South Dakota Employer EIN Lookup
Use this South DakotaEIN lookup to find an employer’s Employer Identification Number from its public Form 5500 filing. 2,219 employers based in South Dakota have filed a Form 5500, covering 2,682 retirement and health plans with $11.8B in reported assets. The largest are listed below with their EIN — open any employer to see the full filing.
Employers
2,219
Plans
2,682
Total assets
$11.8B
Largest employers in South Dakota by EIN
Form 5500 search →| Employer | EIN | City | Plans | Participants | Assets |
|---|---|---|---|---|---|
| Black Hills Corporation | 46-0458824 | Rapid City | 6 | 9,801 | $1.2B |
| Monument Health, Inc. | 20-1487506 | Rapid City | 2 | 7,953 | $469.5M |
| The Evangelical Lutheran Good Samaritan Society | 45-0228055 | Sioux Falls | 1 | 9,879 | $319.6M |
| POET Biorefining LLC | 47-4454378 | Sioux Falls | 2 | 4,451 | $265.7M |
| Daktronics, Inc. | 46-0306862 | Brookings | 2 | 4,408 | $262.6M |
| First Premier Bank | 46-0119480 | Sioux Falls | 2 | 3,288 | $240.6M |
| Advisortrust, Inc. | 46-4091337 | Sioux Falls | 7 | 7,451 | $201.5M |
| Pathward, National Association | 42-0747941 | Sioux Falls | 2 | 2,327 | $173.7M |
| Showplace Wood Products, Inc. | 46-0453066 | Harrisburg | 3 | 1,780 | $139.0M |
| First Bank & Trust | 46-0187030 | Brookings | 1 | 725 | $129.3M |
| RE/SPEC Inc. | 46-0315848 | Rapid City | 3 | 1,530 | $112.4M |
| The First National Bank in Sioux Falls | 46-0189380 | Sioux Falls | 2 | 537 | $110.2M |
| Yankton Medical Clinic P.C. | 46-0363830 | Yankton | 2 | 596 | $107.2M |
| Dacotah Banks, Inc. | 46-0279766 | Aberdeen | 3 | 1,800 | $107.0M |
| Performance Bankers, Inc. | 46-0373528 | Pierre | 6 | 3,441 | $101.2M |
| AGC of South Dakota | 99-1294972 | Sioux Falls | 1 | 1,873 | $96.0M |
| Sonifi Solutions, Inc. | 46-0371161 | Sioux Falls | 3 | 1,844 | $95.2M |
| First Dakota Financial Corporation | 46-0402899 | Yankton | 1 | 368 | $93.2M |
| CNOS, PC | 42-1480644 | Dakota Dunes | 2 | 615 | $86.6M |
| Assoc. General Contractors of SD, Inc. Building | 46-0106838 | Sioux Falls | 1 | 1,328 | $84.1M |
| Empirical Technology, Inc. | 94-2740498 | Dakota Dunes | 5 | 4,621 | $84.0M |
| Agtegra Cooperative | 46-0191930 | Aberdeen | 2 | 1,702 | $78.5M |
| Rapid City Medical Center, LLP | 46-0218851 | Rapid City | 3 | 1,052 | $74.6M |
| Orthopedic Institute | 46-0316404 | Sioux Falls | 2 | 462 | $74.0M |
| Billion Motors, Inc. | 46-0307139 | Sioux Falls | 5 | 3,662 | $71.9M |
| 1ST Financial Bank USA | 46-0133740 | Dakota Dunes | 2 | 480 | $71.5M |
| Vantage Point Solutions, Inc. | 22-3860061 | Mitchell | 3 | 1,244 | $71.3M |
| C&B Operations, LLC | 41-1992021 | Gettysburg | 2 | 1,700 | $68.9M |
| Trail King Industries, Inc. | 46-0320593 | Mitchell | 1 | 642 | $68.1M |
| Woods, Fuller, Shultz & Smith, PC | 46-0362286 | Sioux Falls | 1 | 73 | $66.6M |
| Valley Queen Cheese Factory, Inc. | 46-0220490 | Milbank | 5 | 1,262 | $66.5M |
| Prairie Lakes Healthcare System | 46-0391067 | Watertown | 6 | 4,663 | $62.0M |
