STN vs TTEK

For growth investors, Stantec Inc.

(STN) is the stronger pick with 15. 7% revenue growth year-over-year, versus 4. 7% for Tetra Tech, Inc. (TTEK). Tetra Tech, Inc. (TTEK) offers the better valuation at 33. 0x trailing P/E (20. 0x forward), making it the more compelling value choice. Analysts rate Stantec Inc. (STN) a "Hold" — based on 18 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Tetra Tech, Inc.

(TTEK) is the cheapest at 33. 0x versus Stantec Inc. at 39. 2x. On forward P/E, Tetra Tech, Inc. is actually cheaper at 20. 0x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Stantec Inc. wins at 1. 59x versus Tetra Tech, Inc. 's 2. 47x — a reasonable growth-adjusted valuation.

Over the past 5 years, Stantec Inc.

(STN) delivered a total return of +113. 8%, compared to +28. 0% for Tetra Tech, Inc. (TTEK). Over 10 years, the gap is even starker: TTEK returned +450. 1% versus STN's +283. 5%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Tetra Tech, Inc.

(TTEK) is the lower-risk stock at 0. 53β versus Stantec Inc. 's 1. 04β — meaning STN is approximately 95% more volatile than TTEK relative to the S&P 500. On balance sheet safety, Tetra Tech, Inc. (TTEK) carries a lower debt/equity ratio of 55% versus 69% for Stantec Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Stantec Inc.

(STN) is pulling ahead at 15. 7% versus 4. 7% for Tetra Tech, Inc. (TTEK). On earnings-per-share growth, the picture is similar: Stantec Inc. grew EPS 6. 4% year-over-year, compared to -24. 4% for Tetra Tech, Inc.. Over a 3-year CAGR, TTEK leads at 24. 3% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Stantec Inc.

(STN) is the more profitable company, earning 4. 8% net margin versus 4. 6% for Tetra Tech, Inc. — meaning it keeps 4. 8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TTEK leads at 11. 1% versus 7. 9% for STN. At the gross margin level — before operating expenses — STN leads at 42. 6%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Stantec Inc. (STN) is the more undervalued stock at a PEG of 1. 59x versus Tetra Tech, Inc. 's 2. 47x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, Tetra Tech, Inc. (TTEK) trades at 20. 0x forward P/E versus 20. 2x for Stantec Inc. — 0. 2x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TTEK: 35. 2% to $41. 50.

All stocks in this comparison pay dividends.

Tetra Tech, Inc. (TTEK) offers the highest yield at 0. 8%, versus 0. 7% for Stantec Inc. (STN).

For long-horizon retirement investors, Tetra Tech, Inc.

(TTEK) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 53), 0. 8% yield, +450. 1% 10Y return). Both have compounded well over 10 years (TTEK: +450. 1%, STN: +283. 5%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: STN is a mid-cap high-growth stock; TTEK is a small-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.