| 2025-11-12 | +18.5% | earnings | Seeking Alpha | Tetra Tech Non-GAAP EPS of $0.44 beats by $0.04, revenue of $1.07B beats by $10M |
| 2025-11-12 | +18.5% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2024-11-13 | -14.5% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2025-05-08 | +14.2% | earnings | Seeking Alpha | Tetra Tech outlines $1.1B-$1.2B Q3 revenue guidance amid growing demand for water and digital systems |
| 2025-05-08 | +14.2% | earnings | Seeking Alpha | Tetra Tech, Inc. (TTEK) Q2 2025 Earnings Call Transcript |
| 2025-11-13 | +13.3% | earnings | Seeking Alpha | Tetra Tech, Inc. (TTEK) Q4 2025 Earnings Call Transcript |
| 2025-11-13 | +13.3% | earnings | Yahoo Finance | Tetra Tech Inc (TTEK) Q4 2025 Earnings Call Highlights: Record Revenue and Strategic Growth ... - Yahoo Finance |
| 2025-05-07 | +13.0% | legal | SEC EDGAR | TTEK 8-K: 1.01, 2.02, 2.03, 3.03, 8.01 (SEC Filing) |
| 2022-11-09 | +10.2% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2024-07-31 | +9.7% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-02-03 | +9.5% | news | Stock Titan | Major UK water utility taps Tetra Tech's WaterNet to cut leaks - Stock Titan |
| 2026-02-20 | -9.4% | legal | SEC EDGAR | TTEK 8-K: 5.02, 5.07 (SEC Filing) |
| 2026-02-26 | +8.3% | news | Finviz | Here's Why Tetra (TTEK) Is a Great 'Buy the Bottom' Stock Now - Finviz |
| 2026-02-25 | +7.7% | news | Yahoo Finance | Willdan vs. Tetra Tech: Which Infrastructure Stock Has More Upside? - Yahoo Finance |
| 2026-02-12 | -7.7% | news | Stock Titan | Tetra Tech tapped to help US Army fortify dams, levees and flood defenses - Stock Titan |
| 2026-01-08 | +6.9% | earnings | Seeking Alpha | Tetra Tech wins Missile Defense Agency SHIELD IDIQ, shares rise |
| 2025-11-20 | -6.0% | legal | TradingView | TETRA TECH INC SEC 10-K Report - TradingView |
| 2025-11-20 | -6.0% | news | GuruFocus | Decoding Tetra Tech Inc (TTEK): A Strategic SWOT Insight - GuruFocus |
| 2025-11-20 | -6.0% | news | Stock Titan | American Rare Earths (AMRRY) engages Tetra Tech to pursue U.S. funding for Halleck Creek project - Stock Titan |
| 2022-02-02 | +5.3% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2025-12-05 | -4.9% | news | Yahoo Finance | Tetra Tech, Inc. (TTEK): A Bull Case Theory - Yahoo Finance |
| 2025-02-28 | -4.7% | legal | SEC EDGAR | TTEK 8-K: 5.02 and 5.07 (SEC Filing) |
| 2025-02-28 | -4.7% | news | Yahoo Finance | Here's Why Investors Should Avoid Tetra Tech Stock Right Now - Yahoo Finance |
| 2021-04-28 | -4.4% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2021-04-28 | -4.4% | analyst | eToro | TTEK Stock Price | Analyst Target 41.67 & Consensus - eToro |
| 2024-05-01 | +4.3% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2025-04-10 | +3.7% | news | Yahoo Finance | Here's Why You Should Avoid Investing in Tetra Tech Stock Now - Yahoo Finance |
| 2025-11-14 | -3.6% | earnings | Seeking Alpha | Tetra Tech, Inc. 2025 Q4 - Results - Earnings Call Presentation |
| 2022-08-03 | -3.6% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-01-06 | -3.6% | executive | Seeking Alpha | Tetra Tech to appoint Roger Argus as CEO |
| 2026-01-06 | -3.6% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2024-08-08 | -3.5% | executive | Yahoo Finance | Insider Sale: Chairman and CEO Dan Batrack Sells 17,924 Shares of Tetra Tech Inc (TTEK) - Yahoo Finance |
| 2026-04-08 | -3.3% | earnings | Stock Titan | Tetra Tech schedules April 30 call after Q2 2026 results on April 29 - Stock Titan |