| Fishback Financial Corporation | 46-0306542 | Brookings | 2 | 1,268 | $61.4M |
| Rosenbauer South Dakota, LLC | 46-0448012 | Lyons | 2 | 771 | $60.4M |
| Black Hills Federal Credit Union | 46-0235529 | Rapid City | 10 | 2,939 | $60.3M |
| South Dakota Council of Community Behavioral HEA | 46-0442372 | Pierre | 1 | 1,789 | $59.9M |
| VERN EIDE Motorcars, Inc. | 46-0281291 | Sioux Falls | 4 | 1,462 | $59.9M |
| Bankwest, Inc. | 46-0177475 | Pierre | 3 | 737 | $58.8M |
| Pete LIEN & Sons, Inc. | 46-0271589 | Rapid City | 2 | 774 | $57.3M |
| O'CONNOR Company, Inc. | 46-0332893 | Sioux Falls | 3 | 437 | $57.1M |
| Lewis Drugs, Inc. | 46-0212323 | Sioux Falls | 4 | 2,278 | $56.1M |
| Cortrust Bank NA | 46-0159100 | Mitchell | 2 | 527 | $54.7M |
| Grossenburg Implement, Inc. | 46-0320279 | Winner | 2 | 509 | $52.6M |
| Prince Manufacturing Corporation | 42-0678168 | North Sioux City | 5 | 848 | $51.7M |
| Heart Hospital of South Dakota, LLC Avera Heart Hospital South Dakota | 56-2143771 | Sioux Falls | 2 | 1,209 | $51.5M |
| Riddle's Group, Inc. | 46-0357804 | Rapid City | 2 | 938 | $48.1M |
| Harms Oil Company | 46-0342132 | Brookings | 3 | 653 | $47.5M |
| Risk Administration Services, Inc. | 46-0407236 | Sioux Falls | 2 | 421 | $47.1M |
| Innovative Systems, LLC | 41-1920375 | Mitchell | 1 | 202 | $46.5M |
| Bierschbach Equipment & Supply Co., Inc. | 46-0354180 | Sioux Falls | 1 | 79 | $46.0M |
| Davenport Evans Hurwitz & Smith LLP | 46-0235678 | Sioux Falls | 1 | 59 | $44.3M |
| MUTH Electric Inc. | 71-0893353 | Mitchell | 2 | 764 | $42.5M |
| Lifescape | 46-5151247 | Sioux Falls | 9 | 5,684 | $42.4M |
| Anesthesia Physicians, Ltd. | 46-0360629 | Sioux Falls | 2 | 42 | $42.2M |
| The Ramkota Companies, Inc. | 46-0282107 | Sioux Falls | 1 | 123 | $41.8M |
| Plains Commerce Bank | 46-0108210 | Sioux Falls | 1 | 447 | $37.8M |
| Vance Thompson Vision Clinic, PROF. LLC | 45-4527794 | Sioux Falls | 2 | 875 | $37.0M |
| Aerostar International, LLC | 46-0389205 | Sioux Falls | 2 | 447 | $36.9M |
| American Bank & Trust | 46-0108140 | Sioux Falls | 5 | 203 | $36.8M |
| Anesthesiology Associates, Inc. | 46-0418791 | Sioux Falls | 2 | 39 | $36.5M |
| South Dakota Network, LLC | 46-0454662 | Sioux Falls | 2 | 227 | $36.2M |
| Ketel Thorstenson, LLP | 46-0257538 | Rapid City | 2 | 268 | $35.5M |
| L.G. Everist, Incorporated | 46-0229601 | Sioux Falls | 7 | 2,758 | $34.7M |
| Furniture Mart USA, Inc. | 46-0346494 | Sioux Falls | 10 | 1,860 | $34.7M |
| Sioux Falls Specialty Hospital | 46-0382492 | Sioux Falls | 8 | 752 | $33.9M |
| Consumers Supply Distributing LLC | 45-3782648 | North Sioux City | 3 | 471 | $33.1M |
| Regency Hotel Management, LLC | 46-0434895 | Sioux Falls | 1 | 3,434 | $33.0M |
| Viaflex, Inc. | 61-1895716 | Sioux Falls | 2 | 863 | $32.9M |
| Karl's, Inc. | 46-0307274 | Gregory | 6 | 1,668 | $30.4M |
| Security First Bank | 47-0299375 | Rapid City | 2 | 490 | $29.7M |
