401(k) · DOL Form 5500 · 2024

Amkor Technology, Inc. 401(k) Plan

Data updated 2026-08-25

$223M
Total assets Near avg plan size
373
Participants Below avg headcount
95th
Percentile by assets National rank
$597,518
Avg per participant High balance/head
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Official DOL plan name: Amkor Technology, Inc. 401(k) Plan · Sponsored by Amkor Technology, Inc. · Arizona · Manufacturing

$223M in assets, 373 participants

Amkor Technology, Inc.'s Amkor Technology, Inc. 401(k) Plan reported $223M in total assets and 373 participants in its 2024 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.

  • #16,323 in Manufacturing (17,777 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, $223M for 373 participants (~$597,518/participant), up 9.3% in 2024.

#16,323
in Manufacturing (17,777 peers)
+9.3%
assets growth YoY
2.2×
vs typical plan assets (national mean)

Amkor Technology, Inc. 401(k) Plan's outsized position by total assets

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

End-of-year total assets · plan year 2024 · DOL Form 5500

$222,874,124 Top 5% higher than 95% of 123,620 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

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

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2024

Amkor Technology, Inc. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Amkor Technology, Inc. 401(k) Plan sits mid-pack in the medium band (373 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Amkor Technology, Inc. 401(k) Plan reported net income fell from $29M in the plan year 2023 filing to $19M in the plan year 2024 filing.
  • Amkor Technology, Inc. 401(k) Plan end-of-year assets rose from $204M in the plan year 2023 filing to $223M in the plan year 2024 filing.
  • Amkor Technology, Inc. 401(k) Plan reported participants fell from 383 in the plan year 2023 filing to 373 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 231722724 · Amkor Technology, Inc. PY 2024 · 401(k)

Amkor Technology, Inc. 401(k) Plan · $223M · 373 · 95th

  • NET $223M
  • NET 373
  • NET 95th
  • NET 401(k)
  • NET near Edf Renewables 401(k) Plan
  • NET ind #16323

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Manufacturing retirement plans → · Plans in Arizona →

Amkor Technology, Inc. 401(k) Plan in the asset neighbourhood

Heritage Environmental Services, LLC Retirement Savings PlanHeritage Environmental Servi…$223MGuthrie 401(k) Retirement Savings PlanGuthrie 401(k) Retirement Sa…$223MAmkor Technology, Inc. 401(k) PlanAmkor Technology, Inc. 401(k…$223MEdf Renewables 401(k) Plan$223MTrustage 401(k) Plan for Represented EmployeesTrustage 401(k) Plan for Rep…$223M
End-of-year total assets ($M) among Amkor Technology, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Scale-class filing particulars (2024)

Total Assets (Beginning of Year)$204M
Net Assets (End of Year)$223M
Net Income$19M
Employer EIN231722724
Plan Effective Date1986-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Amkor Technology, Inc.)

Sponsor-wide plan assets over time

All Amkor Technology, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$223M 27.760413375909486% vs 2022
2024 filing year
$160M$180M$200M$220M$240M 202220232024 $174M $223M ▲ +27.8%
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 Scatter plot of 6 data points. -200000200004000060000 -202468 Total assets ($B) Participants Amkor Technology, Inc. 401(k) Plan, Total assets ($B): 0.222874124 · Participants: 373Amkor Technology, Inc. 401(k) PlanBechtel Trust & Thrift Plan, Total assets ($B): 6.067288511 · Participants: 7971Bechtel Trust & Thrift PlanBanner Health Employees 401(k) Plan, Total assets ($B): 4.918574883 · Participants: 54731Banner Health Employees 401(k) PlanFreeport-Mcmoran Inc. Employee Capital Accumulation Program, Total assets ($B): 2.670667399 · Participants: 13770Freeport-Mcmoran Inc. Employee Capital Accumulation ProgramRepublic Services, Inc. 401(k) Plan, Total assets ($B): 2.666764279 · Participants: 32629Republic Services, Inc. 401(k) PlanStantec 401(k) Plan, Total assets ($B): 2.319061108 · Participants: 11603Stantec 401(k) Plan
Amkor Technology, Inc. 401(k) Plan vs. nearby 401(k) plans in Arizona, assets vs. participants
Compare Amkor Technology, Inc. 401(k) Plan side-by-side with 3 peers →

Amkor Technology, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Arizona, the nearest 401(k) by assets is Edf Renewables 401(k) Plan in CA ($223M); by covered participants it is Dura Bond Retirement Savings Plan in PA (373 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($223M here).

Similar participant headcount

Nearest other-state filings by covered participants (373 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Amkor Technology, Inc. 401(k) Plan assets move in 2024? ▼
Amkor Technology, Inc. 401(k) Plan grew at a solid clip - up 9.3% during 2024, from $204M to $223M. Reported net income was $19M.
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 123,622 plans that reported assets for plan year 2024 (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 Edf Renewables 401(k) Plan in CA ($223M, 1,402 participants).
Which 401(k) plans cover a similar participant headcount to Amkor Technology, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Dura Bond Retirement Savings Plan in PA (373 participants, $29M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

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

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.