About Milliman
<p>Recordkeeping and retirement plan administration are core services at this independent actuarial and consulting firm. Founded in 1947, it works with employers and plan sponsors on day-to-day plan operations and participant recordkeeping.</p> <p>Milliman is headquartered in Seattle in the Puget Sound region and supports plans across the U.S. As of 2025, the firm reports 1,059 clients and $140.5B in AUM.</p> <p>With a staff of about 3,500 employees, Milliman combines plan administration with actuarial and consulting depth, which can be useful for sponsors that want recordkeeping backed by in-house technical resources rather than a pure-play provider.</p> <ul> <li>Retirement plan recordkeeping</li> <li>Plan administration support</li> <li>Actuarial and consulting services tied to retirement plans</li> <li>Works alongside other <a href="/retirement-plans">retirement plan providers</a> as needed</li> </ul>
Website: https://milliman.com
Founded: 1947
Employees: 3500
Office Locations
- Seattle, WA (Headquarters)
Services Offered
- Recordkeeping
Client Statistics (2025)
- Total Clients: 1,463
- Total AUM: $140.5B
- Total Participants: 1,969,305
Plans Serviced (2025)
Largest plans where this firm is listed as a service provider (Schedule C) or IQPA (Schedule H) on the most recent filings (From Form 5500).
| Plan | Sponsor | Assets | Participants |
|---|---|---|---|
| WESTERN CONFERENCE OF TEAMSTERS PENSION PLAN | WESTERN CONFERENCE OF TEAMSTERS PENSION TRUST FUND BOARD OF TRUSTEES, WA | $55.8B | 231,353 |
| CENTRAL STATES, SOUTHEAST & SOUTHWEST AREAS PENSION PLAN | TRUSTEES OF CENTRAL STATES, SE AND SW AREAS PENSION FUND, IL | $38.3B | 38,102 |
| KAISER PERMANENTE RETIREMENT PLAN | KAISER FOUNDATION HEALTH PLAN, INC., CA | $34.4B | 140,357 |
| KAISER PERMANENTE 401(K) RETIREMENT PLAN | KAISER FOUNDATION HEALTH PLAN, INC., CA | $22.5B | 155,687 |
| SAMMONS ENTERPRISES, INC. EMPLOYEE STOCK OWNERSHIP PLAN | SAMMONS CORPORATION, TX | $21.2B | 3,273 |
| 401(k) Retirement Plan | Healthcare Sponsor, CA | $17.5B | 28,573 |
| 401(k) Retirement Plan | Manufacturing Sponsor, TX | $17.0B | 74,221 |
| 401(k) Retirement Plan | Professional Services Sponsor, NY | $16.1B | 115,036 |
| 401(k) Retirement Plan | Technology Sponsor, CA | $13.8B | 80,148 |
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