Third-quarter revenue rose 6.7% at Barrett Business Services Inc. (NASD: BBSI), a Vancouver, Wash.-based provider of PEO and staffing services. However, the company  lowered its outlook for “gross revenue” over the next 12-month period to 14% from 15% citing “slight headwinds in staffing and a continued tightening of the labor market.”

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“Strong continued performance yielded record earnings in the third quarter,” said President and CEO Michael Elich. “Additionally, we delivered solid growth marked by the addition of 169 net new PEO clients. Our top-line growth was slightly impacted by one less work day in the third quarter when compared to the same quarter last year. This tempered our revenue growth rate and same-customer sales, which came in at 5.9%. However, when adjusting for this difference, our non-GAAP gross revenues increased by 13% and same-customer sales were up 8.4%.”

Revenue by segment

<Header>Share price and market cap

Shares in Barrett Business Services rose 1.69% to $60.51 as of 12:47 p.m. Eastern time. The company had a market cap of $441.48 million.