Press Release


SIA Ranks Largest US Staffing Firms for 2016

134 staffing firms now over $100 million in US revenue

Mountain View, California — June 29, 2016 — Staffing Industry Analysts (SIA), the global advisor on staffing and workforce solutions, yesterday released its 2016 report on the Largest Staffing Firms in the United States. Ranked by revenue, the report covers firms that generated at least $100 million in US staffing revenue in 2015. This is the 21st annual report on the largest US staffing firms.

“This report is our largest ever revenue and market share estimate for staffing firms in the United States,” said SIA President Barry Asin. “The 134 firms represented in the report highlight the growth and diversity of the US staffing industry."

The report features 134 companies, in an increase over the 122 firms included in last year’s report.  Although four companies from the 2015 report no longer appear due to acquisition, nineteen additional staffing companies have broken through the $100 million revenue barrier.

The Allegis Group headed the report again this year with $8.6 billion in staffing revenue and 6.5% market share. A privately-held firm, the Allegis Group remains the market share leader for the tenth year in a row. Adecco, Randstad Holding and ManpowerGroup also retained their rankings from last year, with Robert Half International swapping its previously held sixth spot with Kelly Services to round out the top five for 2016. Another notable shift this year was Employ Bridge Holding Company’s move up to seventh position this year after combining with The Select Family of Staffing Companies.

The 5 largest US staffing firms are:

Company 2015 US Staffing Revenue ($millions) US Market Share
Allegis Group 8,633 6.5%
Adecco 4,627 3.5%
Randstad Holding 4,625 3.5%
ManpowerGroup 3,540 2.7%
Robert Half International 3,481 2.6%

“The companies featured in this year’s report generated a combined $75.7 billion in U.S. staffing revenue last year,” said Timothy Landhuis, Research Manager for SIA. “This marks a solid increase from the $69.4 billion of 2014 revenue featured in last year’s report, and provides evidence of overall growth in staffing revenue among large firms. To cite one example of a segment where growth was apparent, this year’s report contains 20 companies with a healthcare staffing focus that, added together, generated $7.3 billion.”

Industrial and IT skill segments were the largest temporary staffing skill segments by revenue for 43 and 40 companies respectively this year.

The full 2016 Largest Staffing Firms in the United States report is available for SIA’s Corporate and CWS Council Members.

About Staffing Industry Analysts (SIA)

SIA is the Global Advisor on Staffing and Workforce Solutions
Elevating the Workforce Solutions Ecosystem
Founded in 1989, SIA is the global advisor on staffing and workforce solutions. Our proprietary research covers all categories of employed and non-employed work including temporary staffing, independent contracting and other types of contingent labor. SIA’s independent and objective analysis provides insights into the services and suppliers operating in the workforce solutions ecosystem including staffing firms, managed service providers, recruitment process outsourcers, payrolling/compliance firms and talent acquisition technology specialists such as vendor management systems, online staffing platforms, crowdsourcing and online work services. We also provide training and accreditation with our unique Certified Contingent Workforce Professional (CCWP) program.

Known for our award-winning content, data, support tools, publications, executive conferences and events, we help both suppliers and buyers of workforce solutions make better-informed decisions that improve business results and minimize risk. As a division of the international business media company, Crain Communications Inc., SIA is headquartered in Mountain View, California, with offices in London, England.

Media Contact
Jennifer Arcuni, Communications Director, Staffing Industry Analysts, 650-390-6171 |


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