2024 plan-year Industry rank #14 of 21 DOL Form 5500

Administrative & Support Services Retirement Plans

4,704 ERISA-covered retirement plans in the Administrative & Support Services industry, holding $135.7B for 3,828,467 participants per 2024 Form 5500 filings.

$135.7B across 4,704 plans

According to DOL Form 5500 filings (plan year 2024), the Administrative & Support Services industry sponsors 4,704 ERISA-covered retirement plans holding $135.7B for 3,828,467 participants, ranking #14 of 21 industries by plan assets, with 77.1% structured as 401(k)s.

  • #14 of 21 industries
  • 77.1% 401(k) plans

The industry in one line

Administrative & Support Services sponsors 4,704 ERISA-covered retirement plans holding $135.7B for 3,828,467 participants, the 14th-largest industry by plan assets.

$135.7B
total plan assets
4,704
employer plans
$29M
average plan size
77.1%
of plans are 401(k)s
Plans
4,704
401(k) Plans
3,625
77.1% of plans
Total Assets
$135.7B
Participants
3,828,467

What the Administrative & Support Services Industry Plan Filings Show

The Administrative & Support Services industry sponsors 4,704 ERISA-covered retirement plans according to 2024 Form 5500 filings, ranking #14 of 21 industries on PlainRetire by total plan assets. Within the industry, 77.1% of plans are 401(k) defined-contribution arrangements (3,625 plans), with the remainder split across defined-benefit pension plans, profit-sharing arrangements, ESOPs, and money-purchase plans. The average plan in Administrative & Support Services holds $29M in end-of-year assets and covers 814 participants.

Industry-level totals reflect aggregate sponsor disclosures on Form 5500 Schedule H and Schedule I and provide a useful frame for benchmarking individual employer plans. They are not a substitute for plan-specific Summary Plan Description review when evaluating any single plan. Industry classification is self-reported by sponsors based on the primary economic activity of the sponsoring employer. Plans whose sponsor industry has changed across years (mergers, restructurings) carry the most-recent classification on file.

Plan Type Breakdown (Administrative & Support Services)

Plan Type Plans Participants Total Assets
401(k) 3,625 3,469,040 $102.6B
Defined Benefit (Pension) 83 219,152 $24.1B
ESOP 163 59,854 $4.1B
Profit Sharing 788 33,460 $2.8B
Money Purchase 18 15,732 $1.6B
Other 27 31,229 $602M

Largest Administrative & Support Services Plans by Assets

Top 30 Administrative & Support Services retirement plans ranked by 2024 end-of-year total assets.

# Plan Sponsor State Type Participants Assets
1 Building Service 32bj Pension Fund Board of Trustees of the Building Service 32bj Pension Fund NY Defined Benefit (Pension) 53,357 $4.6B
2 Waste Management Retirement Savings Plan Waste Management, Inc. TX 401(k) 38,676 $4.1B
3 Frontier Communications 401(k) Savings Plan Frontier Communications Parent, Inc. CT 401(k) 12,125 $2.9B
4 Republic Services, Inc. 401(k) Plan Republic Services, Inc. AZ 401(k) 32,629 $2.7B
5 Building Service 32bj Supplemental Retirement Savings Plan Board of Trustees of the Building Service 32bj Supplemental NY 401(k) 89,128 $2.6B
6 Allegis Group, Inc. Retirement Savings Plan One Allegis Group, Inc. MD 401(k) 24,457 $2.2B
7 Oasis Retirement Savings Plan Oasis Outsourcing Holdings, Inc. and Its Affiliates FL 401(k) 83,612 $2.1B
8 Credit Union Retirement Plan Association 401(k) Plan Credit Union Retirement Plan Association WI 401(k) 19,717 $2.1B
9 Retirement Program Plan for Employees of Consolidated Nuclear Security, LLC at the U.S. Department of Energy at Oak Ridge, Tennessee Consolidated Nuclear Security, LLC TN Defined Benefit (Pension) 2,516 $2.0B
10 Iuoe Stationary Engineers Local 39 Pension Plan Bot of Iuoe Stationary Engineers Local 39 Pension Plan CA Defined Benefit (Pension) 5,166 $2.0B
11 Enbridge Employee Services, Inc. Employees' Savings Plan Enbridge Employee Services, Inc. TX 401(k) 3,772 $1.8B
12 Expedia Retirement Savings Plan Expedia, Inc. WA 401(k) 8,260 $1.8B
13 S.E.I.U. National Industry Pension Fund Board of Trustees of the S.E.I.U. National Industry Pension Fund DC Defined Benefit (Pension) 95,567 $1.7B
14 Cushman & Wakefield 401(k) Plan Cushman & Wakefield MA 401(k) 23,593 $1.7B
15 Savings Program for Employees of Consolidated Nuclear Security, LLC at the U.S. Department of Energy Facilities at Oak Ridge, Tennessee Consolidated Nuclear Security, LLC TN 401(k) 6,683 $1.5B
16 Successwise Pooled Employer Plan Plan Professionals, LLC NJ 401(k) 62,004 $1.5B
17 G & a Partners Multiple Employer 401(k) Plan G & a Outsourcing, Inc. Dba G & a Partners TX 401(k) 35,058 $1.4B
18 Hanford Operations and Engineering Investment Plan Hanford Pension and Savings Plans Committee WA 401(k) 4,272 $1.3B
19 The Dun & Bradstreet Corporation 401(k) Plan The Dun & Bradstreet Corporation FL 401(k) 2,439 $1.3B
20 Coadvantage Corporation Retirement Savings Plan Coadvantage Corporation FL 401(k) 75,664 $1.2B
21 Hanford Multi-Employer Pension Plan Hanford Pension & Savings Plans Committee WA Defined Benefit (Pension) 1,432 $1.2B
22 Country/ Iaa 401(k) Plan Cc Services, Inc. IL 401(k) 3,624 $1.1B
23 Rollins 401(k) Savings Plan Rollins, Inc & Subsidiaries GA 401(k) 13,404 $1.1B
24 Enbridge Employee Services, Inc. Employees' Pension Plan Enbridge Employee Services, Inc. TX Defined Benefit (Pension) 3,603 $1.1B
25 Local No. 731, I.B. of T., Pension Fund Local No. 731, I.B. of T., Pension Fund IL Defined Benefit (Pension) 3,248 $1.1B
26 Sabre Glbl Inc. 401(k) Savings Plan Sabre Glbl Inc. TX 401(k) 2,493 $1.1B
27 The Dun & Bradstreet Corporation Retirement Account The Dun & Bradstreet Corporation FL Defined Benefit (Pension) 578 $1.0B
28 Vensure Employer Services, Inc. 401(k) Profit Sharing Plan Vensure Employer Services, Inc. AZ 401(k) 32,207 $982M
29 Local 68 Engineers Union Annuity Plan Local 68 Engineers Union Annuity Fund Board of Trustees NJ Money Purchase 5,385 $971M
30 Laborers District Council of W PA Pension Fund Laborers District Council of W PA Pension Fund Board of Trustees PA Defined Benefit (Pension) 6,882 $948M

