Form 4: Amkor Director Sells 10,000 Shares Under 10b5-1 Plan

Amkor Technology Director Guillaume Marie Jean Rutten sold 10,000 shares of common stock for approximately $531,400 as part of a pre-arranged trading plan.

Summary

• Guillaume Marie Jean Rutten, a Director of Amkor Technology, Inc. (AMKR), sold 10,000 shares of common stock.
• The transaction occurred on January 15, 2026, at a weighted average price of $53.14 per share.
• The total value of the shares sold was approximately $531,400.
• The sale was executed under a Rule 10b5-1 trading plan adopted on June 06, 2025.
• Following this transaction, Mr. Rutten directly beneficially owns 335,391 shares of Amkor Technology common stock.

Sentiment

Score: 5

Explanation: The sale is a pre-planned transaction under a 10b5-1 plan, which mitigates the negative signal often associated with insider sales. It's a routine event for many executives and directors for diversification or liquidity purposes.

Positives

• The sale was conducted under a pre-arranged Rule 10b5-1 trading plan, indicating it was not a reaction to recent negative news or an immediate loss of confidence in the company.

Negatives

• A director's sale of shares, even if pre-planned, can sometimes be perceived as a slight negative signal regarding future growth prospects or valuation, as it reduces insider ownership.

Future Outlook

No specific future outlook or guidance is provided in this Form 4 filing, as it primarily reports a past transaction.

Industry Context

This Form 4 filing reports an individual director's stock transaction and does not provide information directly related to broader industry trends or competitors. Amkor Technology operates in the semiconductor packaging and test services industry.

Related Party Transactions

• This filing reports a direct sale of shares by a director, which is a related party transaction in the context of insider reporting, but no other specific related party dealings are disclosed.

Stakeholder Impact

• Shareholders: The sale by a director, even if pre-planned, could be interpreted by some shareholders as a slight reduction in insider confidence, though the 10b5-1 plan mitigates this. The remaining beneficial ownership of 335,391 shares indicates continued significant stake.

Key Dates

Recommendation

The director's sale of 10,000 shares was executed under a pre-arranged Rule 10b5-1 trading plan, which suggests the transaction is for personal financial planning rather than a reaction to new, undisclosed negative information. While insider sales can sometimes be a bearish signal, the pre-planned nature makes it less impactful. The remaining beneficial ownership of 335,391 shares indicates continued alignment with shareholder interests. This single transaction does not provide sufficient new information to alter a fundamental investment thesis for Amkor Technology, hence a 'hold' recommendation is appropriate, maintaining existing positions based on broader company fundamentals and market conditions.

Keywords

Amkor Technology, AMKR, Form 4, Insider Trading, Director Sale, Guillaume Rutten, 10b5-1 Plan, Stock Sale, Semiconductor Packaging