Press Release


SIA’s 22nd Annual Ranking of Largest US Staffing Firms

Combined US revenue of $80 billion

Mountain View, California — July 19, 2017 — Staffing Industry Analysts (SIA), the global advisor on staffing and workforce solutions, has released its 2017 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 2016. This is SIA's 22nd annual report on the largest US staffing firms.

“This report showcases those companies who have grown their business to the top of the industry in terms of revenue and growth,” said Barry Asin, President of SIA. “The 144 companies comprising the list generated a combined revenue of $80.0 billion in 2016 and their success illustrates the continued growth and adoption of staffing in the US.”

The report features 144 companies, in an increase over the 134 firms included in last year’s report. Sixteen firms are included that did not appear in last year’s ranking.

At the top of the ranking again this year, the privately-held, Maryland-based Allegis Group headed the report for the eleventh consecutive time, with $8.9 billion in staffing revenue and 6.5% market share. Randstad Holding, previously listed third, placed in the number two spot this year, swapping positions with Adecco. Robert Half International moved from fifth to fourth; and Kelly Services regained footing in the top 5, where it had appeared in the 2015 list, as the fifth largest staffing firm in the US.

The 5 largest US staffing firms are:

Company 2016 US Staffing Revenue ($millions) Market Share Headquarters Country
Allegis Group 8,928 6.5% USA
Randstad Holding 4,674 3.4% The Netherlands
Adecco 4,597 3.4% Switzerland
Robert Half International 3,546 2.6% USA
USA Kelly Services 3,402 2.5% USA

“This report showcases the continuing success of many types of staffing firms in the US, each with their own strategic niche,” said Timothy Landhuis, Research Manager for SIA. “A particularly bright spot in 2016 was the impressive growth among healthcare staffing firms, consistent with the trends we have been reporting in our research. This year’s report includes 26 healthcare-focused staffing firms, up from 20 firms in last year’s report and 17 firms two years ago. We also note that among the top 20 largest on our list, four firms are healthcare staffing firms.”

Industrial and IT skill segments were the largest temporary staffing skill segments by revenue for 45 and 43 companies respectively this year.

The full 2017 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, +1 650-390-6171 |


Add New Comment

Post comment

NOTE: Links will not be clickable.