LGN vs TTEK

For growth investors, Legence Corp.

Class A Common stock (LGN) is the stronger pick with 29. 9% revenue growth year-over-year, versus 4. 7% for Tetra Tech, Inc. (TTEK). Tetra Tech, Inc. (TTEK) offers the better valuation at 33. 3x trailing P/E (20. 3x forward), making it the more compelling value choice. Analysts rate Legence Corp. Class A Common stock (LGN) a "Buy" — based on 9 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. 3x versus Legence Corp. Class A Common stock at 1070. 8x. On forward P/E, Tetra Tech, Inc. is actually cheaper at 20. 3x.

Over the past 5 years, Legence Corp.

Class A Common stock (LGN) delivered a total return of +235. 3%, compared to +28. 7% for Tetra Tech, Inc. (TTEK). Over 10 years, the gap is even starker: TTEK returned +451. 8% versus LGN's +235. 3%. 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 Legence Corp. Class A Common stock's 2. 49β — meaning LGN is approximately 366% more volatile than TTEK relative to the S&P 500.

By revenue growth (latest reported year), Legence Corp.

Class A Common stock (LGN) is pulling ahead at 29. 9% versus 4. 7% for Tetra Tech, Inc. (TTEK). On earnings-per-share growth, the picture is similar: Legence Corp. Class A Common stock grew EPS 121. 2% year-over-year, compared to -24. 4% for Tetra Tech, Inc.. 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.

Tetra Tech, Inc.

(TTEK) is the more profitable company, earning 4. 6% net margin versus 0. 5% for Legence Corp. Class A Common stock — meaning it keeps 4. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TTEK leads at 11. 1% versus 2. 8% for LGN. At the gross margin level — before operating expenses — LGN leads at 20. 4%, 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.

On forward earnings alone, Tetra Tech, Inc.

(TTEK) trades at 20. 3x forward P/E versus 102. 6x for Legence Corp. Class A Common stock — 82. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TTEK: 33. 8% to $41. 50.

All stocks in this comparison pay dividends.

Legence Corp. Class A Common stock (LGN) offers the highest yield at 2. 9%, versus 0. 8% for Tetra Tech, Inc. (TTEK).

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, +451. 8% 10Y return). Legence Corp. Class A Common stock (LGN) carries a higher beta of 2. 49 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (TTEK: +451. 8%, LGN: +235. 3%), 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: LGN is a small-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.