Tetra Tech Inc
NASDAQ: TTEK · INDUSTRIALS · ENGINEERING & CONSTRUCTION
Updated 2026-09-11
Tetra Tech Inc (TTEK) Stock Valuation Analysis
Fair value estimate, historical valuation range, and quality signals for TTEK.
Current price exceeds what fundamentals support. Risk/reward skewed unfavorably.
TTEK historical valuation range
Where current P/E sits in TTEK's own 5Y range.
TTEK intrinsic value (DCF)
DCF-based fair value estimate vs current market price.
Intrinsic value calculated using discounted cash flow (DCF) model based on projected free cash flows, discount rate, and terminal growth assumptions. A positive margin of safety indicates the current price is below estimated fair value, providing a cushion against estimation error.
TTEK valuation signals
Quick-read green flags, caution flags, and risks based on current metrics.
P/E Ratio — History
Current: 21.63x
P/S Ratio — History
Current: 2.11x
Is TTEK overvalued in 2026?
Tetra Tech Inc (TTEK) currently trades at $36.49 per share with a market capitalization of $9,194,555,000.00. Based on our multi-factor framework, the stock appears richly valued with a Smart Value Score of 46/100. This score blends growth quality, financial health, and price attractiveness into a single institutional-grade read.
The stock trades at a P/E ratio of 21.6x, below its 5-year median of 25.0x. The PEG ratio of 2.10 indicates the price has run ahead of the underlying growth rate.
Looking at its own history, TTEK is currently trading cheaper than 71% of the last 5Y on P/E. This places it in the 29th percentile of its historical range, a reasonable but unremarkable position.
Our discounted cash flow model estimates TTEK's intrinsic value at $41.61 per share, against the current market price of $36.49. This implies a margin of safety of +2.86%. The stock is priced close to its estimated fair value, offering limited upside without further operational improvement.
The Piotroski F-Score of 5/9 puts financial quality in a middling range, neither a standout strength nor an obvious red flag.
Bottom line: TTEK appears richly valued on our framework, with a Smart Value Score of 46/100. At current levels the risk/reward is skewed against the buyer. A materially lower price or significant operational improvement would be needed to change the picture.
Frequently asked questions
Is TTEK overvalued?
TTEK scores 46/100 on our Smart Value Score (Grade C), a weak overall profile. The DCF also shows a positive margin of safety, so price and fundamentals line up reasonably well.
What is TTEK's fair value?
Our DCF model estimates TTEK's intrinsic value at $41.61 per share, versus the current price of $36.49, a margin of safety of +2.86%. Fair value is the present value of the cash flows we project the business to produce, so a price below it means the market is pricing the stock below that conservative estimate.
What P/E ratio does TTEK trade at?
TTEK trades at a P/E of 21.6x on trailing twelve-month earnings, against a 5-year median of 25.0x. P/E is what you pay per dollar of profit, and sitting below its own median means the stock is cheaper than usual relative to its earnings.
Is TTEK a buy based on valuation?
Our Smart Value rating for TTEK is Sell, from a Smart Value Score of 46/100 that blends growth, quality, and valuation. The profile skews cautious, and a better price or clearer operating improvement would strengthen the case. This is research to inform your decision, not personalized financial advice.
How does TTEK's valuation compare to its history?
On P/E, TTEK sits in the 29th percentile of its own 5Y range, below its long-run median relative to where it has traded. A low percentile means today's multiple is near the bottom of its historical band.
What is TTEK's Smart Value Score?
TTEK's Smart Value Score is 46/100. It is a proprietary WallStSmart metric blending growth quality, financial health, and valuation into a single 0-100 read, and scores above 75 are rare, signaling strong multi-factor alignment.