UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2019 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period From to Commission File Number 0-21886 BARRETT BUSINESS SERVICES, INC. (Exact name of registrant as specified in its charter) Maryland 52-0812977 (State or other jurisdiction of ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2019 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Transition Period From to Commission File Number 0-21886 BARRETT BUSINESS SERVICES, INC. (Exact name of registrant as specified in its charter) Maryland 52-0812977 (State or other jurisdiction of ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 Commission File Number 0-21886 BARRETT BUSINESS SERVICES, INC. (Exact name of registrant as specified in its charter) Maryland 52-0812977 (State or other jurisdiction of (IRS Employer incorporation or organization) Identification No.) 8100 NE Parkway Drive, Suite 200 Vancouver, Washington 98662 (Ad ...

Barrett Business Services, Inc. (NASDAQ:BBSI) Q4 2018 Earnings Conference Call February 27, 2019 12:00 PM ET Company Participants Gary Kramer – Chief Financial Officer Michael Elich – President and Chief Executive Officer Conference Call Participants Jeff Martin – ROTH Capital Chris Moore – CJS Josh Vogel – Sidoti Bill Dezellem – Tieton Operator Good day, everyone, and thank you for participating in today’s conference call to discuss BBSI’s financial results for the Fourth Quarter and Full Year ended Decemb ...