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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13D 0001361570 XXXXXXXX LIVE COMMON STOCK 04/15/2025 true 0000844965 88162G103 TETRA TECHNOLOGIES INC 24955 INTERSTATE 45 NORTH THE WOODLANDS TX 77380 Mathieu Cornu 0041583234506 Route des Acacias 60 Geneva V8 1211 0001361570 N PICTET ASSET MANAGEMENT SA WC N V8 14458349.00 0.00 14458349.00 0.00 14458349.00 N 5.3 IA COMMON STOCK TETRA TECHNOLOGIES INC 24955 INTERSTATE 45 NORTH THE WOODLANDS TX 77380 Pictet Asset Management SA 60 ROUTE DES ACACIAS GENEVA 73 211 SWITZERLAND Investment Adviser No No GENEVA (SWITZERLAND) The Reporting Person acquired the shares of common stock of Tetra Tech Inc. on behalf of its institutional clients who are managed on a discretionary basis. The purchase cost is approximately USD 412,134,333. The source of the funds comes from our institutional clients' assets The funds used for the acquisition did not involve any financing or borrowing. The Reporting Person acquired shares of Tetra Tech Inc. as part of its investment strategy, considering the clarity and robustness of the issuer's long-term strategy; the functioning and calibre of governance structures and effective leadership; the financial strength and performance of issuers and the fair valuation of underlying securities; and financially-material sustainability risks & opportunities. The Reporting Person is therefore actively engaging with the Issuer to discuss and promote initiatives that align with these business practices. This engagement is part of the Reporting Person's broader strategy to support companies in enhancing their approach, thereby potentially improving long-term shareholder value. As such, the Reporting Person may seek to influence the Issuer's policies and practices through discussions with the Boards and management of the companies in which we invest. The Reporting Person does not currently have any plans or proposals that would result in a change in control of the Issuer, nor does it intend to acquire additional shares for the purpose of gaining control. However, the Reporting Person reserves the right to change its intentions and take any actions that it deems appropriate in light of its ongoing engagement and evaluation of the Issuer's policies and practices. Pictet Asset management SA holds 14,458,349 shares of Tetra Tech Inc., which represents 5.3% of the total number of shares. Pictet Asset Management SA has the Sole power to vote on 13,288,970 out of the 14,458,349 shares under management. In the past sixty days, the following transactions have been done : Date Type Quantity Price Exchange 04.11.25 BUY 732 29.44 The NASDAQ Stock Exchange 04.11.25 BUY 879 29.59 The NASDAQ Stock Exchange 04.11.25 BUY 8'356 29.45 The NASDAQ Stock Exchange 04.11.25 SELLL 1'493 29.45 The NASDAQ Stock Exchange 04.11.25 BUY 1'869 29.59 The NASDAQ Stock Exchange 04.07.25 SELLL 34'002 27.92 The NASDAQ Stock Exchange 04.02.25 SELLL 3'791 29.24 The NASDAQ Stock Exchange 03.31.25 SELLL 422 28.76 The NASDAQ Stock Exchange 03.31.25 SELLL 14'240 29.25 The NASDAQ Stock Exchange 03.31.25 SELLL 25'157 28.76 The NASDAQ Stock Exchange 03.28.25 BUY 16'813 29.50 The NASDAQ Stock Exchange 03.27.25 BUY 110 29.62 The NASDAQ Stock Exchange 03.27.25 BUY 819 29.49 The NASDAQ Stock Exchange 03.25.25 BUY 1'080 29.50 The NASDAQ Stock Exchange 03.24.25 BUY 1'804 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 901 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 4'496 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 4'512 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 15'342 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 4'508 29.32 The NASDAQ Stock Exchange 03.24.25 BUY 1'807 29.32 The NASDAQ Stock Exchange 03.21.25 BUY 25'909 28.99 The NASDAQ Stock Exchange 03.20.25 BUY 186 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 1'448 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 847 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 3'517 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 3'627 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 9'827 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 3'022 29.75 The NASDAQ Stock Exchange 03.20.25 BUY 1'534 29.75 The NASDAQ Stock Exchange 03.20.25 SELLL 36'536 29.42 The NASDAQ Stock Exchange 03.20.25 BUY 95'992 29.75 The NASDAQ Stock Exchange 03.19.25 BUY 334 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 334 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 334 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 452 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 886 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 436 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 339 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 364 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 334 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 841 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 2'332 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 1'134 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 1'207 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 791 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 2'469 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 3'372 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 1'800 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 6'933 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 694 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 2'032 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 996 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 468 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 945 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 465 29.97 The NASDAQ Stock Exchange 03.19.25 BUY 18'212 30.24 The NASDAQ Stock Exchange 03.19.25 BUY 67'006 30.35 The NASDAQ Stock Exchange 03.19.25 BUY 32'338 29.97 The NASDAQ Stock Exchange 03.18.25 SELLL 1'621 29.42 The NASDAQ Stock Exchange 03.18.25 SELLL 82'473 29.30 The NASDAQ Stock Exchange 03.17.25 SELLL 100'380 29.51 The NASDAQ Stock Exchange 03.11.25 BUY 44'643 29.66 The NASDAQ Stock Exchange 03.10.25 SELLL 808 30.35 The NASDAQ Stock Exchange 03.07.25 SELLL 41'709 29.29 The NASDAQ Stock Exchange 03.04.25 BUY 1'510 28.40 The NASDAQ Stock Exchange 03.03.25 SELLL 581 28.26 The NASDAQ Stock Exchange 02.26.25 SELLL 120 29.64 The NASDAQ Stock Exchange 02.26.25 BUY 826 30.07 The NASDAQ Stock Exchange 02.24.25 BUY 784 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 1'657 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 828 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 2'889 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 3'319 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 8'298 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 2'487 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 1'666 30.24 The NASDAQ Stock Exchange 02.24.25 BUY 6'240 30.00 The NASDAQ Stock Exchange 02.21.25 SELLL 1'876 29.97 The NASDAQ Stock Exchange 02.20.25 BUY 737 30.40 The NASDAQ Stock Exchange 02.18.25 BUY 39'433 31.08 The NASDAQ Stock Exchange 02.18.25 BUY 59 30.72 The NASDAQ Stock Exchange 02.18.25 BUY 597 30.72 The NASDAQ Stock Exchange 02.14.25 BUY 55'718 30.77 The NASDAQ Stock Exchange 02.14.25 BUY 569 30.75 The NASDAQ Stock Exchange The securities reported herein come from the assets of our institutional clients who are managed by the Reporting Person on a discretionary basis. Consequently, our clients have the right to receive dividends and any proceeds from the sale of the Issuer's securities, in proportion to their respective managed assets. The Reporting Person itself does not have any direct economic interest in the dividends or sale proceeds from the securities of Tetra Tech Inc., other than its entitlement to management fees and / or performance-based compensation, as agreed upon with its clients. The Reporting Person's role is limited to managing the investments in accordance with the investment objectives and strategies set forth by each of its institutional clients. Not Applicable The Reporting Person's exposure to Tetra Tech Inc. is solely through direct stock investments held by its managed institutional clients. There are no contracts, arrangements, understandings, or relationships with any third parties regarding the securities of Tetra Tech Inc., other than those arising from the ordinary course of discretionary management of our client assets. The Reporting Person does not have any derivative positions, options, or other financial instruments related to the securities of the Issuer. Furthermore, there are no agreements or understandings that would influence the voting or disposition of these securities beyond the Reporting Person's discretionary investment authority as an asset manager. PICTET ASSET MANAGEMENT SA Karine Valtanen Karine Valtanen Global Head of Compliance 04/15/2025