Form 4: Amprius Technologies Director Trades Under 10b5-1 Plan

Amprius Technologies Director Sun Kang executed trades involving stock options and common stock as part of a pre-arranged Rule 10b5-1 trading plan.

Summary

• Director Sun Kang engaged in transactions involving Amprius Technologies, Inc. (AMPX) common stock and stock options on April 1, 2026.
• These transactions were conducted under a Rule 10b5-1 trading plan established on August 18, 2025.
• The plan involved the acquisition of 1,312,505 shares at $1.78 and 187,495 shares at $3.68, totaling 1,500,000 shares.
• Additionally, the plan facilitated the disposition of 1,250,963 shares at an average price of $15.7328 and 249,037 shares at an average price of $16.7829, totaling 1,500,000 shares.
• Following these transactions, Sun Kang beneficially owns 2,842,400 shares directly and 56,406 shares indirectly through a family trust.

Sentiment

Score: 5

Explanation: StockSavvy.ai views this filing as neutral to slightly negative due to the significant volume of shares sold by a director, despite the transactions being conducted under a Rule 10b5-1 plan.

Positives

• The transactions were executed under a Rule 10b5-1 plan, indicating pre-planned and potentially less market-impactful trading activity.
• The director continues to hold a significant number of shares (2,842,400 directly and 56,406 indirectly), suggesting continued confidence in the company.

Negatives

• A substantial number of shares were sold, with over 1.5 million shares disposed of.
• The sale prices for a portion of the shares were significantly lower than the average sale price of other shares, potentially indicating a need for liquidity or a strategic exit from certain positions.

Risks

• The sale of a large number of shares by a director could be interpreted negatively by the market, potentially impacting investor sentiment.
• The reliance on a Rule 10b5-1 plan, while providing a defense against insider trading allegations, still represents a reduction in the director's direct holdings.

Future Outlook

The filing does not contain forward-looking statements or guidance. It solely reports on past transactions.

Management Comments

• The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 18, 2025.
• The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

Industry Context

StockSavvy.ai notes that insider trading under Rule 10b5-1 plans is a common practice for executives and directors to diversify their holdings or manage personal finances without triggering insider trading concerns. The volume and pricing of these trades can, however, still influence market perception.

Stakeholder Impact

• Shareholders may view the sale of a large number of shares by a director with caution, potentially leading to short-term negative sentiment.
• The indirect ownership through a family trust indicates that a portion of the director's holdings are managed jointly with his spouse.

Next Steps

• The reporting person may continue to execute trades under the existing Rule 10b5-1 plan.
• The company may receive requests for further information regarding the specific prices of shares sold.

Key Dates

Keywords

Form 4, SEC Filing, Insider Trading, Rule 10b5-1, Amprius Technologies, AMPX, Stock Options, Common Stock, Beneficial Ownership, Director Transactions, Equity Securities