<div id="readability-page-1"><div>Carter Brian N Vice President of Tetra Tech Inc/CA [TTEK] filed a Form 4 on December 2, 2025 with the Securities and Exchange Commission disclosing the following changes in ownership:<div><table><tbody><tr><th>Date</th><th>Transaction</th><th>Shares</th><th>Price</th><th>Value</th></tr><tr><td>11/18/25-11/30/25</td><td>Exercise</td><td>15,962</td><td>$0.00</td><td>N/A</td></tr><tr><td>11/18/25-11/30/25</td><td>Surrender(1)</td><td>8,711</td><td>$35.53</td><td>$309,470</td></tr></tbody></table></div>Ending Holdings: 56,475 - Direct<ul><li>(1)</li><li>Surrender of shares back to company to pay option exercise cost and/or resulting tax liability.</li></ul>For a free trial, or to learn more about our insider trading analysis and data services, please visit http://www.washingtonservice.com or contact us at (301) 913-5100 or send an email to info@washingtonservice.com.Founded in 1970, The Washington Service provides securities professionals with financial, economic and public policy research and data. </div></div>

TTEK

Carter Brian N, Vice President of Tetra Tech Inc/CA, filed a Form 4 with the SEC on December 2, 2025, disclosing changes in ownership. He exercised 15,962 shares and surrendered 8,711 shares at $35.53 each to cover option exercise costs and tax liabilities. His ending holdings are 56,475 shares. The Washington Service provides insider trading analysis and data services.

VP Carter Acquires 7,251 Of Tetra Tech Inc/CA [TTEK]