Ranked by worldwide benefit consulting revenues*
| Rank | Company | Benefit consulting revenue 2008 |
| 1 | Mercer L.L.C. | $1,916,014,000 |
| 2 | Watson Wyatt Worldwide | $1,524,000,000 |
| 3 | Hewitt Associates Inc. | $1,094,323,000 |
| 4 | Deloitte Consulting L.L.P. | $1,004,418,920 1 |
| 5 | Aon Consulting Worldwide | $998,095,000 |
| 6 | Towers Perrin | $901,462,000 |
| 7 | PricewaterhouseCoopers Human Resource Services | $840,000,000 |
| 8 | Buck Consultants, an ACS company | $430,000,000 2 |
| 9 | Ernst & Young L.L.P.-Performance Reward & Human Capital | $321,413,000 |
| 10 | Alexander Forbes Ltd. | $267,929,300 3, 4 |
*Excludes revenues from claims administration, compensation consulting, insurance commissions and other nonbenefit services including brokering and placement of benefits.
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| Source: BI survey Researched by Kevin Edison and Karen Tucker |
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World's largest employee benefit consultants 2009
