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Form SCHEDULE 13G/A BARRETT BUSINESS SERVICE Filed by: Mawer Investment Management Ltd.

August 6, 2026 5:17 PM





Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)




schemaVersion:


SCHEDULE 13G




Comment for Type of Reporting Person: Based upon 24,559,649 Common Stock of Barrett Business Services, Inc. (the "Issuer") outstanding as of April 22, 2026, as reported in the Issuer's 10-Q filed with the Securities and Exchange Commission on May 7, 2026.


SCHEDULE 13G



Mawer Investment Management Ltd.
Signature:/s/ John Wilson
Name/Title:Portfolio Manager
Date:08/05/2026

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