Form 4: Amprius CTO Stefan Sells Shares for Tax Obligations

Chief Technology Officer Constantin Ionel Stefan sold 3,208 shares of Amprius Technologies to cover tax withholding obligations.

Summary

• Constantin Ionel Stefan, Chief Technology Officer of Amprius Technologies, Inc., executed a sale of 3,208 shares of common stock.
• The transaction occurred on May 27, 2026, at an average price of $17.1935 per share.
• The sale was conducted under a non-discretionary, sell-to-cover arrangement to satisfy tax withholding requirements related to the vesting of restricted stock units.
• Following this transaction, the reporting person retains beneficial ownership of 801,310 shares.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this as a neutral event, as the sale was a mandatory administrative action to satisfy tax obligations rather than a discretionary market move.

Positives

• The transaction was non-discretionary and mandated by the issuer, indicating it was not a voluntary divestment based on market sentiment.

Negatives

• Reduction in the direct equity stake held by a key executive.

Risks

• Reliance on restricted stock units as a significant portion of executive compensation.

Future Outlook

No forward-looking guidance provided in this filing.

Management Comments

• The transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations.

Industry Context

StockSavvy.ai notes that sell-to-cover transactions are standard corporate practice for executives receiving equity-based compensation and do not typically signal a change in management's outlook on the company's performance.

Comparison to Industry Standards

• The sell-to-cover mechanism is a standard regulatory compliance procedure used by most publicly traded companies to manage tax liabilities for employees.

Stakeholder Impact

• Minimal impact on shareholders as the transaction was a routine tax-related sell-to-cover.

Next Steps

• No future actions or milestones mentioned.

Key Dates

Keywords

Amprius Technologies, AMPX, Insider Trading, Form 4, Executive Compensation, Tax Withholding