| 2026-01-02 | +3.3% | news | simplywall.st | These 4 Measures Indicate That Tetra Tech (NASDAQ:TTEK) Is Using Debt Safely - simplywall.st |
| 2021-11-17 | +3.2% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2022-05-04 | -2.7% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-03-12 | -2.7% | expansion | Seeking Alpha | Tetra Tech wins $99M NAVFAC southeast engineering services contract |
| 2026-03-12 | -2.7% | M&A | Stock Titan | Navy awards $99M deal to Tetra Tech JV to modernize bases - Stock Titan |
| 2025-10-07 | +2.6% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2026-01-28 | +2.6% | earnings | Seeking Alpha | Tetra Tech Non-GAAP EPS of $0.35 beats by $0.04, revenue of $1.04B beats by $65.72M |
| 2026-01-28 | +2.6% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-01-28 | +2.6% | earnings | ChartMill | Tetra Tech Inc (NASDAQ:TTEK) Beats Q1 Estimates and Raises Fiscal 2026 Guidance - ChartMill |
| 2026-01-28 | +2.6% | expansion | marketscreener.com | Westinghouse Electric Company and Tetra Tech Canada Sign Agreement for Nuclear New-Build Projects - marketscreener.com |
| 2025-11-22 | -2.5% | news | simplywall.st | Tetra Tech (NASDAQ:TTEK) Is Paying Out A Dividend Of $0.065 - simplywall.st |
| 2021-10-07 | +2.5% | legal | SEC EDGAR | TTEK 8-K: 8.01 and (SEC Filing) |
| 2026-01-14 | +2.4% | news | Stock Traders Daily | Precision Trading with Tetra Tech Inc. (TTEK) Risk Zones - Stock Traders Daily |
| 2024-09-12 | -2.3% | news | GuruFocus | Director Kimberly Ritrievi Sells 6,500 Shares of Tetra Tech Inc (TTEK) - GuruFocus |
| 2026-03-26 | -2.3% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2026-03-26 | -2.3% | expansion | Yahoo Finance | Tetra Tech (TTEK) Valuation Check After New Port Of Los Angeles Infrastructure Contract - Yahoo Finance |
| 2026-03-26 | -2.3% | news | Stock Titan | [8-K] TETRA TECH INC Reports Material Event - Stock Titan |
| 2022-10-28 | +2.3% | legal | SEC EDGAR | TTEK 8-K: 1.01, 1.02, 3.03, 8.01 (SEC Filing) |
| 2022-02-22 | +2.3% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2022-02-22 | +2.3% | legal | SEC EDGAR | TTEK 8-K: 1.01, 3.03, 8.01 (SEC Filing) |
| 2025-01-30 | -2.3% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-02-19 | -2.2% | expansion | Seeking Alpha | Tetra Tech awarded $100 million environmental services contract for Air Force projects |
| 2026-01-29 | +2.0% | earnings | Seeking Alpha | Tetra Tech, Inc. (TTEK) Q1 2026 Earnings Call Transcript |
| 2026-01-29 | +2.0% | earnings | Seeking Alpha | Tetra Tech, Inc. 2026 Q1 - Results - Earnings Call Presentation |
| 2026-01-29 | +2.0% | earnings | Seeking Alpha | Tetra Tech raises quarterly dividend 12% to $0.065 per share |
| 2025-01-17 | -2.0% | legal | SEC EDGAR | TTEK 8-K: 8.01 and (SEC Filing) |
| 2024-05-24 | -1.9% | legal | SEC EDGAR | TTEK 8-K: 5.02 (SEC Filing) |
| 2024-05-24 | -1.9% | executive | marketscreener.com | Tetra Tech, Inc. Announces Resignation of Jill Hudkins as President, Effective from May 31, 2024 - marketscreener.com |
| 2026-04-12 | +1.8% | earnings | MarketBeat | Tudor Investment Corp ET AL Acquires 55,001 Shares of Tetra Tech, Inc. $TTEK - MarketBeat |
| 2026-04-11 | +1.8% | legal | Stock Titan | TTEK SEC Filings - Tetra Tech 10-K, 10-Q, 8-K Forms - Stock Titan |
| 2026-02-27 | +1.8% | news | Yahoo Finance | Here's Why You Should Consider Investing in Tetra Tech Stock Now - Yahoo Finance |
