401(k) · DOL Form 5500 · 2024

Arthur J. Gallagher (Illinios), LLC. 401(k) Plan

Data updated 2026-08-25

$3.9B
Total assets Very large vs avg
23,247
Participants Very large workforce
100th
Percentile by assets National rank
$167,678
Avg per participant Above avg balance/head
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Official DOL plan name: Arthur J. Gallagher & Co. Employees Savings and Thrift Plan · Sponsored by Arthur J. Gallagher (Illinios), LLC. · Illinois · Finance & Insurance

$3.9B in assets, 23,247 participants

Arthur J. Gallagher (Illinios), LLC.'s Arthur J. Gallagher & Co. Employees Savings and Thrift Plan reported $3.9B in total assets and 23,247 participants in its 2024 DOL Form 5500 filing, ranking in the 100th 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.

  • #8,478 in Finance & Insurance (8,549 peers)

Coverage in Illinois

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan covers 23,247 participants in Illinois, 30x the typical Illinois plan (state average ~779 per filing). Assets: $3.9B.

#8,478
in Finance & Insurance (8,549 peers)
+20.4%
assets growth YoY
39×
vs typical plan assets (national mean)

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan's outsized position by total assets

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan vs every filed plan by assets

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

$3,898,012,907 Highest reported value at or above every one 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

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan's mega-plan peer group by participant headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Arthur J. Gallagher & Co. Employees Savings and Thrift Plan is a mega filing (23,247 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Arthur J. Gallagher & Co. Employees Savings and Thrift Plan end-of-year assets rose from $3.2B in the plan year 2023 filing to $3.9B in the plan year 2024 filing.
  • Arthur J. Gallagher & Co. Employees Savings and Thrift Plan reported net income rose from $455M in the plan year 2023 filing to $547M in the plan year 2024 filing.
  • Arthur J. Gallagher & Co. Employees Savings and Thrift Plan reported participants rose from 20,416 in the plan year 2023 filing to 23,247 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 362481781 · Arthur J. Gallagher (Illinios), LLC. PY 2024 · 401(k)

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan · $3.9B · 23,247 · 100th

  • EBSA $3.9B
  • EBSA 23,247
  • EBSA 100th
  • EBSA 401(k)
  • EBSA near Firstenergy Corp. Savings Plan
  • EBSA ind #8478

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 Finance & Insurance retirement plans → · Plans in Illinois →

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan in the asset neighbourhood

The 401(k) Plan$3.9BArthur J. Gallagher & Co. Employees Savings and Thrift PlanArthur J. Gallagher & Co. Em…$3.9BFirstenergy Corp. Savings PlanFirstenergy Corp. Savings Pl…$3.9BThe Caci Smart Plan$3.9BKellogg Brown & Root, Inc. Retirement and Savings PlanKellogg Brown & Root, Inc. R…$3.9B
End-of-year total assets ($B) among Arthur J. Gallagher & Co. Employees Savings and Thrift Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Illinois filing particulars

Total Assets (Beginning of Year)$3.2B
Net Assets (End of Year)$3.9B
Net Income$547M
Employer EIN362481781
Plan Effective Date1966-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Arthur J. Gallagher (Illinios), LLC.)

Sponsor-wide plan assets over time

All Arthur J. Gallagher (Illinios), LLC. plans reported in each filing year

Latest sponsor-wide plan assets
$4.2B 40.72713223591857% vs 2022
2024 filing year
$2.5B$3B$3.5B$4B$4.5B 202220232024 $2.99B $4.21B ▲ +40.8%
Year Plans Participants Total Assets
2022 2 19,846 $3.0B
2023 2 21,466 $3.5B
2024 2 24,229 $4.2B

Nearby 401(k) Plans in Illinois

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

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan vs. nearby 401(k) plans in Illinois, assets vs. participants Scatter plot of 6 data points. 050000100000150000200000250000 0510152025 Total assets ($B) Participants Arthur J. Gallagher & Co. Employees Savings and Thrift Plan, Total assets ($B): 3.898012907 · Participants: 23247Arthur J. Gallagher & Co. Employees Savings and Thrift PlanAccenture United States 401(k) Match and Savings Plan, Total assets ($B): 21.302643276 · Participants: 66965Accenture United States 401(k) Match and Savings PlanState Farm 401(k) Savings Plan, Total assets ($B): 19.010099056 · Participants: 63297State Farm 401(k) Savings PlanUnited Airlines Pilot Retirement Account Plan, Total assets ($B): 16.835964452 · Participants: 16659United Airlines Pilot Retirement Account PlanAbbott Laboratories Stock Retirement Plan, Total assets ($B): 15.755668 · Participants: 38229Abbott Laboratories Stock Retirement PlanWalgreens Retirement Savings Plan, Total assets ($B): 14.535873337 · Participants: 233635Walgreens Retirement Savings Plan
Arthur J. Gallagher & Co. Employees Savings and Thrift Plan vs. nearby 401(k) plans in Illinois, assets vs. participants
Compare Arthur J. Gallagher & Co. Employees Savings and Thrift Plan side-by-side with 3 peers →

Scale composition for Arthur J. Gallagher & Co. Employees Savings and Thrift Plan

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan reports $3.9B in end-of-year assets across 23,247 participants (0.032% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.025% of 93,925,755 covered participants) - about $167,678 per participant (1.2x the national average assets-per-participant) . Net income for plan year 2024 was $547M.

This plan identity (EIN 362481781, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $2.8B to $3.9B (+40.2%) while covered participants moved from 18,665 to 23,247 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 18,665 $2.8B Open filing
2023 20,416 $3.2B Open filing
2024 · index core 23,247 $3.9B This page

The same sponsor also keeps 1 other index-core plan on PlainRetire:

Arthur J. Gallagher & Co. Employees Savings and Thrift Plan's out-of-state 401(k) peers by assets and headcount

Outside Illinois, the nearest 401(k) by assets is Firstenergy Corp. Savings Plan in OH ($3.9B); by covered participants it is Takeda Pharmaceutical U.S.a., Inc. Savings and Retirement Plan in MA (23,253 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($3.9B here).

Similar participant headcount

Nearest other-state filings by covered participants (23,247 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 Arthur J. Gallagher & Co. Employees Savings and Thrift Plan assets move in 2024? ▼
Arthur J. Gallagher & Co. Employees Savings and Thrift Plan grew sharply - up 20.4% during 2024, from $3.2B to $3.9B. Reported net income was $547M.
How have Arthur J. Gallagher (Illinios), LLC. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Arthur J. Gallagher (Illinios), LLC.'s sponsor-wide assets grew 40.7%, from $3.0B to $4.2B.
Where does Arthur J. Gallagher & Co. Employees Savings and Thrift Plan rank by assets among Form 5500 filers? ▼
Arthur J. Gallagher & Co. Employees Savings and Thrift Plan ranks in the 100th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (among the largest 1% of all filed plans).
Which 401(k) plans are similar in size to Arthur J. Gallagher & Co. Employees Savings and Thrift Plan? ▼
Among 401(k) plans in other states, the closest by assets is Firstenergy Corp. Savings Plan in OH ($3.9B, 12,582 participants).
Which 401(k) plans cover a similar participant headcount to Arthur J. Gallagher & Co. Employees Savings and Thrift Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Takeda Pharmaceutical U.S.a., Inc. Savings and Retirement Plan in MA (23,253 participants, $6.2B 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 362481781.

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.