Form 4: Amprius Technologies CTO Sells Shares to Cover Tax Obligations Following RSU Vesting

Amprius Technologies' Chief Technology Officer, Stefan Constantin Ionel, sold 20,366 shares of common stock for approximately $2.43 per share to satisfy tax withholding obligations related to the vesting of restricted stock units.

Summary

• Stefan Constantin Ionel, Chief Technology Officer of Amprius Technologies, Inc. (AMPX), reported a transaction on May 21, 2025.
• The transaction involved the sale of 20,366 shares of Amprius Technologies common stock.
• The shares were sold at an average price of $2.432 per share, with prices ranging from $2.40 to $2.48.
• This sale was non-discretionary and mandated by the issuer to fund tax withholding obligations associated with the vesting of restricted stock units (RSUs).
• Following this transaction, Mr. Ionel beneficially owns 866,134 shares, which includes 690,211 restricted stock units.

Sentiment

Score: 6

Explanation: The sentiment is neutral to slightly positive. While it's an insider sale, it's for a routine tax obligation (sell-to-cover) and not a discretionary sale, which typically does not signal a lack of confidence in the company.

Negatives

• The sale represents a reduction in direct beneficial ownership by a key executive, though it is for tax purposes.

Future Outlook

This document does not contain any forward-looking statements or guidance regarding the company's future outlook.

Management Comments

• The 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.

Industry Context

This Form 4 filing is specific to an insider transaction at Amprius Technologies and does not provide information on broader industry trends or competitive landscape.

Stakeholder Impact

• Shareholders: The sale represents a minor dilution of outstanding shares, but it is a routine transaction for tax purposes and not indicative of a change in company fundamentals or executive confidence.

Key Dates

Recommendation

Keywords

Amprius Technologies, AMPX, Form 4, Insider Transaction, Stock Sale, Chief Technology Officer, Stefan Constantin Ionel, Restricted Stock Units, RSU Vesting, Tax Withholding