Form 4: Amprius CEO Sells Shares for Tax Obligations

Amprius Technologies CEO Kang Sun sold 65,654 shares of common stock to cover tax withholding obligations related to restricted stock unit vesting.

Summary

• Amprius Technologies, Inc. CEO and Director, Kang Sun, sold 65,654 shares of common stock on August 21, 2025.
• The shares were sold at an average price of $6.8162 per share, with transactions ranging from $6.78 to $6.91.
• This sale was a non-discretionary "sell-to-cover" arrangement to fund tax withholding obligations associated with the vesting of restricted stock units.
• Following the transaction, Kang Sun directly beneficially owns 1,472,306 shares, which includes 1,411,769 restricted stock units.
• Additionally, 274,275 shares are indirectly beneficially owned through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, to which shares were transferred on June 10, 2025.

Sentiment

Score: 5

Explanation: The transaction is a routine, non-discretionary sale for tax purposes, which is generally neutral. It does not indicate a change in management's view of the company's prospects.

Positives

• The sale was non-discretionary, indicating it was not a voluntary decision to reduce exposure but rather a mandated action for tax purposes.

Negatives

• A reduction in direct beneficial ownership by a key executive, even if for tax purposes, could be perceived negatively by some investors.

Future Outlook

NA

Industry Context

This is an insider transaction filing, which is specific to the company and its executive's compensation structure, not directly related to broader industry trends.

Related Party Transactions

• On June 10, 2025, Kang Sun transferred 274,275 shares of common stock to the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which he and his spouse are co-trustees. This constitutes a related party transaction for estate planning purposes.

Stakeholder Impact

• Shareholders: The sale of shares by the CEO, even for tax purposes, slightly increases the float and could be perceived as a minor negative, though the non-discretionary nature mitigates this. The transfer to a family trust is an internal estate planning matter with no direct market impact.

Key Dates

Recommendation

The transaction is a routine, non-discretionary sale by the CEO to cover tax obligations related to RSU vesting. This is a common occurrence and does not typically signal a change in the company's fundamentals or management's confidence. Therefore, it does not warrant a change in investment recommendation based solely on this filing.

Keywords

Amprius Technologies, AMPX, Kang Sun, CEO, Insider Trading, Form 4, Stock Sale, Restricted Stock Units, Tax Withholding, Beneficial Ownership