| 2023-05-10 | +1.8% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-01-23 | -1.8% | news | AD HOC NEWS | The Truth About Tetra Tech Inc: Quiet Stock, Loud Potential – Is TTEK Your Next Power Play? - AD HOC NEWS |
| 2026-04-22 | -1.8% | news | StockStory | 3 Reasons TTEK Has Explosive Upside Potential |
| 2026-04-22 | -1.8% | earnings | MarketBeat | Penobscot Investment Management Company Inc. Sells 46,350 Shares of Tetra Tech, Inc. $TTEK - MarketBeat |
| 2026-04-22 | -1.8% | earnings | MarketBeat | Tetra Tech (TTEK) Expected to Announce Quarterly Earnings on Wednesday - MarketBeat |
| 2024-08-02 | +1.7% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2024-09-06 | -1.7% | news | Moomoo | Tetra Tech Inc To Carry Out 5-for-1 Stock Split On September 9th, 2024 - Moomoo |
| 2025-07-30 | -1.6% | earnings | Seeking Alpha | Tetra Tech Non-GAAP EPS of $0.43 beats by $0.05, revenue of $1.15B in-line |
| 2025-07-30 | -1.6% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-04-16 | -1.6% | news | Zacks | What Makes Tetra (TTEK) a New Buy Stock |
| 2024-09-23 | +1.6% | news | intelligentinvestor.com.au | Tetra Tech Inc (NASDAQ: TTEK) - Share Price - intelligentinvestor.com.au |
| 2026-01-10 | -1.5% | expansion | Yahoo Finance | Why Tetra Tech (TTEK) Is Up 8.0% After Massive US$151 Billion SHIELD Contract Win And What's Next - Yahoo Finance |
| 2022-08-02 | -1.4% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2025-03-01 | -1.4% | news | Yahoo Finance | Is Tetra Tech, Inc. (TTEK) the Best Water Stock to Buy According to Hedge Funds? - Yahoo Finance |
| 2023-02-01 | -1.4% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2025-07-31 | -1.4% | earnings | Seeking Alpha | Tetra Tech outlines $500M digital automation revenue target by 2030 as federal contracts drive record Q3 results |
| 2025-07-31 | -1.4% | earnings | Seeking Alpha | Tetra Tech, Inc. (TTEK) Q3 2025 Earnings Call Transcript |
| 2025-07-31 | -1.4% | earnings | Seeking Alpha | Tetra Tech, Inc. 2025 Q3 - Results - Earnings Call Presentation |
| 2025-07-31 | -1.4% | news | Seeking Alpha | Tetra Tech declares $0.065 dividend |
| 2023-11-15 | +1.4% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2022-10-11 | +1.3% | legal | SEC EDGAR | TTEK 8-K: 1.01, 3.03, 8.01 (SEC Filing) |
| 2023-04-10 | +1.3% | legal | SEC EDGAR | TTEK 8-K: 2.01 and (SEC Filing) |
| 2021-07-26 | -1.3% | earnings | Zacks Investment Research | What date does Tetra Tech's (TTEK) report Earnings - Earnings Calendar & Announcement - Zacks Investment Research |
| 2021-07-28 | +1.3% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2025-12-22 | -1.2% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2025-12-22 | -1.2% | executive | Stock Titan | Ex-American Water CEO joins firm shaping global water and energy projects - Stock Titan |
| 2025-10-30 | +1.2% | expansion | Seeking Alpha | Tetra Tech awarded 17 million water engineering design contract |
| 2026-04-21 | -1.2% | news | StockStory | 1 of Wall Street’s Favorite Stock Worth Your Attention and 2 We Find Risky |
| 2026-04-21 | -1.2% | expansion | MT Newswires | Tetra Tech Wins Northern Ireland Water Contract |
| 2026-04-21 | -1.2% | expansion | Business Wire | Tetra Tech Awarded £18 Million Water and Wastewater Contract in Northern Ireland |
| 2026-04-21 | -1.2% | expansion | Seeking Alpha | Tetra Tech awarded 18M water and wastewater contract in Northern Ireland |
