16 unchanged sentences
Pricewaterhouse Coopers LLP, the independent registered public accounting firm that audited the consolidated financial statements included in this Form 10-K, has issued a report on our internal control over financial reporting.
−Removed: This report, dated November 19, 2024, appears on pages 51-52 of this F orm 10-K.
−Removed: Consistent with the guidance issued by the Securities and Exchange Commission Staff, management's assessment of internal control over financial reporting excluded LS Technologies ("LST"), which we acquired on January 31, 2024.
−Removed: LST is a wholly owned subsidiary whose total assets and total revenues represent 1.4% and 1.7%, respectively, of the related consolidated financial statement amounts as of and for the fiscal year ended September 29, 2024.
+Added: This report, dated November 20, 2025, appears o n pages 46-47 of this F orm 10-K.
+Added: Consistent with the guidance issued by the Securities and Exchange Commission Staff, management's assessment of internal control over financial reporting excluded SAGE Group Holdings ("SAGE"), which we acquired on June 27, 2025.
+Added: SAGE is a wholly owned subsidiary whose total assets and total revenues represent 1.2% and 0.8%, respectively, of the related consolidated financial statement amounts as of and for the fiscal year ended September 28, 2025.
Changes in Internal Control over Financial Reporting
6 unchanged sentences
1 – Election of Directors"
−Removed: and "Section 16(a) Beneficial Ownership Reporting Compliance" in our Proxy Statement related to th e 2025 An nual Meeting of Stockholders and is incorporated by reference.
+Added: and "Section 16(a) Beneficial Ownership Reporting Compliance" in our Proxy Statement related t o the 2026 Ann ual Meeting of Stockholders and is incorporated by reference.
Pursuant to General Instruction G (3) of Form 10-K, the information required by this item relating to our executive officers is included under the caption "Executive Officers of the Registrant" in Part I of this Report.
7 unchanged sentences
Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters
−Removed: The information required by this item relating to security ownership of certain beneficial owners and management, and securities authorized for issuance under equity compensation plans, is included under the caption "Security Ownership of Management and Significant Stockholders" in our Proxy Statement related to t he 2025 Ann ual Meeting of Stockholders and is incorporated by reference.
+Added: The information required by this item relating to security ownership of certain beneficial owners and management, and securities authorized for issuance under equity compensation plans, is included under the caption "Security Ownership of Management and Significant Stockholders" in our Proxy Statement related to t he 2026 Annual Meeting of Stockholders and is incorporated by reference.
Certain Relationships and Related Transactions, and Director Independence
The information required by this item relating to review, approval or ratification of transactions with related persons is included under the caption "Related Person Transactions," and the information required by this item relating to director independence is included under the caption "Item No.
−Removed: 1 – Election of Directors," in each case in our Proxy Statement related to t he 2025 A nnual Meeting of Stockholders and is incorporated by reference.
+Added: 1 – Election of Directors," in each case in our Proxy Statement related to t he 2026 Annual M eeting of Stockholders and is incorporated by reference.
Principal Accounting Fees and Services
The information required by this item is included under the caption "Item No.
−Removed: 4 – Ratification of Independent Registered Public Accounting Firm" in our Proxy Statement related to the 2025 Annua l Meeting of Stockholders and is incorporated by reference.
+Added: 4 – Ratification of Independent Registered Public Accounting Firm" in our Proxy Statement related to th e 2026 Annua l Meeting of Stockholders and is incorporated by reference.
Exhibits, Financial Statement Schedules
1 unchanged sentence
1 Consolidated financial statements
−Removed: Consolidated Balance Sheets at Se ptember 29 , 202 4 and October 1 , 202 3
−Removed: Consolidated Statements of Income for the fiscal years ended September 29 , 202 4 , October 1 , 202 3 and October 2 , 202 2
−Removed: Consolidated Statements of Comprehensive Income for the fiscal years ended September 29 , 202 4 , October 1 , 202 3 and October 2 , 202 2
−Removed: Consolidated Statements of Cash Flows for the fiscal years ended September 29 , 202 4 , October 1 , 202 3 and October 2 , 202 2
−Removed: Consolidated Statements of Equity for the fiscal years ended September 29 , 202 4 , October 1 , 202 3 and October 2 , 20 2 2
+Added: Consolidated Balance Sheets at September 2 8 , 202 5 and September 29 , 202 4
+Added: Consolidated Statements of Income for the fiscal years ended September 28, 2025, September 29, 2024 and October 1, 2023
+Added: Consolidated Statements of Comprehensive Income for the fiscal years ended September 28, 2025, September 29, 2024, and October 1, 2023
+Added: Consolidated Statements of Cash Flows for the fiscal years ended September 28, 2025, September 29, 2024 and October 1, 2023
+Added: Consolidated Statements of Equity for the fiscal years ended September 28, 2025, September 29, 2024 and October 1, 2023
Notes to Consolidated Financial Statements
1 unchanged sentence
2 Consolidated financial statement Schedule
−Removed: Schedule II – Valuation and Qualifying Accounts and Reserves for the fiscal years ended September 29 , 202 4 , October 1 , 202 3 and October 2 , 202 2
+Added: Schedule II – Valuation and Qualifying Accounts and Reserves for the fiscal years ended September 28, 2025, September 29, 2024 and October 1, 2023
All other schedules are omitted because they are neither applicable nor required
3 unchanged sentences
For the Fiscal Years Ended
−Removed: October 2, 2022, October 1, 2023 and September 29, 2024
+Added: October 1, 2023, September 29, 2024 and September 28, 2025
(in thousands)
22 unchanged sentences
Description of Capital Stock.+
−Removed: Third Amended and Restated Credit Agreement dated as of October 26, 2022 among Tetra Tech, Inc., Tetra Tech Canada Holding Corporation, Tetra Tech UK Holdings Limited, Tetra Tech Coffey Pty., Ltd., the subsidiary guarantors and the lenders party thereto and Bank of America, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated October 28, 2022).
−Removed: Amendment No.
−Removed: 1 to Third Amended and Restated Credit Agreement dated as of August 4, 2023 among Tetra Tech, Inc., Tetra Tech Canada Holding Corporation, Tetra Tech UK Holdings Limited, Tetra Tech Coffey Pty Ltd, the subsidiary guarantors and the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K dated August 22, 2023).
−Removed: Amendment No.
−Removed: 2 to Third Amended and Restated Credit Agreement dated as of August 17, 2023 among Tetra Tech, Inc., Tetra Tech Canada Holding Corporation, Tetra Tech UK Holdings Limited, Tetra Tech Coffey Pty Ltd, the subsidiary guarantors and the lenders party thereto and Bank of America, N.A., as administrative agent (incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K dated August 22, 2023).
+Added: Fourth Amended and Restated Credit Agreement dated as of May 5, 2025 among Tetra Tech, Inc., Tetra Tech Canada Holding Corporation, Tetra Tech UK Holdings Limited, Tetra Tech Coffey Pty., Ltd., the subsidiary guarantors and the lenders party thereto and Bank of America, N.A., as Administrative Agent (incorporated by reference to Exhibit 10.1 to the Company's Current Report on Form 8-K dated May 7, 2025).
Form of Confirmation for Capped Call Transactions (incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K dated August 22, 2023).
45 unchanged sentences
BIRKENBEUEL Director November 20, 2025
−Removed: DOUGLAS Director November 19, 2024
/s/ PRASHANT GANDHI Director November 20, 2025
7 unchanged sentences
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.