Tily Gil C. 4

4 · AMKOR TECHNOLOGY, INC. · Filed May 15, 2026

AI-generated summary of this filing

Updated May 15, 2026

Amkor (AMKR) Director Tily Gil Converts RSUs, Receives New RSU Award

What Happened

Tily Gil C., a director of Amkor Technology, had previously granted RSUs vest on May 13, 2026: approximately 9,893 RSUs converted into common stock on a one-for-one basis (no cash paid). A very small fractional portion (0.0573 RSU) was settled in cash as a dividend equivalent. In addition, the director was granted 2,613 new RSUs on May 13, 2026 as compensation for board service (award).
Transaction amounts and prices reported: conversion/acquisition of ~9,893 shares at $0.00; a corresponding derivative disposition for ~9,893.057 units at $0.00 reflecting the cash settlement of the fractional DEU; grant of 2,613 RSUs at $0.00. No cash proceeds or purchase price was involved.

Key Details

Transaction date: May 13, 2026 (filed on May 15, 2026); filing appears timely.
Prices: $0.00 per share (typical for RSU conversion/award).
Shares owned after transaction: Not specified in the provided excerpt of the filing.
Footnotes of note:
- F1: The vested RSUs were from a May 15, 2025 award; 0.0573 RSU was settled in cash as a dividend equivalent and the remainder (including 104 DEUs) converted one-for-one to common stock.
- F2: The 2,613 RSUs granted on May 13, 2026 will vest in full on the earlier of the first anniversary of the grant or the next annual meeting; awarded solely for service as a director.
Transaction codes: M = exercise/conversion of derivative (RSU conversion); A = award/grant.

Context

This is a routine compensation event (RSU vesting and new RSU grant), not a market purchase or sale. Converting RSUs to shares is not a bullish or bearish trade signal by itself—it's the normal settlement of equity compensation. The small fractional RSU was cashed out rather than converted, which is standard practice for fractional amounts.

Form 4

Period: 2026-05-13

Director

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-05-13+9,893→ 118,699 total
Exercise/Conversion
Restricted Stock Units
[F1]
2026-05-13−9,893.057→ 0 total
→ Common Stock (9,893.057 underlying)
Award
Restricted Stock Units
[F2]
2026-05-13+2,613→ 2,613 total
→ Common Stock (2,613 underlying)

Footnotes (2)

[F1]On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026: (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, converted into common stock of the Issuer on a one-for-one basis.
[F2]Represents shares of common stock underlying RSUs granted on May 13, 2026 (the "Grant Date") pursuant to the Plan (the "2026 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.

Signature

/s/ Mark N. Rogers, Attorney-in-Fact for Gil C. Tily|2026-05-15

1 file