South Dakota 401(k) plans
187
Large 401(k) plans headquartered in South Dakota are in 401(k) Monitor’s published set, holding $6.5B in total, led on headcount by Good Samaritan Society 401(k) Plan with 10,778 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 South Dakota, not a census of it.
10 of the biggest 401(k) plans headquartered in South Dakota
| # | Plan | City | Active participants | Assets |
|---|---|---|---|---|
| 1 | Good Samaritan Society 401(k) Plan | Sioux Falls | 10,778 | $278.3M |
| 2 | 401(k) Simplified Flexible | Sioux Falls | 5,085 | $159.1M |
| 3 | Hotel Retirement Systems Profit Sharing Plan And Trust | Sioux Falls | 3,434 | $33.0M |
| 4 | Black Hills Corporation 401(k) Retirement Savings Plan | Rapid City | 2,830 | $811.2M |
| 5 | Poet 401(k) Plan | Sioux Falls | 2,397 | $265.7M |
| 6 | Daktronics, Inc. 401(k) Plan | Brookings | 2,305 | $262.6M |
| 7 | Associated General Contractors Of Sd 401(k) Profit Sharing Plan | Sioux Falls | 1,873 | $96.0M |
| 8 | South Dakota Associations Of Community-Based Human Services Retirement Plan | Pierre | 1,810 | $52.6M |
| 9 | Premier 401(k) Plan | Sioux Falls | 1,625 | $240.6M |
| 10 | Lewis Drugs, Inc. 401(k) Plan | Sioux Falls | 1,258 | $56.1M |
Every South Dakota plan, by size
The table above is the top of the list. These 4 pages hold all 187 plans on file from South Dakota, split by how many people are in them, each ranked by active participants.
- 100 to 499 participants · 135 plans
- 500 to 999 participants · 32 plans
- 1,000 to 4,999 participants · 18 plans
- 5,000 or more participants · 2 plans
401(k) fees in South Dakota vs the national median
| South Dakota medianAcross the 176 South Dakota plans in our set with usable fee data. | $145.57 per participant |
|---|---|
| National medianAcross 54,783 published plans with usable fee data. | $122.17 per participant |
| Difference | $23.40 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, “South Dakota 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.