Form 4: Amprius CTO Sells Shares for Tax Obligations
Insider Transaction Report
Amprius Technologies' Chief Technology Officer, Constantin Ionel Stefan, sold 25,024 shares of common stock to cover tax withholding obligations related to restricted stock unit vesting.
Summary
- Constantin Ionel Stefan, Chief Technology Officer of Amprius Technologies, Inc. (AMPX), reported a sale of common stock.
- The transaction involved the disposition of 25,024 shares of common stock on November 21, 2025.
- The shares were sold at an average price of $10.0813 per share, with individual transactions ranging from $10.05 to $10.13.
- This sale was executed pursuant to non-discretionary, sell-to-cover arrangements to fund tax withholding obligations associated with the vesting of restricted stock units.
- Following this transaction, Stefan Constantin Ionel beneficially owns 821,951 shares, which includes 585,697 restricted stock units.
Sentiment
Score: 5
Explanation: The transaction is a routine, non-discretionary sale to cover tax obligations related to RSU vesting, which is a common occurrence for executives and generally considered neutral. While it reduces insider ownership, the reason mitigates any negative sentiment.
Positives
- The sale was non-discretionary and mandated by the issuer for tax purposes, indicating it was not a voluntary sale based on a change in outlook.
Negatives
- A reduction in direct beneficial ownership by a key executive, even if for tax purposes, decreases their direct equity stake in the company.
Future Outlook
This filing does not contain any forward-looking statements or guidance regarding the company's future outlook.
Industry Context
This routine insider transaction for tax purposes does not provide specific insights into broader industry trends or competitive landscape.
Corporate Governance
| Change Type | Description | Effective Date | Impact Assessment |
|---|---|---|---|
| Power of Attorney Grant | Constantin Ionel Stefan granted a Power of Attorney to Thomas M Stepien, Ricardo C. Rodriguez, and Siyu Jiang to facilitate SEC filings, including Forms 3, 4, 5, 13D, 13G, and 144. | 11/05/2025 | Streamlines the process for the Chief Technology Officer to comply with SEC reporting requirements, ensuring timely and accurate disclosures of beneficial ownership changes. |
Stakeholder Impact
- Shareholders: A minor reduction in direct insider ownership, but the non-discretionary nature for tax purposes typically has minimal impact on investor confidence.
Key Dates
| Date | Description |
|---|---|
| 11/05/2025 | Power of Attorney granted by Constantin Ionel Stefan. |
| 11/21/2025 | Date of common stock transaction by Constantin Ionel Stefan. |
| 11/25/2025 | Date Form 4 was signed by attorney-in-fact. |
Recommendation
holdThe reported transaction is a routine 'sell-to-cover' for tax withholding obligations upon the vesting of restricted stock units. This is a common and non-discretionary event for executives and does not reflect a change in the insider's view of the company's prospects. Therefore, it does not warrant a change in investment recommendation.
Keywords
Amprius Technologies, AMPX, Insider Trading, Form 4, CTO, Stock Sale, Restricted Stock Units, Tax Withholding
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