Form 4: Director Steven Chu Sells Amprius Shares Under 10b5-1 Plan

Amprius Technologies Director Steven Chu executed significant sales of common stock in March 2026, following option exercises, under a pre-arranged 10b5-1 plan.

Summary

• Steven Chu, a Director of Amprius Technologies, Inc., engaged in multiple transactions involving the company's common stock in March 2026.
• These transactions were conducted under a Rule 10b5-1 pre-arranged trading plan.
• On March 10, 2026, Chu acquired 104,132 shares by exercising stock options at $0.62 per share and subsequently sold 166,632 shares at an average price of $17.9163.
• On March 12, 2026, Chu acquired 86,143 shares by exercising stock options at $2.61 per share and 69,422 shares by exercising stock options at $0.62 per share.
• On the same day, March 12, 2026, Chu sold a total of 155,565 shares in multiple transactions at average prices of $18.6467, $18.2148, and $18.5346.
• Following these transactions, Steven Chu directly beneficially owns 127,339 shares of common stock, which includes 44,444 restricted stock units.

Sentiment

Score: 4

Explanation: StockSavvy.ai views this as a moderately negative signal due to the significant volume of director sales, despite being executed under a 10b5-1 plan, which suggests the director is taking profits.

Positives

• The transactions were executed under a Rule 10b5-1 plan, indicating pre-planned sales rather than reactive selling.
• Option exercises occurred at significantly lower prices ($0.62 and $2.61) compared to the sale prices (ranging from $17.90 to $18.78), indicating substantial personal profit.

Negatives

• A significant number of shares (totaling 322,197 shares) were sold by a director, which can be interpreted as a reduction in insider confidence.
• The sales occurred at relatively high prices, suggesting the director capitalized on favorable market conditions to realize gains.

Future Outlook

NA

Industry Context

StockSavvy.ai notes that insider sales, even under 10b5-1 plans, are often scrutinized by investors for potential signals regarding management's view on future company performance or stock valuation, particularly in the high-growth battery technology sector where Amprius operates.

Comparison to Industry Standards

• StockSavvy.ai observes that while 10b5-1 plans are standard practice for insiders to manage equity holdings and avoid accusations of trading on material non-public information, significant sales by a director like Steven Chu, a prominent figure, can still be viewed with caution.
• For instance, similar large insider sales at companies like QuantumScape (QS) or Solid Power (SLDP) in the advanced battery space have sometimes preceded periods of stock price volatility, though the context of each company's specific developments is crucial.

Corporate Governance

Related Party Transactions

• The reported transactions are related party transactions as they involve a director of Amprius Technologies, Inc. selling company stock.

Stakeholder Impact

• Shareholders: May interpret significant insider sales as a signal of reduced confidence by a director, potentially leading to negative sentiment or downward pressure on the stock price.

Key Dates

Recommendation

The significant volume of sales by a director, even under a 10b5-1 plan, suggests that the insider believes the stock is currently well-valued or overvalued. While option exercises indicate prior confidence, the subsequent large-scale selling at substantially higher prices indicates a move to realize gains, which can be a bearish signal for investors.

Keywords

Amprius Technologies, AMPX, Steven Chu, Director, Insider Trading, Form 4, Stock Options, Share Sale, 10b5-1 Plan, Equity Transactions, SEC Filing