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CIK 0000831641 · Large accelerated filer

TETRA TECH INC

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Ticker
TTEK
Exchange
Nasdaq
Industry
Services-Engineering Services
FY end
Sep 27
Incorporated
DE
Entity type
operating
EIN
954148514
Phone
6263514664
Business address
3475 EAST FOOTHILL BOULEVARD, PASADENA, CA, 91107
Open-market buys, last 90 days
$0
in 0 filings
Open-market sales, last 90 days
$0
in 0 filings

Shares bought or sold at a price by officers, directors and 10% owners (Form 4 codes P and S). Grants, option exercises and tax withholding aren't counted.

Reading 100 more Form 4s from the SEC; this list fills in as they're read.

Date Insider Transaction Shares Price Value Owned after
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −2,910 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −2,050 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −795 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −795 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −1,900 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −2,125 0
2026-03-16 Ritrievi Kimberly E Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −1,718 0
2026-02-19 Obiaya Christiana Director Option exercise +495 9,666
2026-02-19 Obiaya Christiana Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −495 0
2026-02-19 Argus Roger R President and CEO Grant or award · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) +28,174 28,174
2026-02-10 Volpi Kirsten M Director Option exercise +1,000 $9.59 $10K 70,218
2026-02-10 Volpi Kirsten M Director Option exercise · STOCK OPTION (RIGHT TO BUY) −1,000 8,000
2026-02-06 BURDICK STEVEN M EVP, CFO Gift −11,100 138,251
2026-02-04 CARTER BRIAN N SVP, Corporate Controller Sale −9,979 $40.23 $401K 46,496
2026-01-26 Hardwick M Susan Director Grant or award · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) +1,754 1,754
2026-01-26 Feeler Jeffrey R Director Grant or award · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) +1,754 1,754
2026-01-12 Birkenbeuel Gary Director Option exercise +1,590 46,635
2026-01-12 Birkenbeuel Gary Director Grant or award +4,397 51,032
2026-01-12 Birkenbeuel Gary Director Option exercise · RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) −1,590 0
2026-01-12 Ritrievi Kimberly E Director Grant or award +2,208 145,408

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