TTEK
Tetra Tech
PE ratio, current and historical analysis
- Stocks
- Industrials
- NASDAQ: TTEK
- PE Ratio
As of Aug 21, 2026, the TTEK stock has a P/E ratio of 22.16. The calculation is based on the latest EPS of $1.67 and the stock price of $37 per share. A decrease of 8% has been observed in the PE ratio compared to its average of 24.0 of the past four quarters.
TTEK PE ratio history
The mean historical PE ratio of Tetra Tech over the last ten years is 29.23. The current 22.16 price-to-earnings ratio is 24% less than the historical average. Analyzing the last ten years, TTEK's PE ratio reached its highest point in the Jun 2025 quarter at 44, with a price of $35.64 and an EPS of $0.81. The Jun 2026 quarter saw the lowest point at 17.52, with a price of $29.26 and an EPS of $1.67.
Tetra Tech PE ratio by year
Maximum annual increase: 158.7% in 2015
Maximum annual decrease: -36.2% in 2016
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| 2025 | 35.46 | -4.47% | $33.33 | $0.94 |
| 2024 | 37.12 | 25.75% | $46.4 | $1.25 |
| 2023 | 29.52 | 12.54% | $30.41 | $1.03 |
| 2022 | 26.23 | -25.74% | $25.71 | $0.98 |
| 2021 | 35.32 | 23.84% | $30.37 | $0.86 |
| 2020 | 28.52 | -2.63% | $18.25 | $0.64 |
| 2019 | 29.29 | 5.06% | $16.99 | $0.58 |
| 2018 | 27.88 | 22.77% | $13.66 | $0.49 |
| 2017 | 22.71 | -7.15% | $9.31 | $0.41 |
| 2016 | 24.46 | -36.2% | $7.09 | $0.29 |
| 2015 | 38.34 | 158.7% | $4.98 | $0.13 |
| 2014 | 14.82 | N/A | $5.04 | $0.34 |
| 2013 | N/A | N/A | $5.2 | -$0.01 |
| 2012 | 15.92 | 23.22% | $5.25 | $0.33 |
| 2011 | 12.92 | -23.78% | $3.75 | $0.29 |
Tetra Tech PE ratio by quarter (TTM)
| Year | PE ratio | PE change | Price | EPS |
|---|---|---|---|---|
| Jun 2026 | 17.52 | -1.18% | $29.26 | $1.67 |
| Mar 2026 | 17.73 | -30.2% | $29.78 | $1.68 |
| Dec 2025 | 25.4 | -28.37% | $34.03 | $1.34 |
| Sep 2025 | 35.46 | -19.41% | $33.33 | $0.94 |
| Jun 2025 | 44 | 5.67% | $35.64 | $0.81 |
| Mar 2025 | 41.64 | 1.41% | $29.15 | $0.7 |
| Dec 2024 | 41.06 | 10.61% | $39.83 | $0.97 |
| Sep 2024 | 37.12 | -1.07% | $46.4 | $1.25 |
| Jun 2024 | 37.52 | 1.57% | $40.9 | $1.09 |
| Mar 2024 | 36.94 | -3.73% | $36.94 | $1 |
| Dec 2023 | 38.37 | 29.98% | $33.39 | $0.87 |
| Oct 2023 | 29.52 | 2.75% | $30.41 | $1.03 |
| Jul 2023 | 28.73 | 10.5% | $32.75 | $1.14 |
| Apr 2023 | 26 | 4.75% | $29.38 | $1.13 |
| Jan 2023 | 24.82 | -5.38% | $29.04 | $1.17 |
TTEK Price vs fair value
TTEK average PE ratio chart
What this chart measures
The Historical Valuation Regime chart shows where the stock's current valuation sits relative to its own historical valuation range over the selected lookback period.
This is a history-relative tool, not a market-relative percentile. It does not compare the stock to other companies. Instead, it compares each historical valuation reading to the stock's own past readings.
Percentile logic
The threshold lines are calculated them from the stock's real historical values using percentile interpolation. That is why some colored bands are narrow while others are wide: the band widths reflect how the stock actually traded through time.
Regime map
| Historical percentile | Regime | Chart meaning |
|---|---|---|
| 0-10 | Historically Low | Deep cheap zone |
| >10-25 | Below Average | Cheap relative to history |
| >25-75 | Average | Within the normal historical range |
| >75-90 | Above Average | Expensive relative to history |
| >90-100 | Historically High | Extreme or stretched valuation |
How to read each part
| Chart element | What it tells you |
|---|---|
| Main line | The actual historical valuation values over time for the selected metric. |
| Dashed horizontal lines | The stock's computed P10, P25, Median, P75, and P90 thresholds for the selected period. |
| Colored bands | The historical valuation zones between those thresholds. |
| Metric boxes | Current ratio, historical median, current percentile, and current regime. |
| Timeline strip | A condensed regime history showing how the stock moved between cheap, fair, and expensive states across each observation. |
Important metric definitions
Current Percentile is the percentile rank of the latest valid historical observation within the selected lookback range.
Current Regime is assigned directly from the latest observation's percentile bucket using the fixed 10 / 25 / 75 / 90 cutoffs shown above.
How to use it well
This chart is most useful for answering a narrow question: Is this stock trading high, low, or normal relative to its own history? It works best alongside growth, profitability, and forward-looking business analysis, because a stock can deserve a higher or lower regime if its business quality has changed.
TTEK's current PE ratio is under its 3, 5 and 10-year averages.
PE comparison
Tetra Tech's price to earnings (P/E) of 22.16 is lower than the Industrials sector, the industry and its peers average. Looking at the Industrials sector average of 26.8, Tetra Tech's price to earnings (P/E) is 17% lower.
TTEK PE vs peers
Frequently asked questions
What is Tetra Tech's PE ratio?
TTEK's price to earnings ratio is 22.16 as of Aug 21, 2026.
What is the 3-year average PE ratio for Tetra Tech (TTEK)?
The 3-year average PE ratio for TTEK stock is 33.52.
What is the 5-year average PE ratio for Tetra Tech (TTEK)?
The 5-year average PE ratio for TTEK stock is 32.19.
What is the highest PE ratio for TTEK?
Over the last ten years, the quarterly PE ratio reached its highest level at 44 in the Jun 2025 quarter.
How does the current PE ratio for TTEK compare to its historical average?
TTEK's current price to earnings ratio is 24% below its 10-year historical average.
How is TTEK's PE ratio calculated (Tetra Tech PE ratio formula)?
The P/E ratio is calculated by dividing the latest price of a stock by its trailing twelve months EPS. As of today (Aug 21, 2026), Tetra Tech's share price is $37. The company's earnings per share for the trailing twelve months (TTM) ending Jun 2026 is $1.67. Therefore, Tetra Tech's price to earnings ratio for today is 22.16. PE RATIO(22.16) = STOCK PRICE($37) / TTM EPS($1.67)
All PE ratio stats are based on quarterly TTM periods, unless otherwise specified.