Tetra Tech appoints CEO Roger R. Argus to board; Batrack becomes Executive Chairman

TETRA TECH INC

Roger R. Argus appointed to Board of Directors effective Feb 19, 2026, following his promotion to CEO earlier in February.
Dan L. Batrack signed filing as Executive Chairman, indicating transition from CEO role.
All six director nominees elected with support from over 88% of votes cast; advisory say-on-pay approved with 92.2% for.
Amendment to Employee Stock Purchase Plan approved (99.5% for); PricewaterhouseCoopers ratified as auditor for fiscal 2026.
Board now has seven members; Argus will not serve on any committee.

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