Form 4: Amkor EVP RSU vesting prompts tax withholding

Amkor Technology EVP Kevin Engel had 669 RSU shares vest early due to retirement eligibility, with all shares withheld at $31.68 for taxes, leaving direct ownership unchanged at 11,321 shares.

Summary

• On 11/14/2025, Executive Vice President Kevin Engel had RSUs convert to common stock (Code M) and immediately withhold the same number of shares for taxes (Code F) due to retirement eligibility status.
• Shares involved: 30, 47, 223, and 369 (total 669) were issued at $0 and simultaneously withheld at $31.68 per share for taxes.
• Direct beneficial ownership after all transactions remained 11,321 common shares (direct).
• Derivative positions (RSUs) remaining after the transactions: 910; 2,736; 12,942; and 32,225 units (per Table II).
• All transactions occurred on 11/14/2025 and were signed by attorney-in-fact on 11/18/2025.

Sentiment

Score: 5

Explanation: Neutral, administrative insider transaction with no net change in direct ownership and no operational or financial performance implications.

Positives

• No open-market sales; share movements were for tax withholding, resulting in no net change to direct ownership (11,321 shares).
• Clear disclosure that vesting and withholding were tied to retirement eligibility status, indicating administrative—not discretionary—transactions.
• Substantial remaining unvested RSU exposure (910; 2,736; 12,942; 32,225 units) indicates continued equity alignment.

Negatives

• Early vesting due to retirement eligibility status could precede future status changes, though none are disclosed here.
• No increase in insider direct ownership; final common shares remained 11,321 after withholding.

Future Outlook

No forward-looking statements or guidance are provided.

Management Comments

• Shares were withheld to pay taxes associated with early RSU vesting triggered by retirement eligibility status.

Industry Context

Administrative RSU vesting and same-day share withholding for taxes are standard across U.S. public companies, including semiconductor peers; no open-market selling typically signals neutral impact on trading dynamics.

Comparison to Industry Standards

• Consistent with Rule 16b-3 exempt insider equity transactions commonly seen at peers such as Intel, Texas Instruments, and Micron, where RSUs vest and shares are withheld to cover taxes.
• No open-market sales, mirroring standard practice for executives’ tax obligations tied to vesting events.
• Remaining RSU balances are typical for senior executives in the semiconductor sector and indicate ongoing equity-based compensation alignment.

Stakeholder Impact

• Minimal impact on float and trading dynamics as all shares were withheld for taxes rather than sold on the open market.
• Confirms EVP’s direct ownership at 11,321 shares and substantial remaining RSU exposure.

Key Dates

Keywords

Amkor Technology, AMKR, Form 4, insider transaction, restricted stock units, RSU vesting, tax withholding, retirement eligibility, beneficial ownership, semiconductor packaging