401(k) · DOL Form 5500 · 2022
William Blair & Company, LLC 401(k) Plan
Data updated 2026-08-11
- $886M
- Total assets
- 1,812
- Participants
- 99th
- Percentile by assets
- $488,930
- Avg per participant
Official DOL plan name: William Blair 401(k) and Profit Sharing Plan · Sponsored by William Blair & Company, LLC · Illinois · Finance & Insurance
$886M in assets, 1,812 participants
William Blair & Company, LLC's William Blair 401(k) and Profit Sharing Plan reported $886M in total assets and 1,812 participants in its 2022 DOL Form 5500 filing, ranking in the 99th 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.
- 99th percentile by assets (of 139,126 plans)
- #9,039 in Finance & Insurance (9,261 peers)
Coverage in Illinois
William Blair 401(k) and Profit Sharing Plan covers 1,812 participants in Illinois, 2.3x the typical Illinois plan (state average ~779 per filing). Assets: $886M.
- $886M
- total plan assets (2022 EOY)
- 1,812
- covered participants
- 99th
- percentile by assets (of 139,126 plans)
- $488,930
- avg assets per participant
The plan reported a net loss of $167M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.
Participants vs Illinois filers
In Illinois, the average filing covers about 779 participants across 5,745 plans. William Blair 401(k) and Profit Sharing Plan reports 1,812 participants - 2.3x that state average ($886M EOY assets).
Illinois filing particulars
| Total Assets (Beginning of Year) | $1.1B |
|---|---|
| Net Assets (End of Year) | $886M |
| Net Income | -$167M |
| Employer EIN | 362214610 |
| Plan Effective Date | 1953-12-14 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (William Blair & Company, LLC)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 1,812 | $886M |
| 2023 | 1 | 1,979 | $1.1B |
| 2024 | 1 | 1,816 | $1.2B |
Nearby 401(k) Plans in Illinois
Peer 401(k) plans, same state, same plan type, ranked by total assets.
William Blair 401(k) and Profit Sharing Plan vs. nearby 401(k) plans in Illinois, assets vs. participants
- State Farm 401(k) Savings Plan $14.7B · 53,616
- Accenture United States 401(k) Match and Savings Plan $14.3B · 66,653
- Abbott Laboratories Stock Retirement Plan $13.3B · 36,136
- United Airlines Pilot Retirement Account Plan $11.8B · 13,437
- Walgreens Retirement Savings Plan $11.7B · 238,072
Similar-Sized 401(k) Plans Nationally
401(k) plans in other states closest to William Blair 401(k) and Profit Sharing Plan by total assets, not by location.
- Speedway Retirement Readiness Plan (OH) $887M · 29,586
- Teradyne, Inc. Savings Plan (MA) $883M · 1,957
- Commerce Bancshares, Inc. Participating Investment Plan (MO) $883M · 4,469
- Oncor Thrift Plan (TX) $883M · 4,530
Frequently Asked Questions
How did William Blair 401(k) and Profit Sharing Plan assets move in 2022? ▼
How have William Blair & Company, LLC plan assets changed over time? ▼
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Filing takeaways
Ways to act on William Blair 401(k) and Profit Sharing Plan's numbers.
- By total assets, William Blair 401(k) and Profit Sharing Plan ranks among the largest 1% of all filed plans. See the largest plans
- Compare it side-by-side against 3 similar 401(k) plans in Illinois. Compare plans
- William Blair & Company, LLC's sponsor-wide assets have grown 34.8% since 2022 across 3 plan years on file. More Finance & Insurance plans