TTEK · Nasdaq · CIK 0000831641

TETRA TECH INC

TETRA TECH INC’s most recent SEC filing in our snapshot is a Form 8-K filed on Sep 10, 2026. In fiscal 2025 (year ended Sep 28, 2025) it reported revenue of $5.4B and net income of $247.9M, according to its XBRL data on EDGAR. Its EDGAR record lists 33 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2025
$5.4B
Net income, FY2025
$247.9M
Form 4 filings on record, past 12 months
33

Company overview

Legal name (as filed)
TETRA TECH INC
Ticker
TTEK
SEC Central Index Key (CIK)
0000831641
Industry (SIC)
Services-Engineering Services (code 8711)
Business address
PASADENA, CA
State or country of incorporation
DE
Fiscal year ends
September 27
SEC filer category
Large accelerated filer
Position in SEC ticker list
#945 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from TETRA TECH INC’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in U.S. dollars; the fiscal year is named for the calendar year in which it ends.

Revenue
$3.2BFY2021$3.5BFY2022$4.5BFY2023$5.2BFY2024$5.4BFY2025
Net income
$232.8MFY2021$263.2MFY2022$273.5MFY2023$333.4MFY2024$247.9MFY2025
TTEK annual results
ItemFY2021
ended Oct 3, 2021		FY2022
ended Oct 2, 2022		FY2023
ended Oct 1, 2023		FY2024
ended Sep 29, 2024		FY2025
ended Sep 28, 2025
Revenue$3.2B$3.5B$4.5B$5.2B$5.4B
Net income$232.8M$263.2M$273.5M$333.4M$247.9M
Diluted EPS$4.26$0.97$1.02$1.23$0.93
Total assets$2.6B$2.6B$3.8B$4.2B$4.3B
Cash and equivalents$166.6M$185.1M$168.8M$232.7M$167.5M

XBRL tags used: revenue = RevenueFromContractWithCustomerExcludingAssessedTax; netIncome = ProfitLoss; assets = Assets; eps = EarningsPerShareDiluted; cash = CashAndCashEquivalentsAtCarryingValue. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

TTEK latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Nov 20, 202510-KAnnual report· period Sep 28, 2025Document · Index
Jul 31, 202610-QQuarterly report· period Jun 28, 2026Document · Index
Sep 10, 20268-KOther events· period Sep 10, 2026Document · Index
Jan 9, 2026DEF 14ADefinitive proxy statement· period Feb 19, 2026Document · Index

Recent SEC filings

The 40 newest documents filed by or about TETRA TECH INC, by form type:

4 ×198-K ×83 ×310-Q ×3144 ×1S-8 ×1SCHEDULE 13G ×1SCHEDULE 13G/A ×1ARS ×1DEFA14A ×1DEF 14A ×1
TTEK recent filings
FiledFormWhat it isOriginal
Sep 10, 20268-KOther events· period Sep 10, 2026Document · Index
Aug 6, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 4, 2026Document · Index
Aug 5, 2026S-8Registration of employee benefit plan securitiesDocument · Index
Jul 31, 202610-QQuarterly report· period Jun 28, 2026Document · Index
Jul 29, 20268-KResults of operations; Other events· period Jul 29, 2026Document · Index
Jun 5, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 4, 2026Document · Index
May 15, 20264Statement of changes in beneficial ownership (insider trade)· period May 15, 2026Document · Index
May 1, 202610-QQuarterly report· period Mar 29, 2026Document · Index
Apr 30, 2026SCHEDULE 13GPassive beneficial ownership report (over 5%)Document · Index
Apr 29, 20268-KResults of operations; Other events· period Apr 29, 2026Document · Index
Apr 28, 20264Statement of changes in beneficial ownership (insider trade)· period Apr 27, 2026Document · Index
Apr 3, 20263Initial statement of beneficial ownership· period Mar 30, 2026Document · Index
Mar 27, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Mar 26, 20268-KDirector or officer change; Other events· period Mar 26, 2026Document · Index
Mar 18, 20264Statement of changes in beneficial ownership (insider trade)· period Mar 16, 2026Document · Index
Feb 20, 20264Statement of changes in beneficial ownership (insider trade)· period Feb 19, 2026Document · Index
Feb 20, 20264Statement of changes in beneficial ownership (insider trade)· period Feb 19, 2026Document · Index
Feb 20, 20268-KDirector or officer change; Shareholder vote results· period Feb 19, 2026Document · Index
Feb 12, 20264Statement of changes in beneficial ownership (insider trade)· period Feb 10, 2026Document · Index
Feb 6, 20264Statement of changes in beneficial ownership (insider trade)· period Feb 6, 2026Document · Index
Feb 6, 20264Statement of changes in beneficial ownership (insider trade)· period Feb 4, 2026Document · Index
Feb 4, 2026144Notice of proposed sale of securitiesDocument · Index
Jan 30, 202610-QQuarterly report· period Dec 28, 2025Document · Index
Jan 28, 20264Statement of changes in beneficial ownership (insider trade)· period Jan 26, 2026Document · Index
Jan 28, 20264Statement of changes in beneficial ownership (insider trade)· period Jan 26, 2026Document · Index
Jan 28, 20268-KResults of operations; Other events· period Jan 28, 2026Document · Index
Jan 14, 20264Statement of changes in beneficial ownership (insider trade)· period Jan 1, 2025Document · Index
Jan 14, 20264Statement of changes in beneficial ownership (insider trade)· period Jan 12, 2026Document · Index
Jan 9, 2026ARSARS· period Sep 28, 2025Document · Index
Jan 9, 2026DEFA14AAdditional proxy soliciting materialsDocument · Index
Jan 9, 2026DEF 14ADefinitive proxy statement· period Feb 19, 2026Document · Index
Jan 8, 20263Initial statement of beneficial ownership· period Dec 29, 2025Document · Index
Jan 6, 20263Initial statement of beneficial ownership· period Dec 29, 2025Document · Index
Jan 6, 20268-KDirector or officer change; Other events· period Jan 6, 2026Document · Index
Dec 22, 20258-KDirector or officer change; Other events· period Dec 22, 2025Document · Index
Dec 3, 20254Statement of changes in beneficial ownership (insider trade)· period Nov 19, 2025Document · Index
Dec 2, 20254Statement of changes in beneficial ownership (insider trade)· period Nov 19, 2025Document · Index
Dec 2, 20254Statement of changes in beneficial ownership (insider trade)· period Nov 19, 2025Document · Index
Dec 2, 20254Statement of changes in beneficial ownership (insider trade)· period Nov 19, 2025Document · Index
Dec 2, 20254Statement of changes in beneficial ownership (insider trade)· period Nov 19, 2025Document · Index

Insider filing activity

33 Form 4 filings appear in TETRA TECH INC’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

Other companies in Services-Engineering Services

All 6 companies in Services-Engineering Services· Companies headquartered in California

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0000831641 and XBRL company facts. TETRA TECH INC on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.