664,152 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001698362-25-000003 · wk-form4_1742590616.xml · nonDerivative · entry 1

Wallach Sandra · CIK 0001698362 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,061,260

F1 · shares: The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/16th of shares subject to award will vest on May 20, 2025 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2029.

F2 · balance_after: Includes 945,535 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001940928-25-000003 · wk-form4_1742332052.xml · derivative · entry 2

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock · 3,471 shares

Expires 2025-03-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001940928-25-000003 · wk-form4_1742332052.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 424,960

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 280,927 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001899287-25-000003 · wk-form4_1741814092.xml · derivative · entry 2

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common stock · 3,471 shares

Expires 2025-03-17

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001899287-25-000003 · wk-form4_1741814092.xml · nonDerivative · entry 1

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 422,668

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: Includes 419,197 restricted stock units, each of which represents a contingent right to receive one share of the Issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001940928-25-000002 · wk-form4_1740443919.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 421,489

F1 · shares: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $3.06 to $3.215, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 280,927 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-25-000002 · wk-form4_1740444122.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,282,621

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $3.06 to $3.215, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 1,064,752 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001698362-25-000002 · wk-form4_1740444053.xml · nonDerivative · entry 1

Wallach Sandra · CIK 0001698362 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 678,000

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $3.06 to $3.215, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 562,275 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001942459-25-000002 · wk-form4_1740443834.xml · nonDerivative · entry 1

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 419,197

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $3.06 to $3.215, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: These securities are restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001940928-24-000009 · wk-form4_1732310477.xml · nonDerivative · entry 1

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 430,555

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.93 to $2.02, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 304,338 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001476220-24-000007 · wk-form4_1732310949.xml · nonDerivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,316,974

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.93 to $2.02, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 1,153,482 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001698362-24-000007 · wk-form4_1732310718.xml · nonDerivative · entry 1

Wallach Sandra · CIK 0001698362 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 696,142

F1 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F2 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.93 to $2.02, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3 · balance_after: Includes 609,131 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001942459-24-000021 · wk-form4_1732310861.xml · nonDerivative · entry 3

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 454,131

F6 · kind: This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

F7 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.93 to $2.02, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F8 · balance_after: These securities are restricted stock units, each of which represents a contingent right to receive one share of the Issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

SEC source: 0001942459-24-000021 · wk-form4_1732310861.xml · nonDerivative · entry 2

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,040,950

F4 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.92 to $2.02, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F5 · balance_after: Includes 16,763 shares of the issuer's common stock previously held directly by the reporting person, which were transferred on November 21, 2024 to the Jonathan G. Bornstein and Phyllis S. Brock Trust Agreement, for which the reporting person and his spouse are co-trustees.

F3 · ownership.nature: The securities are held directly by Jonathan G. Bornstein and Phyllis S. Brock Trust Agreement, for which the reporting person and his spouse are co-trustees.

SEC source: 0001942459-24-000021 · wk-form4_1732310861.xml · nonDerivative · entry 1

Bornstein Jonathan · CIK 0001942459 · President of Amprius Lab

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,039,187

F1 · price: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $1.89 to $1.98, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F2 · balance_after: These shares of the issuer's common stock, which were previously held directly by the reporting person, were transferred on September 30, 2024 to the Jonathan G. Bornstein and Phyllis S. Brock Trust Agreement, for which the reporting person and his spouse are co-trustees.

F3 · ownership.nature: The securities are held directly by Jonathan G. Bornstein and Phyllis S. Brock Trust Agreement, for which the reporting person and his spouse are co-trustees.

SEC source: 0001628280-24-043856 · wk-form4_1729895624.xml · derivative · entry 4

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,613

Underlying: Common stock · 139,613 shares

Expires 2031-12-15

F3 · kind: In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F7 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 201,110 shares of Amprius Holdings' Class A common stock at an exercise price of $2.55 per share.

F4 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043856 · wk-form4_1729895624.xml · derivative · entry 3

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,653

Underlying: Common stock · 41,653 shares

Expires 2027-03-15

F3 · kind: In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F6 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 60,000 shares of Amprius Holdings' Class A common stock at an exercise price of $0.43 per share.

F4 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043856 · wk-form4_1729895624.xml · derivative · entry 2

Stefan Constantin Ionel · CIK 0001940928 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,471

Underlying: Common stock · 3,471 shares

Expires 2025-03-17

F3 · kind: In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F5 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 5,000 shares of Amprius Holdings' Class A common stock at an exercise price of $0.68 per share.

