401(k) · DOL Form 5500 · 2023

Amkor Technology, Inc. 401(k) Plan

Data updated 2026-08-11

$204M
Total assets: 383
Participants: 95th
Percentile by assets: $532,379
Avg per participant

Official DOL plan name: Amkor Technology, Inc. 401(k) Plan · Sponsored by Amkor Technology, Inc. · Arizona · Manufacturing

$204M in assets, 383 participants

Amkor Technology, Inc.'s Amkor Technology, Inc. 401(k) Plan reported $204M in total assets and 383 participants in its 2023 DOL Form 5500 filing, ranking in the 95th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

95th percentile by assets (of 127,072 plans)
#17,207 in Manufacturing (18,722 peers)

Where Amkor Technology, Inc. 401(k) Plan sits by assets

Amkor Technology, Inc. 401(k) Plan sits in the top 5% of all filed plans by assets, $204M for 383 participants (~$532,379/participant), up 16.9% in 2023.

$204M
total plan assets (2023 EOY): 383
covered participants: 95th
percentile by assets (of 127,072 plans): $532,379
avg assets per participant

Where Amkor Technology, Inc. 401(k) Plan sits by total assets

Amkor Technology, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$203,901,316 Top 5% higher than 95% of 127,068 filed plans

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Amkor Technology, Inc. 401(k) Plan reported net income rose from -$30M in the plan year 2022 filing to $29M in the plan year 2023 filing.
Amkor Technology, Inc. 401(k) Plan end-of-year assets rose from $174M in the plan year 2022 filing to $204M in the plan year 2023 filing.
Amkor Technology, Inc. 401(k) Plan reported participants rose from 375 in the plan year 2022 filing to 383 in the plan year 2023 filing.

See the national 2022→2023 release diff →

State

Arizona

Industry

Manufacturing

Amkor Technology, Inc. 401(k) Plan vs the 2023 asset distribution

By assets, Amkor Technology, Inc. 401(k) Plan outranks 95% of the 127,072 plans that filed a Form 5500 for the 2023 plan year, and holds roughly 2.0x the national average plan size of $100M (721 average participants).

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)	$174M
Net Assets (End of Year)	$204M
Net Income	$29M
Employer EIN	231722724
Plan Effective Date	1986-01-01
Filing Status	FILING RECEIVED

Sponsor Plan History (Amkor Technology, Inc.)

Total plan assets by year, all Amkor Technology, Inc. plans on file

Year	Plans	Participants	Total Assets
2022	1	375	$174M
2023	1	383	$204M
2024	1	373	$223M

Nearby 401(k) Plans in Arizona

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Amkor Technology, Inc. 401(k) Plan vs. nearby 401(k) plans in Arizona, assets vs. participants

Bechtel Trust & Thrift Plan $5.7B · 7,448
Banner Health Employees 401(k) Plan $4.3B · 52,452
Republic Services, Inc. 401(k) Plan $2.4B · 28,131
Freeport-Mcmoran Inc. Employee Capital Accumulation Program $2.3B · 13,105
Stantec 401(k) Plan $2.0B · 10,719

Compare Amkor Technology, Inc. 401(k) Plan side-by-side with 3 peers →

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Amkor Technology, Inc. 401(k) Plan by total assets, not by location.

Safety National Casualty Corporation Savings & Profit Sharing Plan (MO) $204M · 680
Robbins Geller Rudman & Dowd LLP 401(k) Profit Sharing Plan (CA) $204M · 438
Hargrove 401(k) Plan and Trust (AL) $204M · 2,151
St. Paul Electrical Construction Workers 401(k) Plan (MN) $204M · 1,389

Frequently Asked Questions

How did Amkor Technology, Inc. 401(k) Plan assets move in 2023? ▼

Amkor Technology, Inc. 401(k) Plan grew sharply - up 16.9% during 2023, from $174M to $204M. Reported net income was $29M.

How have Amkor Technology, Inc. plan assets changed over time? ▼

Across 3 plan years on file (2022-2024), Amkor Technology, Inc.'s sponsor-wide assets grew 27.8%, from $174M to $223M.

Where does Amkor Technology, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼

Amkor Technology, Inc. 401(k) Plan ranks in the 95th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).

Which 401(k) plans are similar in size to Amkor Technology, Inc. 401(k) Plan? ▼

Among 401(k) plans in other states, the closest by assets is Safety National Casualty Corporation Savings & Profit Sharing Plan in MO ($204M, 680 participants).

Next read for Amkor Technology, Inc. 401(k) Plan

Scale reading

Ways to act on Amkor Technology, Inc. 401(k) Plan's numbers.

By total assets, Amkor Technology, Inc. 401(k) Plan ranks in the top 5% of all filed plans by assets. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in Arizona. Compare plans
Amkor Technology, Inc.'s sponsor-wide assets have grown 27.8% since 2022 across 3 plan years on file. More Manufacturing plans

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 231722724.