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TETRA TECH INC

For the period ended Jun 28, 2026. Filed Jul 31, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 28, 2026 · Filed Jul 31, 2026

TTEK$40.29-0.7%Stored close · as of Nov 6, 2026
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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended June 28, 2026

OR

☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 0-19655

(Exact name of registrant as specified in its charter)

Delaware95-4148514
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification Number)

3475 East Foothill Boulevard, Pasadena, California 91107

(Address of principal executive offices) (Zip Code)

(626)351-4664

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading Symbol(s)Name of each exchange on which registered
Common Stock, $0.01 par valueTTEKThe NASDAQ Stock Market LLC

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Yes ☒ No☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).

Yes ☒ No☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer☒Accelerated filer☐Non-accelerated filer☐Smaller reporting company☐
Emerging growth company☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Yes☐ No ☒

At July 20, 2026,256,044,428 shares of the registrant’s common stock were outstanding.

INDEX

PART I.FINANCIAL INFORMATIONPAGE NO.
Item 1.Financial Statements (Unaudited)3
Consolidated Balance Sheets as of June 28, 2026 and September 28, 20253
Consolidated Statements of Income for the Three and Nine Months Ended June 28, 2026 and June 29, 20254
Consolidated Statements of Comprehensive Income (Loss) for the Three and Nine Months Ended June 28, 2026 and June 29, 20255
Consolidated Statements of Cash Flows for the Nine Months Ended June 28, 2026 and June 29, 20256
Consolidated Statements of Stockholders' Equity for the Three and Nine Months Ended June 28, 2026 and June 29, 20257
Notes to Unaudited Consolidated Financial Statements9
Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations27
Item 3.Quantitative and Qualitative Disclosures About Market Risk39
Item 4.Controls and Procedures39
PART II.OTHER INFORMATION40
Item 1.Legal Proceedings40
Item 1A.Risk Factors41
Item 2.Unregistered Sales of Equity Securities and Use of Proceeds41
Item 4.Mine Safety Disclosures41
Item 5.Other Information41
Item 6.Exhibits41
SIGNATURES43
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