Gary Birkenbeuel Tetra Tech Inc (TTEK) insider trading activity

Gary Birkenbeuel is Director of TETRA TECH INC. Currently has a direct ownership of 51,032 shares of TTEK, which is worth approximately $1.85 Million. The most recent transaction as insider was on Jan 12, 2026, when has been sold 4,397 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 51K

35.27% 3M change

13.29% 12M change

Total Value Held $1.85 Million

Gary Birkenbeuel Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jan 12 2026	BUY Grant, award, or other acquisition	-	4,397 Added 7.93%	51,032 Common Stock
Jan 12 2026	BUY Exercise of conversion of derivative security	-	1,590 Added 3.3%	46,635 Common Stock
Aug 14 2025	SELL Open market or private sale	$86,040 $36.0 p/Share	2,390 Reduced 5.96%	37,725 Common Stock
Jan 01 2025	BUY Exercise of conversion of derivative security	-	2,050 Added 4.35%	45,045 Common Stock
Jan 01 2025	BUY Grant, award, or other acquisition	-	5,270 Added 10.92%	42,995 Common Stock
Aug 20 2024	BUY Exercise of conversion of derivative security	$29,111 $59.9 p/Share	486 Added 5.71%	8,023 Common Stock
Nov 18 2022	BUY Grant, award, or other acquisition	-	1,710 Added 18.49%	7,537 Common Stock

Nov 23 2021	BUY Grant, award, or other acquisition	-	2,310 Added 28.39%	5,827 Common Stock
Nov 18 2020	BUY Grant, award, or other acquisition	-	1,236 Added 26.0%	3,517 Common Stock
Nov 18 2020	BUY Exercise of conversion of derivative security	-	582 Added 20.33%	2,281 Common Stock

Gary Birkenbeuel

Director

Pasadena, CA

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