Amkor Technology Inc (AMKR)

Pretax margin

		Dec 31, 2023	Sep 30, 2023	Jun 30, 2023	Mar 31, 2023	Dec 31, 2022	Sep 30, 2022	Jun 30, 2022	Mar 31, 2022	Dec 31, 2021	Sep 30, 2021	Jun 30, 2021	Mar 31, 2021	Dec 31, 2020	Sep 30, 2020	Jun 30, 2020	Mar 31, 2020	Dec 31, 2019	Sep 30, 2019	Jun 30, 2019	Mar 31, 2019
Earnings before tax but after interest (EBT) (ttm)	US$ in thousands	441,517	501,477	649,664	711,537	855,713	886,791	775,140	781,369	712,454	610,697	520,528	447,062	384,321	344,879	300,186	228,304	158,070	115,266	123,043	169,818
Revenue (ttm)	US$ in thousands	6,476,360	6,620,110	6,878,700	6,921,260	7,049,700	6,831,600	6,438,740	6,347,180	6,085,850	5,784,730	5,457,750	5,224,120	5,050,590	4,858,010	4,587,910	4,310,305	4,052,649	3,955,459	4,015,729	4,186,104
Pretax margin		6.82%	7.58%	9.44%	10.28%	12.14%	12.98%	12.04%	12.31%	11.71%	10.56%	9.54%	8.56%	7.61%	7.10%	6.54%	5.30%	3.90%	2.91%	3.06%	4.06%

December 31, 2023 calculation

Pretax margin = EBT (ttm) ÷ Revenue (ttm)
= $441,517K ÷ $6,476,360K
= 6.82%

AMKOR Technology Inc.'s pretax margin has shown a declining trend over the past eight quarters, starting at 12.24% in Q1 2022 and dropping to 6.83% in Q4 2023. This indicates a decrease in the proportion of pre-tax profits relative to total revenue. Despite some fluctuations, the overall downward trajectory suggests a potential inefficiency in cost control or an increase in expenses relative to revenue, which may warrant further investigation to identify root causes and implement corrective measures.