Staffing Firm Lists & Market Share

2013 List of Largest U.S. Office/Clerical Staffing Firms

July 15, 2013

  • 14 firms generated at least $100 million in office/clerical revenue (42% of the market)
  • Top three:  Aerotek (Allegis Group), Randstad, Adecco

2013 List of Fastest-Growing US Staffing Firms

July 1, 2013

  • The list of fastest-growing U.S. staffing firms includes 92 firms that posted compound annual revenue growth rates of 15 percent or more.
  • The top 10 fastest-growing firms had a median growth rate of 73.8 percent.

2013 List of Largest U.S. IT Staffing Firms

June 27, 2013

  • 32 firms generated at least $100 million in U.S. IT staffing revenue, for a total of $13.7 billion (60% of the market)
  • Top four: TEKsystems (Allegis), On Assignment, Randstad Technologies, Experis (ManpowerGroup)
  • On Assignment climbs to number two ranking, after Apex Systems acquisition

2013 List of Largest U.S. Staffing Firms and Market Share Analysis

June 27, 2013

  • Largest US staffing firms generated $70.1 Billion in 2012, or 54% of the market
  • Firms on both last year and this year's list grew revenue an aggregate 6%
  • Large acquisitions fueled growth for On Assignment, ACS Group, TriNet, and inVentiv Health

Initial “Ecosystem Snapshot” of Solution/Service Providers to Staffing Firms – Spring 2013

April 24, 2013

  • Staffing firms depend on an ecosystem of solution/service providers (and vice-versa)
  • 200+  participated in SIA survey to begin to identify and characterize the ecosystem
  • Respondents spanned more than 20 solution/service types, including consulting, payroll, technology, M&A, marketing... More

Trends in U.S. staffing market concentration and staffing firm rankings, 2007-2011

February 6, 2013

  • Portion of U.S. staffing market captured by top fifteen largest firms steadily increased by average of +2.3 percentage points from 2007-2011
  • Many staffing segment markets experienced a significant increase in concentration during the recession (2008-2009)
  • Allegis Group and Adecco maintained their... More

2012 Largest-, Fastest-growing Lists’ Late Additions, Updates

October 31, 2012

  • Three new firms identified
  • Five submitted corrected revenue data

The 2012 Book of Lists: A complete collection of staffing firm rankings and lists

August 9, 2012

  • Compilation of all 24 SIA annual lists in one sortable Excel workbook
  • Ranks hundreds of staffing firms' staffing revenue domestically, globally, and by staffing sector
  • Opportunity lists: fastest-growing, diversity, mentors/proteges, acquirers

2012 List of Largest Canadian Staffing Firms

August 7, 2012

  • Lists 23 companies with at least C$50M in Canadian staffing revenue
  • Top two:  Randstad, Adecco
  • Companies on list cumulatively represent 53% of the Canadian staffing market

2012 List of Largest U.S. PEO Firms

August 6, 2012

  • Lists 18 companies with at least $50M in U.S. PEO revenue
  • Top two:  Insperity, Automatic Data Processing
  • Companies on list cumulatively represent 56% of U.S. PEO market