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Amprius Technologies, Inc. announced that Chief Financial Officer Sandra Wallach intends to retire from her role. Her retirement will become effective upon the appointment of a successor, which is expected by or before the end of the fourth quarter of 2025.
The company states that her decision is not due to any disagreement related to operations, policies, or practices. After stepping down as CFO, she plans to remain involved with Amprius in a consulting or other capacity to help ensure a smooth transition.
The Board of Directors has begun a formal process to identify and recruit the next Chief Financial Officer, aiming for continuity in financial leadership as this planned transition moves forward.
Insider transaction summary: The Chief Technology Officer of Amprius Technologies, Inc. sold 19,159 shares of common stock on 08/21/2025 at an average price of $6.8162 per share. The filing states these sales were effected under non-discretionary, sell-to-cover arrangements required by the company to satisfy tax withholding obligations arising from the vesting of restricted stock units. After the reported disposition, the reporting person beneficially owns 846,975 shares, which include 637,953 restricted stock units that convert to one share each subject to vesting schedules. The Form 4 was signed on 08/25/2025.
Insider sale tied to RSU vesting: Sandra Wallach, Chief Financial Officer of Amprius Technologies, sold 28,390 shares on 08/21/2025 under non-discretionary sell-to-cover arrangements to satisfy tax withholding for vested restricted stock units. The reported average execution price was $6.8162, with transaction prices ranging from $6.78 to $6.91. After the sale, Wallach beneficially owns 1,005,275 shares, which includes 803,914 restricted stock units that remain subject to vesting conditions. The filing is a routine Section 16 disclosure showing a tax-driven disposition rather than an open-market sell decision.
Amprius Technologies insider filing: The Form 4 reports that Sun Kang, CEO and director of Amprius Technologies (AMPX), sold 65,654 shares on 08/21/2025 under the issuer's non-discretionary sell-to-cover arrangements to fund tax withholding, at an average execution price of $6.8162 per share (individual trade prices ranged $6.78–$6.91). After the sale, Mr. Kang directly beneficially owns 1,472,306 shares, which include 1,411,769 restricted stock units that convert to common shares subject to vesting. Separately, on 06/10/2025 he transferred 274,275 directly held shares to the Kang & Cecillia Sun Family Revocable Trust, which now holds those shares.
Amprius Technologies (AMPX) report of proposed sale under Rule 144: An individual plans to sell 19,159 shares of common stock on 08/21/2025 through Morgan Stanley Smith Barney LLC on the NYSE. The filing lists an aggregate market value of 130,592 and total shares outstanding of 125,075,837. The shares were acquired on 08/20/2025 upon the release of restricted stock units from the issuer; the filing shows 52,258 securities were acquired in that grant and payment was for compensation. No sales by the person in the prior three months are reported. The filer certifies they are not aware of undisclosed material adverse information.
Amprius Technologies, Inc. (AMPX) submitted a Form 144 notice for a proposed sale of common stock through Morgan Stanley Smith Barney LLC with an approximate aggregate market value of $447,511. The filing lists 65,654 shares to be sold on 08/21/2025 on the NYSE. The securities were reported as acquired on 08/20/2025 upon the release of restricted stock units from the issuer and were indicated as compensation, with 126,191 shares shown as the amount acquired. The filing reports 125,075,837 shares outstanding. No sales by the reporting person were reported in the past three months. The filer attests there is no undisclosed material adverse information.
Amprius Technologies (AMPX) filed a Form 144 notifying a proposed sale of 28,390 shares of common stock through Morgan Stanley Smith Barney on the NYSE, with an aggregate market value listed as 193,512. The shares were acquired on 08/20/2025 as a release of restricted stock units from the issuer and were granted as compensation. The filer reports 70,811 shares acquired in that release and shows 125,075,837 shares outstanding. No securities were reported sold by the filer in the past three months. The filing includes the standard signature representation that the filer is not aware of undisclosed material adverse information.
Amprius Technologies, Inc. (AMPX) Schedule 13G/A amendment reports that the four reporting persons identified—SAIF Partners IV L.P., SAIF IV GP, L.P., SAIF IV GP Capital Ltd., and Andrew Y. Yan—beneficially own 0 shares of Amprius common stock as of June 30, 2025, representing 0.0% of the class. The filing states the reporting persons are not a group and provides their jurisdictions of organization (Cayman Islands for the entities; Hong Kong for Mr. Yan). The document includes a certification that the securities were not acquired to influence control and references a previously filed joint filing agreement as Exhibit 99.1.
Amprius Technologies (AMPX) Q2 2025 10-Q highlights
- Revenue surged 350% YoY to $15.1 m; 1H-25 revenue up 364% to $26.4 m, driven by strong demand for SiCore batteries and 43 new customers.
- Margins improving: Q2 gross profit of $1.3 m (9% margin) vs. $-6.5 m prior-year; 1H gross loss narrowed to $-1.0 m.
- Operating loss narrowed to $6.8 m (vs. $12.9 m); net loss $6.4 m, or $0.05/sh, vs. $0.13/sh prior-year. 1H net loss down 30% to $15.7 m.
- Liquidity: Cash & equivalents $54.2 m; ATM program has raised $53.3 m to date with $46.7 m capacity remaining. No debt; lease liabilities $37.7 m.
- Capacity expansion: Access to up to 1.8 GWh annual SiCore production via global contract manufacturers; Fremont pilot line expanded; $10.5 m DIU contract supports additional electrode capacity. Brighton, CO GWh project on hold pending funding and potential sub-lease.
- Customer concentration: Two customers represent 52% of A/R and 41%/11% of Q2 revenue.
- Shares outstanding 125.1 m; 19.0 m warrants remain (exercise $11.50–$12.50).
Management believes existing cash plus ATM proceeds will fund operations for at least 12 months, but continued losses and cap-ex needs mean additional capital may be required.