| 2026-04-21 | -1.2% | expansion | GuruFocus | Tetra Tech (TTEK) Wins Contract for Water Quality Services in No - GuruFocus |
| 2026-04-21 | -1.2% | news | Stock Titan | Northern Ireland taps Tetra Tech to help protect water quality - Stock Titan |
| 2025-06-16 | -1.1% | analyst | Seeking Alpha | Tetra Tech: Continued Re-Rating Likely |
| 2026-04-23 | -1.1% | news | MT Newswires | Tetra Tech Selected for Netherlands Wastewater Treatment Project |
| 2026-04-23 | -1.1% | news | Business Wire | Tetra Tech Selected for Netherlands Wastewater Treatment and Water Infrastructure Framework |
| 2026-04-23 | -1.1% | news | Motley Fool | Absolute Advisers Adds BlackRock's HYT ETF to Its Alternative Investment Approach |
| 2026-04-23 | -1.1% | news | Stock Titan | Tetra Tech joins Dutch water framework serving 780,000 people - Stock Titan |
| 2025-09-25 | -1.0% | news | Yahoo Finance | Here's Why Tetra Tech (TTEK) is a Strong Growth Stock - Yahoo Finance |
| 2026-03-24 | +1.0% | news | Stock Titan | Western Hemisphere's busiest port selects Tetra Tech for cleanup - Stock Titan |
| 2025-06-09 | -1.0% | news | Seeking Alpha | Tetra Tech: A Quiet Leader In Infrastructure And Sustainability |
| 2025-06-09 | -1.0% | news | Seeking Alpha | Tetra Tech: A Quiet Leader In Infrastructure And Sustainability (NASDAQ:TTEK) - Seeking Alpha |
| 2026-02-06 | +1.0% | news | GuruFocus | Insider Sell Alert: Brian Carter Sells Shares of Tetra Tech Inc (TTEK) - GuruFocus |
| 2026-04-02 | +0.9% | news | Yahoo Finance | Here’s Why TimesSquare Capital U.S. Small Cap Growth Strategy Sold Tetra Tech (TTEK) - Yahoo Finance |
| 2024-03-05 | +0.9% | news | CNN | symbol__ Stock Quote Price and Forecast - CNN |
| 2026-03-17 | -0.9% | expansion | Seeking Alpha | Tetra Tech awarded $14 million DLA technology task order contract |
| 2026-03-17 | -0.9% | M&A | Stock Titan | Tetra Tech tapped to modernize global defense supply chain tech in $14M deal - Stock Titan |
| 2025-11-11 | +0.9% | earnings | Seeking Alpha | Tetra Tech Q4 2025 Earnings Preview |
| 2022-09-26 | -0.9% | legal | SEC EDGAR | TTEK 8-K: 1.01, 2.03, 8.01 (SEC Filing) |
| 2025-12-30 | -0.8% | news | Seeking Alpha | Tetra Tech: Temporary Headwind, Good Medium To Long Term Prospects |
| 2025-12-30 | -0.8% | news | Yahoo Finance | Do Options Traders Know Something About Tetra Tech Stock We Don't? - Yahoo Finance |
| 2025-12-30 | -0.8% | news | Seeking Alpha | Tetra Tech: Temporary Headwind, Good Medium To Long Term Prospects - Seeking Alpha |
| 2025-10-23 | +0.8% | news | GuruFocus | PICTET ASSET MANAGEMENT SA Reduces Stake in Tetra Tech Inc - GuruFocus |
| 2022-09-13 | +0.8% | analyst | TradingView | TTEK Forecast — Price Target — Prediction for 2027 - TradingView |
| 2026-01-27 | +0.8% | earnings | Seeking Alpha | Tetra Tech Q1 2026 Earnings Preview |
| 2026-02-05 | +0.8% | news | Investing.com India | Tetra Tech stock hits 52-week high at 40.91 USD By Investing.com - Investing.com India |
| 2022-11-15 | -0.7% | legal | SEC EDGAR | TTEK 8-K: 5.02, 8.01 (SEC Filing) |
| 2025-07-29 | -0.7% | earnings | Seeking Alpha | Tetra Tech Q3 2025 Earnings Preview |
| 2025-07-29 | -0.7% | expansion | Seeking Alpha | Tetra Tech selected as lead designer for $990M Pacific Engineering Design contract |
| 2026-04-17 | -0.7% | earnings | StockStory | 1 Profitable Stock to Own for Decades and 2 We Brush Off |
| 2025-09-09 | -0.7% | news | simplywall.st | What Does Tetra Tech, Inc.'s (NASDAQ:TTEK) Share Price Indicate? - simplywall.st |