Nationwide industries with similar retirement plan scale

Two DOL Form 5500-derived peer sets for Administrative & Support Services: nearest tracked industries by plan filing count (4,704 plans here) and nearest by aggregate plan assets ($135.7B here). Rows stay link-disjoint so each axis is a distinct neighborhood.

Similar plan count

Nearest other industries by reported employer plan filings.

Similar total assets

Nearest other industries by aggregate end-of-year plan assets (plan-count peers above are excluded).

Questions about Administrative & Support Services plans

How many retirement plans are in the Administrative & Support Services industry? ▼
Administrative & Support Services sponsors 4,704 ERISA-covered retirement plans according to 2024 Form 5500 filings, including 3,625 401(k) plans (77.1% of plans in the industry). Total assets across all plans in the industry sum to $135.7B, covering 3,828,467 participants.
What's the average plan size in the Administrative & Support Services industry? ▼
The average Administrative & Support Services retirement plan holds $29M in assets and covers 814 participants. This is an arithmetic mean across all 4,704 plans in the industry, actual plan sizes vary widely, with a small number of very large plans pulling the average up. See the table above for the largest plans by assets.
Where does this industry data come from? ▼
Industry classification comes from each plan sponsor's Form 5500 filing with the U.S. Department of Labor's Employee Benefits Security Administration (EBSA). Sponsors self-classify into one of approximately 20 industry categories based on the primary economic activity of the sponsoring employer. The category labels follow the DOL plan-sponsor industry taxonomy.
What plan types are most common in the Administrative & Support Services industry? ▼
In Administrative & Support Services, the most common plan type by total assets is 401(k) (3,625 plans, $102.6B in assets). Other common types include: Defined Benefit (Pension) (83), ESOP (163), Profit Sharing (788).

Related guides

See also these PlainRetire explainers for interpreting Form 5500 industry totals and comparing plans.

Explore from Administrative & Support Services

Other Services

Closest peer by total plan assets ($166.6B, 8,303 plans)
Building Service 32bj Pension Fund

Largest Administrative & Support Services plan on file · $4.6B
401(k)

Dominant type here by assets · 3,625 plans, $102.6B
All industries

Industry #14 of 21 by total Form 5500 plan assets

What to do with Administrative & Support Services plan data

4,704 plans across the Administrative & Support Services sector offer a baseline for benchmarking your own plan.

Industry classification is self-reported by plan sponsors on Form 5500. Plans may span multiple sectors.

Source: U.S. Department of Labor EBSA Form 5500 public-disclosure dataset, 2024 plan year. Industry classification self-reported by sponsors.

Reference: IRS Publication 560, Retirement Plans for Small Business.

Every figure on PlainRetire is rendered directly from the Department of Labor's Form 5500 annual return filings, no number 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.