Company: AMKR
Filing Date: 2025-03-25
Form Type: PRE 14A
Source: 0001193125-25-062595
Chunk: 46

Company: AMKOR TECHNOLOGY, INC.
Filing Date: 2025-03-25
Form: PRE 14A
Chunk 46
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 200% of the PSUs awarded. On February 19, 2025, the Compensation Committee determined that the two-yearcumulative earnings per share for the 2023-2024 Performance Period was $2.90, or 55% of the target earnings per share for the 2023-2024 PSU Performance Period, which funded a formulaic payout of 0% for the February 2023 PSUs. Accordingly, no February 2023 PSUs vested. Performance Attainment - December 2023 PSUs. On December 14, 2023, the Compensation Committee awarded PSUs to our NEOs (the “December 2023 PSUs”). The December 2023 PSUs were earned based on the 31

achievement of performance goals designed to incentivize achievement related to the geographic expansion of the Company’s manufacturing footprint and expanding the Company’s advanced packaging capacity in support of end markets with high growth potential. The number of December 2023 PSUs was as follows: Mr. Rutten, 106,638 PSUs; Ms. Faust, 18,023 PSUs; Mr. Rogers, 8,260 PSUs; Mr. Haghighi, 8,260 PSUs; and Mr. Engel, 8,260 PSUs. On August 13, 2024 the Compensation Committee determined that performance goals applicable to the December 2023 PSUs were achieved and 100% of the December 2023 PSUs awarded to recipients vested in accordance with the terms of the applicable PSU award agreement. Performance Attainment – Year 1 EPS PSUs.On February 20, 2024, the Compensation Committee awarded the Year 1 EPS PSUs to our NEOs. The target number of Year 1 EPS PSUs was as follows: Mr. Rutten, 20,165 PSUs; Ms. Faust, 8,402 PSUs; Mr. Rogers, 3,711 PSUs; Mr. Haghighi, 3,711 PSUs; and Mr. Engel, 3,291 PSUs. The Year 1 EPS PSUs vested based on the level of achievement of an EPS performance goal for the 2024 EPS Performance Period according to the following terms:

| • |     | a threshold, target, and maximum level of performance was established |

| • |     | no PSUs would be earned unless 40% of the target earnings per share was achieved |

| • |     | 100% of