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

May 12, 2026 3:58 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 25,203,090 Common Stock of Barrett Business Services Inc. (the "Issuer") outstanding as of February 11, 2026, as reported in the Issuer's 10-K filed with the Securities and Exchange Commission on February 26, 2026.


SCHEDULE 13G



Mawer Investment Management Ltd.
Signature:/s/ John Wilson
Name/Title:John Wilson, Portfolio Manager
Date:05/01/2026

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