As contingent workforce program managers examine their supplier pipelines to see where additions, consolidations or other shifts might be beneficial, Staffing Industry Analysts’ Largest Staffing Firms in the United States: 2023 Update report can help.

Enterprise buyers can use the report to review current supplier partners that may be included on the list or to identify some suppliers that they may be considering engaging with. It saves time for program managers by providing a big picture in one report with vetted information for each firm, including estimated 2022 staffing revenue, market share, largest skill segments supplied and other details.

The 2023 update, released June 5, comprises 251 staffing firms with $100 million or more in US revenue, up from 225 last year. Healthcare staffing firms represented 30% of the firms on the list, followed by IT staffing providers and industrial staffing providers at 28% and 25%, respectively.

“With 251 companies in this year’s report of staffing firms over $100 million in US revenue, this market share analysis provides by far the largest and most comprehensive listing that we have ever produced highlighting the diverse landscape of US staffing. While the industry overall is quite fragmented, with more than 20,000 staffing firms in the US, the companies listed account for over three-quarters of US staffing market revenue,” said SIA President Barry Asin. “Additionally, this report highlights the growth of the industry, as the number of firms over $100 million has grown from just 98 in 2010 to 225 in 2021 and now to more than 250 last year.”

Allegis Group, based in Hanover, Maryland, ranked as the largest US staffing firm. It was followed by Aya Healthcare, a San Diego-based healthcare staffing firm.

Five largest US staffing firms:

Of the firms on the list, California was home to the US corporate headquarters of 23 firms on the list. It was followed by Georgia, headquarters for 22, and New Jersey, headquarters for 21.

Staffing revenue in the report includes temporary staffing, direct hire and retained search as well as temp-to-hire conversions. It does not include other types of workforce solutions ecosystem revenue such as MSP, RPO, payrolling or outplacement.

Revenue figures in the report represent SIA’s best estimation based on available information at the time of publication. The accuracy of estimates may vary depending on multiple factors, including firms’ willingness to provide or confirm information about their operations.

The full Largest Staffing Firms in the United States: 2023 Update report is available to SIA’s CWS Council members.