F4 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043849 · wk-form4_1729895301.xml · nonDerivative · entry 2

Amprius, Inc. · CIK 0001946058 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,500,071

F2 · kind: On October 23, 2024, the Reporting Person voluntarily liquidated and dissolved. In connection therewith, the Reporting Person distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution").

F2 · shares: On October 23, 2024, the Reporting Person voluntarily liquidated and dissolved. In connection therewith, the Reporting Person distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution").

F2 · price: On October 23, 2024, the Reporting Person voluntarily liquidated and dissolved. In connection therewith, the Reporting Person distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution").

SEC source: 0001628280-24-043849 · wk-form4_1729895301.xml · nonDerivative · entry 1

Amprius, Inc. · CIK 0001946058 · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 59,695,997

F1 · kind: Immediately prior to the Liquidating Distribution (as defined below), the Reporting Person contributed 5,500,000 shares of the Issuer's common stock in exchange for, among other things, the Issuer assuming the Reporting Person's outstanding options to purchase shares of the Reporting Person's Class A common stock.

F1 · shares: Immediately prior to the Liquidating Distribution (as defined below), the Reporting Person contributed 5,500,000 shares of the Issuer's common stock in exchange for, among other things, the Issuer assuming the Reporting Person's outstanding options to purchase shares of the Reporting Person's Class A common stock.

F1 · price: Immediately prior to the Liquidating Distribution (as defined below), the Reporting Person contributed 5,500,000 shares of the Issuer's common stock in exchange for, among other things, the Issuer assuming the Reporting Person's outstanding options to purchase shares of the Reporting Person's Class A common stock.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 7

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 967,539

Underlying: Common stock · 967,539 shares

Expires 2030-09-17

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F9 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 1,393,713 shares of Amprius Holdings' Class A common stock at an exercise price of $1.73 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 6

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,974,502

Underlying: Common stock · 1,974,502 shares

Expires 2031-12-15

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F8 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 2,844,212 shares of Amprius Holdings' Class A common stock at an exercise price of $2.55 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 5

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,171,476

Underlying: Common stock · 1,171,476 shares

Expires 2034-09-26

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F7 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 1,687,476 shares of Amprius Holdings' Class A common stock at an exercise price of $0.54 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 4

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 202,934

Underlying: Common stock · 202,934 shares

Expires 2026-12-14

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F6 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 292,321 shares of Amprius Holdings' Class A common stock at an exercise price of $0.68 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 3

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 41,653

Underlying: Common stock · 41,653 shares

Expires 2027-03-15

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F5 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 60,000 shares of Amprius Holdings' Class A common stock at an exercise price of $0.43 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 2

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 208,264

Underlying: Common stock · 208,264 shares

Expires 2029-01-02

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F4 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 300,000 shares of Amprius Holdings' Class A common stock at an exercise price of $1.69 per share.

F2 · derivative.exercise_date: The options are fully vested.

SEC source: 0001628280-24-043854 · wk-form4_1729895543.xml · derivative · entry 1

Sun Kang · CIK 0001476220 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 208,265

Underlying: Common stock · 208,265 shares

Expires 2027-12-12

F1 · kind: On October 23, 2024, Amprius, Inc. ("Amprius Holdings") voluntarily liquidated and dissolved and distributed to its stockholders on a pro rata basis an aggregate of 57,195,926 shares of the Issuer's common stock (the "Liquidating Distribution"). In connection with the Liquidating Distribution, the Issuer assumed Amprius Holdings' outstanding options to purchase shares of Amprius Holdings' Class A common stock (the "Holdings Options") granted under the Amprius, Inc. 2008 Stock Plan and the Amprius, Inc. Second Equity Incentive Plan (the "Option Assumption"). As a result of the Option Assumption, each Holdings Option held by the Reporting Person became an option to purchase a number of shares of the Issuer's common stock, subject to certain adjustments to the terms of such options to comply with the requirements of U.S. Internal Revenue Code treasury regulation relating to equity grant assumptions.

F3 · price: Received in connection with the Option Assumption in exchange for stock options to acquire 300,000 shares of Amprius Holdings' Class A common stock at an exercise price of $0.43 per share.

F2 · derivative.exercise_date: The options are fully vested.