Tetra Tech, Inc. (TTEK) P/E Ratio History
Fairly ValuedTrading at 29.4x, near 5Y avg of 33.4x · 35th percentile · In line with own history · Data 1992–2026
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P/E Ratio Analysis
As of June 21, 2026, Tetra Tech, Inc. (TTEK) trades at a price-to-earnings ratio of 29.4x, with a stock price of $27.36 and trailing twelve-month earnings per share of $1.68.
The current P/E is 12% below its 5-year average of 33.4x. Over the past five years, TTEK's P/E has ranged from a low of 17.8x to a high of 44.4x, placing the current valuation at the 35th percentile of its historical range.
Compared to the Industrials sector median P/E of 25.6x, TTEK trades at a 15% premium to its sector peers. The sector includes 403 companies with P/E ratios ranging from 0.1x to 198.8x.
The PEG ratio of 3.63 (P/E divided by -24% EPS growth) suggests the stock may be expensive relative to its earnings growth. Peter Lynch popularized the rule that a PEG below 1.0 indicates an attractive entry point.
Relative to the broader market, TTEK commands a significant premium over the S&P 500 median P/E of 24.4x. Investors should consider the company's growth prospects, competitive position, and earnings quality when evaluating whether the current valuation is justified.
For a comprehensive intrinsic value estimate using discounted cash flow analysis, see our TTEK DCF Valuation Calculator →
Note: P/E ratio is just one valuation metric. It does not account for balance sheet strength, cash flow quality, or growth sustainability. Always conduct comprehensive due diligence before making investment decisions.
TTEK Cross-Benchmark Valuation
How does the current P/E compare to sector peers and the broader market?
TTEK P/E vs Peers
Engineering and environmental consulting peers sorted by market cap
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $9B | 16.3Lowest | - | +43% | |
| $3B | 27.5 | 4.61 | -2% | |
| $5B | 20.2 | 1.10Best | +52% | |
| $1B | 25.5 | - | +121% | |
| $105B | 103.3 | 5.99 | +13% | |
| $30B | 74.9 | 25.22 | +146% | |
| $26B | 91.9 | 2.07 | +13% | |
| $6B | 40.4 | - | +39% | |
| $7B | 61.2 | 3.67 | +311%Best | |
| $24B | 21.9 | 2.78 | +6% |
Lower P/E can signal a discount or weaker growth expectations; PEG adds growth context.
TTEK Historical P/E Data (1992–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Period End | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | Mar 29 2026 | $29.78 | $1.67 | 17.8x | -45% |
| FY2026 Q1 | Dec 28 2025 | $34.03 | $1.33 | 25.6x | -21% |
| FY2025 Q4 | Sep 28 2025 | $33.33 | $0.93 | 35.7x | +10% |
| FY2025 Q3 | Jun 29 2025 | $35.64 | $0.80 | 44.4x | +37% |
| FY2025 Q2 | Mar 30 2025 | $29.15 | $0.69 | 42.1x | +30% |
| FY2025 Q1 | Dec 29 2024 | $39.83 | $0.95 | 41.8x | +29% |
| FY2024 Q4 | Sep 30 2024 | $47.16 | $1.23 | 38.3x | +18% |
| FY2024 Q3 | Jun 30 2024 | $40.90 | $1.08 | 37.9x | +17% |
| FY2024 Q2 | Mar 31 2024 | $36.94 | $0.98 | 37.7x | +16% |
| FY2024 Q1 | Dec 31 2023 | $33.39 | $0.86 | 38.8x | +20% |
