TrueBlue Inc. (NYSE: TBI) ranked as the largest US industrial staffing firm in terms of industrial staffing revenue, according to Staffing Industry Analysts' annual list of largest US industrial staffing firms. Express Employment Professionals ranked No. 2 and Aerotek ranked No. 3.

The list is based on 2014 industrial staffing revenue in the US. TrueBlue’s revenue included its acquisition of Seaton Corp. in the second quarter of 2014.

The list includes 32 staffing firms with more than $100 million in US industrial staffing revenue. The companies are ranked by revenue, according to industry custom. However, this ranking should not be taken to imply that a firm with a higher rank provides better service or more value to its shareholders.

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

1. TrueBlue: $2.30 billion
2. Express Employment Professionals: $2.07 billion
3. Aerotek (Allegis Group): $1.85 billion
4. Manpower: $1.72 billion
5. Select (New Koosharem Corporation): $1.67 billion

Select (New Koosharem Corporation) acquired EmployBridge in the first quarter of 2015, and EmployBridge is also among the largest industrial staffing firms in the US.

Corporate members of Staffing Industry Analysts can download the full report by clicking here.