Gary Birkenbeuel serves as Executive at TETRA TECH INC, where they oversee executive responsibilities. Since joining the company, Gary Birkenbeuel has executed 17 insider transactions totaling $86.0K, demonstrating a bearish approach to their equity position. Their most recent transaction on Jan 12, 2026 involved exercising options for 1,590 shares valued at $0.
Gary Birkenbeuel currently holds 51,032 shares of TETRA TECH INC (TTEK), valued at approximately $0. This represents their equity stake as Executive.
Based on SEC Form 4 filings, Gary Birkenbeuel has been a net seller of TTEK stock. They have purchased $0 and sold $86.0K worth of shares.
Gary Birkenbeuel's most recent insider trade was on Jan 12, 2026, when they sold 1,590 shares at $0.00 per share.
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| $N/A |
| Discretionary |
| Jan 12, 2026 | TTEK | $0 | Option Exercise | 1,590 | $N/A | Discretionary |
| Aug 14, 2025 | TTEK | $86.0K | Sale | 2,390 | $36.00 | Discretionary |
| Jan 1, 2025 | TTEK | $0 | Option Exercise | 2,050 | $N/A | Discretionary |
| Jan 1, 2025 | TTEK | $0 | Option Exercise | 2,050 | $N/A | Discretionary |
| Jan 1, 2025 | TTEK | $0 | Award | 5,270 | $N/A | Discretionary |
| Aug 20, 2024 | TTEK | $14.6K | Option Exercise | 243 | $59.90 | Discretionary |
| Aug 20, 2024 | TTEK | $14.6K | Option Exercise | 243 | $59.90 | Discretionary |
| Nov 18, 2022 | TTEK | $0 | Award | 1,710 | $N/A | Discretionary |
| Nov 23, 2021 | TTEK | $0 | Award | 2,310 | $N/A | Discretionary |
| Nov 18, 2020 | TTEK | $0 | Award | 1,236 | $N/A | Discretionary |
| Nov 18, 2020 | TTEK | $0 | Option Exercise | 582 | $N/A | Discretionary |
| Aug 4, 2020 | TTEK | $7.2K | Option Exercise | 120 | $59.90 | Discretionary |
| Mar 3, 2020 | TTEK | $29.9K | Option Exercise | 500 | $59.90 | Discretionary |
| Nov 18, 2019 | TTEK | $0 | Option Exercise | 770 | $N/A | Discretionary |
| Jul 30, 2019 | TTEK | $0 | Option Exercise | 309 | $N/A | Discretionary |