| FY2023 Q4 | Sep 30 2023 | $30.41 | $1.02 | 29.8x | -8% |
| FY2023 Q3 | Jul 02 2023 | $32.75 | $1.13 | 29.0x | -11% |
| FY2023 Q2 | Apr 02 2023 | $29.38 | $1.13 | 26.0x | -20% |
| FY2023 Q1 | Jan 01 2023 | $29.04 | $1.17 | 24.8x | -24% |
| FY2022 Q4 | Sep 30 2022 | $25.71 | $0.98 | 26.2x | -19% |
| FY2022 Q3 | Jul 03 2022 | $27.76 | $0.97 | 28.6x | -12% |
| FY2022 Q2 | Apr 03 2022 | $33.44 | $0.94 | 35.6x | +10% |
| FY2022 Q1 | Jan 02 2022 | $33.96 | $0.91 | 37.3x | +15% |
| FY2021 Q4 | - | $29.87 | $0.85 | 35.1x | +8% |
| FY2021 Q3 | Jun 27 2021 | $24.61 | $0.71 | 34.7x | +7% |
| FY2021 Q2 | Mar 28 2021 | $26.68 | $0.69 | 38.7x | +19% |
| FY2021 Q1 | Dec 27 2020 | $23.08 | $0.65 | 35.5x | +9% |
| FY2020 Q4 | Sep 30 2020 | $19.10 | $0.63 | 30.3x | -7% |
| FY2020 Q3 | Jun 28 2020 | $14.90 | $0.51 | 29.1x | -10% |
| FY2020 Q2 | Mar 29 2020 | $13.84 | $0.52 | 26.5x | -18% |
| FY2020 Q1 | Dec 29 2019 | $17.28 | $0.59 | 29.2x | -10% |
| FY2019 Q4 | Sep 30 2019 | $17.35 | $0.57 | 30.3x | -7% |
| FY2019 Q3 | Jun 30 2019 | $15.71 | $0.63 | 24.9x | -23% |
| FY2019 Q2 | Mar 31 2019 | $11.92 | $0.57 | 20.9x | -36% |
| FY2019 Q1 | Dec 30 2018 | $10.25 | $0.47 | 21.8x | -33% |
| FY2018 Q4 | Sep 30 2018 | $13.66 | $0.48 | 28.5x | -12% |
| FY2018 Q3 | Jul 01 2018 | $11.70 | $0.50 | 23.4x | -28% |
| FY2018 Q2 | Apr 01 2018 | $9.79 | $0.48 | 20.4x | -37% |
| FY2018 Q1 | Dec 31 2017 | $9.63 | $0.47 | 20.4x | -37% |
| FY2017 Q4 | Sep 30 2017 | $9.31 | $0.40 | 23.0x | -29% |
| FY2017 Q3 | Jul 02 2017 | $9.15 | $0.39 | 23.2x | -28% |
| FY2017 Q2 | Apr 02 2017 | $8.17 | $0.38 | 21.4x | -34% |
| FY2017 Q1 | Jan 01 2017 | $8.63 | $0.30 | 28.6x | -12% |
| FY2016 Q4 | Sep 30 2016 | $7.09 | $0.29 | 24.6x | -24% |
| FY2016 Q3 | Jun 26 2016 | $6.06 | $0.07 | 89.1x | +174% |
| FY2016 Q2 | Mar 27 2016 | $5.76 | $0.07 | 87.3x | +169% |
| FY2016 Q1 | Dec 27 2015 | $5.29 | $0.12 | 45.6x | +40% |
| FY2015 Q4 | Sep 30 2015 | $4.86 | $0.12 | 40.5x | +25% |
| FY2015 Q3 | Jun 28 2015 | $5.21 | $0.30 | 17.4x | -47% |
| FY2015 Q2 | Mar 29 2015 | $4.81 | $0.30 | 16.3x | -50% |
| FY2015 Q1 | Dec 28 2014 | $5.38 | $0.33 | 16.3x | -50% |
| FY2014 Q4 | - | $5.00 | $0.33 | 15.1x | -54% |
| FY2014 Q3 | Jun 29 2014 | $5.45 | $0.34 | 16.0x | -51% |
| FY2014 Q2 | Mar 30 2014 | $5.84 | $0.02 | 324.4x | +899% |
| FY2013 Q3 | Jun 30 2013 | $4.70 | $0.01 | 391.7x | +1106% |
| FY2013 Q2 | Mar 31 2013 | $6.10 | $0.34 | 17.8x | -45% |
| FY2013 Q1 | Dec 30 2012 | $5.23 | $0.34 | 15.6x | -52% |
| FY2012 Q4 | Sep 30 2012 | $5.25 | $0.33 | 16.1x | -50% |
| FY2012 Q3 | Jul 01 2012 | $5.22 | $0.32 | 16.5x | -49% |
| FY2012 Q2 | Apr 01 2012 | $5.27 | $0.30 | 17.5x | -46% |
| FY2012 Q1 | Jan 01 2012 | $4.32 | $0.29 | 15.0x | -54% |
| FY2011 Q4 | Sep 30 2011 | $3.75 | $0.29 | 13.0x | -60% |
| FY2011 Q3 | Jul 03 2011 | $4.59 | $0.28 | 16.5x | -49% |
| FY2011 Q2 | Apr 03 2011 | $4.97 | $0.27 | 18.5x | -43% |
| FY2011 Q1 | Jan 02 2011 | $5.01 | $0.26 | 19.4x | -40% |
| FY2010 Q4 | - | $4.19 | $0.25 | 17.0x | -48% |
| FY2010 Q3 | Jun 27 2010 | $4.20 | $0.24 | 17.6x | -46% |