| 2023-05-08 | +0.6% | legal | SEC EDGAR | TTEK 8-K: 5.02 (SEC Filing) |
| 2023-08-22 | -0.6% | legal | SEC EDGAR | TTEK 8-K: 1.01, 2.03, 3.02, 8.01 (SEC Filing) |
| 2026-02-13 | -0.6% | news | Finviz | Why Tetra Tech (TTEK) Stock Is Trading Up Today - Finviz |
| 2026-04-19 | +0.6% | earnings | MarketBeat | Tetra Tech, Inc. (NASDAQ:TTEK) Receives Consensus Recommendation of "Moderate Buy" from Analysts - MarketBeat |
| 2026-04-19 | +0.6% | earnings | MarketBeat | Tetra Tech, Inc. $TTEK Holdings Trimmed by Lbp Am Sa - MarketBeat |
| 2026-04-18 | +0.6% | earnings | MarketBeat | Ninety One UK Ltd Sells 67,253 Shares of Tetra Tech, Inc. $TTEK - MarketBeat |
| 2024-01-31 | +0.5% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-03-31 | -0.4% | earnings | MarketBeat | SG Americas Securities LLC Purchases 169,434 Shares of Tetra Tech, Inc. $TTEK - MarketBeat |
| 2025-12-09 | +0.4% | expansion | Seeking Alpha | Tetra Tech awarded $500M USACE contract |
| 2025-08-01 | -0.4% | earnings | Yahoo Finance | Tetra Tech Inc (TTEK) Q3 2025 Earnings Call Highlights: Record Operating Income and EPS Amid ... - Yahoo Finance |
| 2025-03-29 | -0.3% | news | Yahoo Finance | Why Tetra Tech Inc (TTEK) Is Plunging in 2025? - Yahoo Finance |
| 2025-03-15 | +0.3% | news | Seeking Alpha | Tetra Tech Stock: Bought Its Way To The Top, Can It Keep Doing This? (NASDAQ:TTEK) - Seeking Alpha |
| 2026-04-10 | -0.3% | news | Cổng thông tin điện tử tỉnh Lào Cai | What metrics matter for Tetra Tech (TTEK) Stock valuation | Price at $30.24, Down 1.98% - High Interest Stocks - Cổng thông tin điện tử tỉnh Lào Cai |
| 2023-08-09 | -0.2% | legal | SEC EDGAR | TTEK 8-K: 2.02, 8.01 (SEC Filing) |
| 2026-01-22 | +0.2% | legal | Stock Titan | 600-person federal IT and cybersecurity firm Halvik bought by Tetra Tech - Stock Titan |
| 2025-07-15 | -0.2% | expansion | Seeking Alpha | Tetra Tech secures $94 million emergency preparedness and response services contract |
| 2025-11-19 | -0.1% | news | Intellectia AI | Top 5 Best Stocks Under $50 With Massive Potential for 2026 - Intellectia AI |
| 2023-01-24 | -0.1% | legal | SEC EDGAR | TTEK 8-K: 2.01, 7.01 (SEC Filing) |
| 2026-03-27 | -0.1% | news | Stock Titan | Vanguard Amends 13G/A for Tetra Tech (NASDAQ: TTEK) — Reports Zero Holdings - Stock Titan |
| 2026-04-03 | -0.1% | news | Stock Titan | New Tetra Tech (TTEK) director files initial Form 3 ownership report - Stock Titan |
| 2026-04-03 | -0.1% | earnings | MarketBeat | Wealth Enhancement Advisory Services LLC Increases Stake in Tetra Tech, Inc. $TTEK - MarketBeat |
| 2026-02-17 | +0.0% | news | Stock Titan | Dutch agency taps Tetra Tech to help fortify flood defenses and bridges - Stock Titan |
| 2026-04-26 | — | earnings | MarketBeat | Cwm LLC Has $1.70 Million Stock Holdings in Tetra Tech, Inc. $TTEK - MarketBeat |
| 2026-04-25 | — | news | Simply Wall St. | How Tetra Tech (TTEK) Narrative Is Shifting On Refined Assumptions And Slightly Lower Valuation |
| 2026-04-25 | — | earnings | MarketBeat | 3,208,190 Shares in Tetra Tech, Inc. $TTEK Acquired by Impax Asset Management Group plc - MarketBeat |
| 2026-04-24 | — | earnings | MarketBeat | Copeland Capital Management LLC Has $55.78 Million Stock Holdings in Tetra Tech, Inc. $TTEK - MarketBeat |
| 2026-04-24 | — | earnings | MarketBeat | Asset Management One Co. Ltd. Cuts Stock Holdings in Tetra Tech, Inc. $TTEK - MarketBeat |