0002100119-26-001120.txt : 20260430 0002100119-26-001120.hdr.sgml : 20260430 20260430140124 ACCESSION NUMBER: 0002100119-26-001120 CONFORMED SUBMISSION TYPE: SCHEDULE 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20260430 DATE AS OF CHANGE: 20260430 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: TETRA TECH INC CENTRAL INDEX KEY: 0000831641 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-ENGINEERING SERVICES [8711] ORGANIZATION NAME: 07 Trade & Services EIN: 954148514 STATE OF INCORPORATION: DE FISCAL YEAR END: 0927 FILING VALUES: FORM TYPE: SCHEDULE 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-43035 FILM NUMBER: 26923071 BUSINESS ADDRESS: STREET 1: 3475 EAST FOOTHILL BOULEVARD CITY: PASADENA STATE: CA ZIP: 91107 BUSINESS PHONE: 6263514664 MAIL ADDRESS: STREET 1: 3475 EAST FOOTHILL BOULEVARD CITY: PASADENA STATE: CA ZIP: 91107 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: VANGUARD CAPITAL MANAGEMENT LLC CENTRAL INDEX KEY: 0002100119 ORGANIZATION NAME: EIN: 392877419 STATE OF INCORPORATION: PA FISCAL YEAR END: 1231 LEGAL ENTITY IDENTIFIER: 529900ZEWTRLEJ6XE960 FILING VALUES: FORM TYPE: SCHEDULE 13G BUSINESS ADDRESS: STREET 1: 100 VANGUARD BLVD CITY: MALVERN STATE: PA ZIP: 19355 BUSINESS PHONE: 610-669-6148 MAIL ADDRESS: STREET 1: 100 VANGUARD BLVD CITY: MALVERN STATE: PA ZIP: 19355 SCHEDULE 13G 1 primary_doc.xml X0202 SCHEDULE 13G 0002100119 XXXXXXXX LIVE Common Stock 03/31/2026 0000831641 Tetra Tech Inc 88162G103 3475 East Foothill Blvd Pasadena CA 91107 Rule 13d-1(b) Vanguard Capital Management PA 1947705 0 13656856 0 13656856 5.23 IA In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Capital Management LLC and the following affiliates of Vanguard Capital Management LLC or business divisions of such affiliates: Vanguard Asset Management Limited, Vanguard Fiduciary Trust Company, Vanguard Global Advisers, LLC and Vanguard Investments Australia Ltd. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Capital Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Capital Management LLC, or business divisions of such subsidiaries, whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release. Tetra Tech Inc 3475 East Foothill Blvd, Pasadena, CA, 91107 Vanguard Capital Management 100 Vanguard Blvd,, Malvern, PA, 19355 PA N IA 13656856 5.23 1947705 0 13656856 0 Y N Vanguard Capital Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Vanguard Capital Management Ashley Grim 04/30/2026