| FY2010 Q2 | Mar 28 2010 | $4.59 | $0.27 | 16.9x | -48% |
| FY2010 Q1 | Dec 27 2009 | $5.49 | $0.29 | 18.9x | -42% |
| FY2009 Q4 | Sep 30 2009 | $5.31 | $0.28 | 18.7x | -42% |
| FY2009 Q3 | Jun 28 2009 | $5.95 | $0.28 | 21.4x | -34% |
| FY2009 Q2 | Mar 29 2009 | $4.15 | $0.23 | 17.9x | -45% |
| FY2009 Q1 | Dec 28 2008 | $4.48 | $0.21 | 20.9x | -36% |
| FY2008 Q4 | - | $4.81 | $0.20 | 23.6x | -27% |
| FY2008 Q3 | Jun 29 2008 | $4.49 | $0.19 | 23.4x | -28% |
| FY2008 Q2 | Mar 30 2008 | $3.97 | $0.18 | 22.1x | -32% |
| FY2008 Q1 | Dec 30 2007 | $4.38 | $0.17 | 25.8x | -21% |
| FY2007 Q4 | Sep 30 2007 | $4.22 | $0.16 | 26.7x | -18% |
| FY2007 Q3 | Jul 01 2007 | $4.31 | $0.15 | 28.7x | -12% |
| FY2007 Q2 | Apr 01 2007 | $3.81 | $0.14 | 28.0x | -14% |
| FY2007 Q1 | Dec 31 2006 | $3.62 | $0.13 | 27.4x | -16% |
| FY2006 Q4 | Sep 30 2006 | $3.48 | $0.13 | 27.2x | -16% |
| FY2006 Q3 | Jul 02 2006 | $3.55 | $0.12 | 29.6x | -9% |
| FY2006 Q2 | Apr 02 2006 | $3.82 | $0.12 | 32.4x | -0% |
| FY2005 Q1 | Jan 02 2005 | $3.35 | $0.07 | 50.4x | +55% |
| FY2004 Q4 | - | $2.53 | $0.08 | 29.9x | -8% |
| FY2004 Q3 | Jun 27 2004 | $3.15 | $0.18 | 17.9x | -45% |
| FY2004 Q2 | Mar 28 2004 | $4.20 | $0.19 | 21.6x | -33% |
| FY2004 Q1 | Dec 28 2003 | $4.92 | $0.19 | 26.0x | -20% |
| FY2003 Q4 | - | $4.00 | $0.18 | 22.6x | -30% |
| FY2003 Q3 | Jun 29 2003 | $3.45 | $0.15 | 22.8x | -30% |
| FY2003 Q2 | Mar 30 2003 | $2.92 | $0.13 | 22.3x | -31% |
| FY2003 Q1 | Dec 29 2002 | $2.46 | $0.11 | 22.4x | -31% |
| FY2002 Q4 | Sep 30 2002 | $1.60 | $0.12 | 13.6x | -58% |
| FY2002 Q3 | Jun 30 2002 | $2.94 | $0.15 | 20.1x | -38% |
| FY2002 Q2 | Mar 31 2002 | $2.86 | $0.10 | 28.3x | -13% |
| FY2002 Q1 | Dec 30 2001 | $4.08 | $0.12 | 33.7x | +4% |
| FY2001 Q4 | Sep 30 2001 | $3.54 | $0.12 | 30.8x | -5% |
| FY2001 Q3 | Jul 01 2001 | $4.35 | $0.12 | 37.8x | +16% |
| FY2001 Q2 | Apr 01 2001 | $3.24 | $0.17 | 19.3x | -41% |
| FY2001 Q1 | Dec 31 2000 | $5.10 | $0.16 | 31.9x | -2% |
| FY2000 Q4 | Sep 30 2000 | $4.57 | $0.15 | 29.7x | -9% |
| FY2000 Q3 | Jul 02 2000 | $3.66 | $0.13 | 27.3x | -16% |
| FY2000 Q2 | Apr 02 2000 | $3.80 | $0.13 | 29.2x | -10% |
| FY2000 Q1 | Jan 02 2000 | $2.46 | $0.13 | 19.5x | -40% |
| FY1999 Q4 | - | $2.67 | $0.12 | 22.6x | -30% |
| FY1999 Q3 | Jul 04 1999 | $2.98 | $0.11 | 27.1x | -17% |
| FY1999 Q2 | Apr 04 1999 | $2.67 | $0.10 | 26.7x | -18% |
| FY1999 Q1 | Jan 03 1999 | $3.46 | $0.09 | 37.6x | +16% |
| FY1998 Q4 | Sep 30 1998 | $2.88 | $0.09 | 32.9x | +1% |
| FY1998 Q3 | Jun 28 1998 | $2.44 | $0.08 | 29.2x | -10% |
| FY1998 Q2 | Mar 29 1998 | $2.41 | $0.08 | 30.6x | -6% |
| FY1998 Q1 | Dec 28 1997 | $2.01 | $0.07 | 26.9x | -17% |
| FY1997 Q4 | - | $2.01 | $0.07 | 28.1x | -14% |
| FY1997 Q3 | Jun 29 1997 | $1.88 | $0.07 | 27.9x | -14% |
| FY1997 Q2 | Mar 30 1997 | $1.25 | $0.06 | 20.0x | -39% |
| FY1997 Q1 | Dec 29 1996 | $1.57 | $0.06 | 26.4x | -19% |
| FY1996 Q4 | Sep 30 1996 | $1.95 | $0.06 | 34.7x | +7% |
| FY1996 Q3 | Jun 30 1996 | $1.64 | $0.05 | 31.3x | -4% |
| FY1996 Q2 | Mar 31 1996 | $1.46 | $0.05 | 29.7x | -9% |
