Delaware 401(k) plans
186
Large 401(k) plans headquartered in Delaware are in 401(k) Monitor’s published set, holding $34.5B in total, led on headcount by AstraZeneca Savings And Security Plan with 17,843 active participants. Computed from DOL Form 5500 filings, plan years 2024–2025.
State means the sponsor’s address on the filing, not where employees work. Our published set covers 57,824 of the 57,824 large plans in the form-year-2024 DOL EFAST2 bulk data, so this is the largest-plan end of Delaware, not a census of it.
10 of the biggest 401(k) plans headquartered in Delaware
| # | Plan | City | Active participants | Assets |
|---|---|---|---|---|
| 1 | AstraZeneca Savings And Security Plan | Wilmington | 17,843 | $8.6B |
| 2 | Lululemon Savings Plan | Wilmington | 16,468 | $219.2M |
| 3 | Retirement Savings Plan | Wilmington | 9,508 | $7.0B |
| 4 | Dupont Retirement Savings Plan | Wilmington | 8,970 | $3.4B |
| 5 | Wl Gore & Associates, Inc. 401(k) Plan | Newark | 8,777 | $2.0B |
| 6 | Aaa Club Alliance Inc. 401(k) Retirement Savings Plan | Wilmington | 5,447 | $562.4M |
| 7 | Bayhealth Medical Center, Inc. Retirement And Savings Plan | Dover | 4,619 | $539.1M |
| 8 | Atkinsrealis US Retirement Savings Program | Wilmington | 4,326 | $894.6M |
| 9 | Chemours Company Retirement Savings Plan | Wilmington | 4,026 | $964.8M |
| 10 | Solenis, LLC Employee Savings Plan | Wilmington | 3,182 | $631.1M |
Every Delaware plan, by size
The table above is the top of the list. These 4 pages hold all 186 plans on file from Delaware, split by how many people are in them, each ranked by active participants.
- 100 to 499 participants · 132 plans
- 500 to 999 participants · 24 plans
- 1,000 to 4,999 participants · 18 plans
- 5,000 or more participants · 12 plans
401(k) fees in Delaware vs the national median
| Delaware medianAcross the 175 Delaware plans in our set with usable fee data. | $156.67 per participant |
|---|---|
| National medianAcross 54,783 published plans with usable fee data. | $122.17 per participant |
| Difference | $34.50 above the national median |
Plan-paid means fees the plan itself reports on Schedule H; many employers pay providers directly, which a filing reports as $0. How to judge your own plan: are your 401(k) fees high?
Useful links
- All states
Plan counts, fees and largest plans, state by state.
- The largest 401(k) plans in the US
The national ranking these state tables are drawn from.
- Average 401(k) fees by plan size
Fees depend on plan size more than on state.
Cite: 401(k) Monitor, “Delaware 401(k) plans: largest plans and fees”, computed from DOL EFAST2 Form 5500 bulk data, plan years 2024–2025, published set of 57,824 plans, data as of July 28, 2026.