Guide · Rankings
The Largest 401(k) Plans in America
Which companies have the biggest 401(k) plans? The 20 largest 401(k) plans by total assets from DOL Form 5500 2024 data.
The Boeing Co. and Consolidated Subsidiaries asset #1 is not Walmart Inc. participant #1
According to DOL Form 5500 2024 filings tagged in this 401(k) pool, The Boeing Co. and Consolidated Subsidiaries ranks #1 of 87,994 by reported end-of-year assets ($73.9B, 139,394 participants, participant rank #32). Walmart Inc. ranks #1 of 87,994 by participants (1,635,899 covering $50.8B, asset rank #9). The largest reported balance is not the largest headcount.
- The Boeing Co. and Consolidated Subsidiaries $73.9B assets · participants rank #32
- Walmart Inc. 1,635,899 participants · assets rank #9
Form 5500 401(k) pool
Largest 401(k) assets is not largest 401(k) headcount
- 87,994
- 401(k) filings in pool
- $73.9B
- Asset #1 (The Boeing Co. and Consolidated Subsidiaries)
- 1,635,899
- Participant #1 (Walmart Inc.)
The filing-size view
The Boeing Co. and Consolidated Subsidiaries leads this 20-record 401(k) filing list by reported end-of-year assets.
- 20
- filings shown
- 2024
- plan year
- 94,667
- 401(k)-type filings in the same aggregate
The ordering uses reported end-of-year assets. It does not rate investment options, employer match, fees, or plan quality.
Asset concentration inside this 20-filing list
The first 5 filings account for 35% of the reported end-of-year assets in the 20 records shown. This is a concentration view of the list, not a measure of plan quality or participant outcomes.
Source: DOL EBSA Form 5500 annual return filings, plan year 2024; only the 20 records displayed above are included.
The Department of Labor's Form 5500 records are plan-level disclosures. PlainRetire orders the rows below by the end-of-year asset figure reported in the current plan-year filing. A sponsor can maintain more than one plan, and a large reported balance does not by itself describe fees, investment choices, benefit accruals, or an individual's account. See our methodology for the data scope and field definitions.
| # | Plan Name | Sponsor | Participants | Total Assets |
|---|---|---|---|---|
| 1 | The Boeing Company 401(k) Retirement Plan | The Boeing Co. and Consolidated Subsidiaries | 139,394 | $73.9B |
| 2 | Microsoft Corporation Savings Plus 401(k) Plan | Microsoft Corporation | 118,818 | $65.6B |
| 3 | The Bank of America 401(k) Plan | Bank of America Corporation | 168,963 | $62.9B |
| 4 | IBM 401(k) Plan | International Business Machines Corporation | 52,674 | $60.4B |
| 5 | Rtx Savings Plan | Rtx Corporation | 124,876 | $58.6B |
| 6 | Wells Fargo & Company 401(k) Plan | Wells Fargo & Company | 179,076 | $57.9B |
| 7 | JPMorgan Chase 401(k) Savings Plan | JPMorgan Chase Bank, National Association | 185,532 | $52.9B |
| 8 | Lockheed Martin Corporation Salaried Savings Plan | Lockheed Martin Corporation | 96,812 | $51.4B |
| 9 | Walmart 401(k) Plan | Walmart Inc. | 1,635,899 | $50.8B |
| 10 | Google LLC 401(k) Savings Plan | Google LLC | 116,712 | $48.7B |
| 11 | AT&T Retirement Savings Plan | AT&T Inc. | 109,889 | $43.1B |
| 12 | Costco 401(k) Retirement Plan | Costco Wholesale Corporation | 202,468 | $41.0B |
| 13 | Northrop Grumman Savings Plan | Northrop Grumman Corporation | 104,719 | $39.5B |
| 14 | Amazon 401(k) Plan | Amazon.Com Services, LLC | 1,209,303 | $34.6B |
| 15 | Fidelity Retirement Savings Plan | Fmr LLC | 66,907 | $34.2B |
| 16 | Oracle Corporation 401(k) Savings and Investment Plan | Oracle Corporation | 58,962 | $31.0B |
| 17 | CVS Health Future Fund 401(k) Plan | CVS Health Corporation | 240,493 | $30.1B |
| 18 | Verizon Savings Plan for Management Employees | Verizon Communications Inc. | 69,218 | $29.4B |
| 19 | Unitedhealth Group 401(k) Savings Plan | Unitedhealth Group Incorporated | 205,460 | $26.6B |
| 20 | Fedex Corporation Retirement Savings Plan | Fedex Corporation | 113,079 | $25.4B |
How to use the ranking responsibly
- Start with the filing: open a plan record to verify the reported plan year, sponsor, assets, and participant count.
- Keep the metric narrow: this list ranks reported assets, not employer generosity, fund quality, expenses, or participant outcomes.
- Use the primary documents for personal questions: the plan's summary materials and the complete public filing carry details this ranking does not calculate.
Next steps
A large reported balance is a starting point for inspection, not a recommendation.
- Open a filing to compare its reported scale and participant count. Browse plan records
- Read the field and scope limits before drawing a personal conclusion. Read methodology
- Use the full filing and plan materials for fees, benefits, and eligibility questions.
Form 5500 is a public plan-level filing. It does not determine an individual benefit, account balance, fee, or investment outcome.
This guide combines editorial explanation with figures pulled directly from PlainRetire's Form 5500 database; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-08-25.