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Tetra Tech Inc

TTEK
Exchange
Nasdaq
Industry
Services-Engineering Services
SEC CIK
0000831641

No open-market purchases or sales by Tetra Tech Inc insiders were filed in the last 90 days; 555 institutions reported holding it in 13F filings for Q2 2026, worth $7.32B in total; no superinvestor holds it.

SEC filings

10-K, 10-Q, 8-K, 20-F and 40-F reports Tetra Tech Inc filed with the SEC, newest first.

Livermore lists each filing's form, 8-K items and dates only. To read a filing, open it on SEC.gov; an 8-K's press release or other attachments, such as exhibit 99.1 for Item 2.02, are in the filing index.

SEC filings by Tetra Tech Inc
FiledForm8-K itemsPeriodDocumentFiling index
Sep 10, 20268-K8.019.01Sep 10, 2026SECIndex
Jul 31, 202610-Q–Jun 28, 2026SECIndex
Jul 29, 20268-K2.028.019.01Jul 29, 2026SECIndex
May 1, 202610-Q–Mar 29, 2026SECIndex
Apr 29, 20268-K2.028.019.01Apr 29, 2026SECIndex
Mar 26, 20268-K5.028.019.01Mar 26, 2026SECIndex
Feb 20, 20268-K5.025.079.01Feb 19, 2026SECIndex
Jan 30, 202610-Q–Dec 28, 2025SECIndex
Jan 28, 20268-K2.028.019.01Jan 28, 2026SECIndex
Jan 6, 20268-K5.028.019.01Jan 6, 2026SECIndex
Dec 22, 20258-K5.028.019.01Dec 22, 2025SECIndex
Nov 20, 202510-K–Sep 28, 2025SECIndex
Nov 12, 20258-K2.028.019.01Nov 12, 2025SECIndex
Oct 7, 20258-K5.028.019.01Oct 7, 2025SECIndex
Aug 1, 202510-Q–Jun 29, 2025SECIndex
Jul 30, 20258-K2.028.019.01Jul 30, 2025SECIndex
May 8, 202510-Q–Mar 30, 2025SECIndex
May 7, 20258-K1.012.022.033.038.019.01May 5, 2025SECIndex
Feb 28, 20258-K5.025.07Feb 24, 2025SECIndex
Jan 31, 202510-Q–Dec 29, 2024SECIndex
Jan 30, 20258-K2.028.019.01Jan 29, 2025SECIndex
Jan 17, 20258-K8.019.01Jan 17, 2025SECIndex
Nov 19, 202410-K–Sep 29, 2024SECIndex
Nov 13, 20248-K2.028.019.01Nov 13, 2024SECIndex
Sep 6, 20248-K5.039.01Sep 6, 2024SECIndex
Aug 2, 20248-K5.028.019.01Jul 29, 2024SECIndex
Aug 2, 202410-Q–Jun 30, 2024SECIndex
Jul 31, 20248-K2.028.019.01Jul 31, 2024SECIndex
May 24, 20248-K5.02May 21, 2024SECIndex
May 3, 202410-Q–Mar 31, 2024SECIndex
May 1, 20248-K2.028.019.01May 1, 2024SECIndex
Mar 1, 20248-K5.07Feb 29, 2024SECIndex
Feb 2, 202410-Q–Dec 31, 2023SECIndex
Jan 31, 20248-K2.028.019.01Jan 31, 2024SECIndex
Nov 22, 202310-K–Oct 1, 2023SECIndex
Nov 15, 20238-K/A5.07Feb 28, 2023SECIndex
Nov 15, 20238-K2.028.019.01Nov 15, 2023SECIndex
Aug 22, 20238-K1.012.033.028.019.01Aug 17, 2023SECIndex
Aug 15, 202310-K/A–Oct 2, 2022SECIndex
Aug 10, 202310-Q–Jul 2, 2023SECIndex
Aug 9, 20238-K2.028.019.01Aug 9, 2023SECIndex
May 11, 202310-Q–Apr 2, 2023SECIndex
May 10, 20238-K2.028.019.01May 10, 2023SECIndex
May 8, 20238-K5.02May 2, 2023SECIndex
Apr 10, 20238-K/A2.019.01Jan 19, 2023SECIndex
Mar 3, 20238-K5.07Feb 28, 2023SECIndex
Feb 3, 202310-Q–Jan 1, 2023SECIndex
Feb 1, 20238-K2.028.019.01Feb 1, 2023SECIndex
Jan 24, 20238-K2.017.019.01Jan 19, 2023SECIndex
Dec 12, 20228-K7.019.01Dec 12, 2022SECIndex