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

Amkor Technology's President and CEO, Guillaume Marie Jean Rutten, sold 10,000 shares of common stock for $30.74 per share on October 15, 2025, under a pre-arranged 10b5-1 trading plan.

Summary

• Guillaume Marie Jean Rutten, President and CEO of Amkor Technology, Inc., disposed of 10,000 shares of common stock.
• The transaction occurred on October 15, 2025, at a price of $30.74 per share.
• The sale was executed pursuant to a Rule 10b5-1 trading plan adopted on June 06, 2025.
• Following this transaction, Rutten beneficially owns 356,699 shares of Amkor Technology common stock.

Sentiment

Score: 5

Explanation: The sale was executed under a pre-arranged 10b5-1 trading plan, which typically indicates a planned liquidity event rather than a reaction to new information, thus maintaining a neutral sentiment.

Positives

• The transaction was executed under a Rule 10b5-1 trading plan, indicating a pre-scheduled sale rather than a reaction to recent non-public information.

Negatives

• The sale of 10,000 shares by the President and CEO could be perceived by some investors as a reduction in insider exposure, although mitigated by the 10b5-1 plan.

Future Outlook

No forward-looking statements or guidance are provided in this insider transaction report.

Industry Context

This filing reports an individual insider transaction and does not provide broader industry context or trends.

Stakeholder Impact

• Shareholders: The sale by a key executive, even under a 10b5-1 plan, might lead to questions about management's long-term conviction, though the remaining significant holdings mitigate this concern.

Key Dates

Recommendation

The sale of 10,000 shares by the CEO, while notable, was conducted under a pre-arranged Rule 10b5-1 trading plan. This suggests a planned liquidity event rather than a reaction to new material information, and the remaining beneficial ownership of 356,699 shares indicates continued significant alignment with shareholder interests. Therefore, this single transaction does not provide sufficient new information to alter a 'hold' recommendation.

Keywords

AMKOR TECHNOLOGY, AMKR, Insider Trading, Form 4, CEO, Stock Sale, 10b5-1 Plan, Guillaume Rutten