TETRA TECH INC (TTEK) Institutional Ownership and Insiders Activity

TETRA TECH INC (TTEK) is widely held by institutional investors, with 531 firms reporting positions valued at approximately $7.17B based on SEC Form 13F filings for the quarter ended June 30, 2026.

Blackrock, Inc. is the largest disclosed holder, reporting approximately $828.43M in TTEK holdings in its latest filing.

Recent insider activity includes 1 tracked Form 4 transaction over the last three months, reflecting ongoing executive and director trading activity.