Wen Hsuan Hsieh - 12 Mar 2026 Form 4 Insider Report for Amprius Technologies, Inc. (AMPX)

Role
Director
Signature
/s/Ricardo C. Rodriguez, attorney-in-fact on behalf of Wen Hsieh
Issuer symbol
AMPX
Transactions as of
12 Mar 2026
Net transactions value
-$7,620,033
Form type
4
Filing time
13 Mar 2026, 18:08:48 UTC
Previous filing
20 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
HSIEH Wen Hsuan Director C/O AMPRIUS TECHNOLOGIES, INC.,, 1180 PAGE AVENUE, FREMONT /s/Ricardo C. Rodriguez, attorney-in-fact on behalf of Wen Hsieh 13 Mar 2026 0001835160

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPX Common stock Options Exercise +270,251 +144% $2.61* 457,590 12 Mar 2026 Direct F1
transaction AMPX Common stock Sale $5,239,245 -282,500 -62% $18.55 175,090 12 Mar 2026 Direct F1, F2
transaction AMPX Common stock Sale $2,380,788 -130,646 -75% $18.22 44,444 12 Mar 2026 Direct F1, F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AMPX Stock Option (right to buy) Options Exercise -270,251 -100% $2.61* 0 12 Mar 2026 Common stock 270,251 $2.61 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.45 to $18.78, 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 The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.12 to $18.39, 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.

Remarks:

Exhibit 24-Power of Attorney