| FY1996 Q1 | Dec 31 1995 | $1.49 | $0.05 | 32.4x | -0% |
| FY1995 Q4 | Sep 30 1995 | $1.52 | $0.04 | 34.2x | +5% |
| FY1995 Q3 | Jun 30 1995 | $1.16 | $0.04 | 28.2x | -13% |
| FY1995 Q2 | Mar 31 1995 | $1.02 | $0.04 | 25.8x | -21% |
| FY1995 Q1 | Dec 31 1994 | $0.93 | $0.04 | 24.5x | -25% |
| FY1994 Q4 | Sep 30 1994 | $1.00 | $0.04 | 27.5x | -15% |
| FY1994 Q3 | - | $0.78 | $0.04 | 22.2x | -32% |
| FY1994 Q2 | - | $0.76 | $0.03 | 22.6x | -30% |
| FY1994 Q1 | Dec 31 1993 | $0.82 | $0.03 | 25.7x | -21% |
| FY1993 Q4 | - | $0.65 | $0.03 | 22.9x | -30% |
| FY1993 Q3 | Jun 30 1993 | $0.54 | $0.03 | 21.3x | -34% |
| FY1993 Q2 | Mar 31 1993 | $0.60 | $0.02 | 27.5x | -15% |
| FY1993 Q1 | - | $0.48 | $0.02 | 23.4x | -28% |
| FY1992 Q4 | Sep 30 1992 | $0.46 | $0.02 | 24.3x | -25% |
Average P/E for displayed period: 32.5x
Intrinsic Valuation
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Historical Returns
34+ years return with dividends reinvested.
DCA Calculator
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Peer Comparison
Compare growth, multiples, and margins vs sector.
TTEK — Frequently Asked Questions
Quick answers to the most common questions about buying TTEK stock.
What is TTEK's P/E ratio?
Tetra Tech, Inc. (TTEK) trailing twelve-month P/E ratio is 29.4x, based on TTM diluted EPS of $1.68. The 5-year average P/E is 33.4x and the historical range spans 17.8x to 44.4x.
Is TTEK stock overvalued or undervalued?
TTEK trades at 29.4x P/E, near its 5-year average of 33.4x. The 35th percentile ranking within the 17.8x–44.4x historical range places valuation within normal bounds.
Is TTEK stock expensive?
TTEK is fairly valued relative to its own history. The current P/E of 29.4x is near the 5-year average of 33.4x (35th percentile of historical range).
What is TTEK's historical P/E range?
Over the past 5 years, TTEK's P/E ratio has ranged from 17.8x to 44.4x, with a median of 35.6x and an average of 33.4x. The current P/E of 29.4x places the stock at the 35th percentile of this range. Full historical data spans 1992–2026.
How does TTEK's P/E compare to the S&P 500?
TTEK trades at 29.4x P/E versus the S&P 500 median of 24.4x. The 20% premium to the market typically reflects higher expected earnings growth or quality.
How does TTEK's valuation compare to Industrials peers?
Tetra Tech, Inc. P/E of 29.4x compares to the Industrials sector median of 25.6x. The premium reflects expected growth above peers or stronger fundamentals. See the peer comparison table on this page for ticker-by-ticker P/E and PEG.
What is TTEK's PEG ratio?
TTEK PEG ratio is 3.63, based on a P/E of 29.4x and EPS growth of -24.4%. A PEG above 2.0 indicates a premium valuation relative to earnings growth — typically considered expensive.
What is TTEK's earnings yield?
TTEK earnings yield is 3.40%, the inverse of its 29.4x P/E ratio. Earnings yield represents the percentage of each dollar invested that the company earns. It can be compared directly to bond yields to assess relative attractiveness of stocks versus fixed income.