AMKOR TECHNOLOGY, INC.·4

May 7, 4:36 PM ET

Carolin Roger Anthony 4

4 · AMKOR TECHNOLOGY, INC. · Filed May 7, 2026

Research Summary

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Amkor (AMKR) Director Carolin Roger Anthony Exercises Options, Sells Shares

What Happened
Director Carolin Roger Anthony exercised options to acquire 20,000 shares of Amkor Technology common stock on May 5, 2026, paying $11.71 per share (total cost $234,200). The same day the insider sold 20,000 shares in the open market at a weighted average price of $76.24 per share, generating proceeds of $1,524,800. The Form 4 also shows a derivative disposition entry for 20,000 shares at $0, which reflects treatment of the option/derivative instrument upon exercise.

Key Details

  • Transaction date: May 5, 2026; Form 4 filed May 7, 2026 (timely filing, within the usual 2-business-day window).
  • Exercise: 20,000 shares acquired at $11.71 each for $234,200 (transaction code M).
  • Sale: 20,000 shares sold in the open market at a weighted average price of $76.24 ($1,524,800 total). Footnote reports sale prices ranged from $76.11 to $76.48.
  • Derivative entry: 20,000-share derivative disposed at $0 (reflects conversion/cancellation of the option instrument).
  • Shares owned after the transaction: Not specified in the provided data.
  • Footnotes: F1 notes the weighted-average sale price and offers to provide per-lot pricing on request; F2 notes the option was granted May 2, 2017 and vested May 1, 2018.

Context
This was an exercise of vested stock options followed by an immediate sale of the acquired shares—commonly a cashless or same-day exercise-and-sell for liquidity. Such transactions are routine for insiders exercising vested awards and do not, by themselves, indicate a change in company outlook.

Insider Transaction Report

Form 4
Period: 2026-05-05
Transactions
  • Exercise/Conversion

    Common Stock

    2026-05-05$11.71/sh+20,000$234,200114,409 total
  • Sale

    Common Stock

    [F1]
    2026-05-05$76.24/sh20,000$1,524,80094,409 total
  • Exercise/Conversion

    Director Stock Option (Right to Buy)

    [F2]
    2026-05-0520,0000 total
    Exercise: $11.71From: 2018-05-01Exp: 2027-05-02Common Stock (20,000 underlying)
Footnotes (2)
  • [F1]The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $76.11 to $76.48. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.
  • [F2]This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 2, 2017, vested in full on May 1, 2018.
Signature
/s/ Mark N. Rogers, Attorney-in-Fact for Roger A. Carolin|2026-05-07

Documents

1 file
  • 4
    wk-form4_1778186201.xmlPrimary

    FORM 4