Staffing Industry Analysts today released its annual list of largest US staffing firms, which included 122 staffing firms with US staffing revenue of more than $100 million.

The five largest firms in the US by 2014 staffing revenue are:

1. Allegis Group, $8.29 billion
2. Adecco, $4.50 billion
3. Randstad Holding, $4.40 billion
4. ManpowerGroup $3.82 billion
5. Kelly Services, $3.29 billion

Read more here.

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Some summer reading for those looking to be better leaders over at TED, recommended by Thu-Huong Ha.