| Gunderson, Palmer, Nelson & Ashmore LLP | 46-0333525 | Rapid City | 1 | 44 | $29.2M |
| Sterling Computers Corporation | 95-4634907 | North Sioux City | 2 | 591 | $28.8M |
| Huron Regional Medical Center, Inc. | 46-0345312 | Huron | 6 | 2,085 | $26.8M |
| GCC Dacotah, Inc. | 46-0460381 | Rapid City | 1 | 29 | $26.3M |
| Journey Group Companies | 46-0189350 | Sioux Falls | 8 | 1,450 | $26.1M |
| Sawmill Trust Company | 20-1660652 | Sioux Falls | 1 | 46 | $25.3M |
| Surgical Management Professionals, LLC | 20-2605266 | Sioux Falls | 1 | 383 | $25.2M |
| Avera Health Plans, Inc. | 46-0451539 | Sioux Falls | 1 | 401 | $24.3M |
| Mobridge Regional Hospital | 46-0255944 | Mobridge | 1 | 248 | $24.1M |
| Delta Dental Plan of South Dakota | 46-0309258 | Pierre | 1 | 81 | $23.9M |
| Physician's Laboratory, Ltd. | 46-0315398 | Sioux Falls | 1 | 40 | $23.8M |
| Madison Community Hospital | 46-0228038 | Madison | 5 | 667 | $23.6M |
| LEVO Federal Credit Union | 46-0225850 | Sioux Falls | 1 | 85 | $23.2M |
| Big Stone Therapies, Inc. | 45-4199100 | Big Stone City | 2 | 871 | $23.0M |
| First Fidelity Bank | 46-0115545 | Burke | 1 | 111 | $22.7M |
| GPAC, LLC | 46-0412636 | Sioux Falls | 1 | 288 | $22.3M |
| Pioneer Bank & Trust | 46-0108155 | Spearfish | 1 | 127 | $22.2M |
| Johnson Feed, Inc. | 46-0325358 | Canton | 2 | 505 | $21.8M |
| South Dakota Soybean Processors LLC | 46-0462968 | Volga | 5 | 846 | $21.8M |
| SHUR-Co, LLC | 27-4029187 | Yankton | 2 | 710 | $21.7M |
| University of Sioux Falls | 46-0224600 | Sioux Falls | 7 | 578 | $21.6M |
| Persona Signs, LLC | 87-4419557 | Watertown | 2 | 777 | $20.5M |
| Reliabank Dakota | 46-0133683 | Estelline | 1 | 92 | $20.4M |
| Pioneer Enterprises, Inc. | 46-0373405 | Sioux Falls | 1 | 83 | $20.3M |
| Childrens Home Society of South Dakota | 46-0224542 | Sioux Falls | 2 | 660 | $20.3M |
| Glacial Lakes | 46-0461664 | Watertown | 2 | 384 | $20.1M |
| GEIB, Elston, Frost, P.A. | 46-0273607 | Rapid City | 1 | 35 | $20.0M |
| Vision Care Associates LLP | 46-0363581 | Aberdeen | 1 | 115 | $19.8M |
| Bangs, McCullen, Butler, FOYE & Simmons, LLP | 46-0108128 | Rapid City | 1 | 33 | $19.8M |
| Lloyd Companies, Inc. | 83-2634703 | Sioux Falls | 2 | 722 | $19.7M |
EINs are drawn from the Form 5500 the employer filed with the U.S. Department of Labor. An employer’s EIN is the same across all of its plans — open a filing to confirm the sponsor name and address before relying on it.
How to find an employer’s EIN in South Dakota
Every employer that sponsors a retirement or health plan files a Form 5500 that lists its nine-digit Employer Identification Number. Find a South Dakota company in the table above, or run a Form 5500 search by company name to pull the filing and read the EIN directly from it.
For a broader view of plans in the state — including industry breakdowns and the largest plans by assets — see Form 5500 plans in South Dakota. New to these filings? Start with What is Form 5500?
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