Tetra Tech, Inc. (TTEK) P/E Ratio History
Historical price-to-earnings valuation from 1992 to 2026
Loading P/E history...
TTEK Valuation Context
How does the current P/E compare to historical and market benchmarks?
P/E Ratio Analysis
As of May 6, 2026, Tetra Tech, Inc. (TTEK) trades at a price-to-earnings ratio of 34.0x, with a stock price of $31.65 and trailing twelve-month earnings per share of $1.68.
The current P/E is roughly in line with 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 40th percentile of its historical range.
Compared to the Industrials sector median P/E of 25.7x, TTEK trades at a 33% premium to its sector peers. The sector includes 416 companies with P/E ratios ranging from 0.0x to 183.1x.
The PEG ratio of 4.20 (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 25.1x. 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 P/E vs Peers
P/E ratio compared to closely matched public peers
| Company | Market Cap | P/E Ratio | PEG Ratio | EPS Growth (1Y) |
|---|---|---|---|---|
| $11B | 20.1Lowest | - | +43% | |
| $3B | 31.9 | 5.35 | -2% | |
| $11B | 40.4 | 2.20 | +52% | |
| $1B | 22.0 | - | +121% | |
| $116B | 113.5 | 6.58 | +13% | |
| $34B | 86.3 | 29.06 | +146% | |
| $25B | 85.9 | 1.94Best | +13% | |
| $6B | 39.0 | - | +39% | |
| $7B | 62.2 | 3.73 | +311%Best | |
| $25B | 22.1 | 2.80 | +6% |
Peers sorted by market capitalization. P/E below peers may indicate undervaluation or lower growth expectations. Consider PEG ratio for growth-adjusted comparison.
TTEK Historical P/E Data (1992–2026)
Quarterly P/E ratios calculated from closing price and TTM EPS
| Quarter | Date | Price | TTM EPS | P/E Ratio | vs Avg |
|---|---|---|---|---|---|
| FY2026 Q2 | Sun Mar 29 2026 00:00:00 GM | $29.78 | $1.67 | 17.8x | -45% |
| FY2026 Q1 | Sun Dec 28 2025 00:00:00 GM | $34.03 | $1.33 | 25.6x | -21% |
| FY2025 Q4 | Sun Sep 28 2025 00:00:00 GM | $33.33 | $0.93 | 35.7x | +10% |
| FY2025 Q3 | Sun Jun 29 2025 00:00:00 GM | $35.64 | $0.80 | 44.4x | +37% |
| FY2025 Q2 | Sun Mar 30 2025 00:00:00 GM | $29.15 | $0.69 | 42.1x | +30% |
| FY2025 Q1 | Sun Dec 29 2024 00:00:00 GM | $39.83 | $0.95 | 41.8x | +29% |
| FY2024 Q4 | Mon Sep 30 2024 00:00:00 GM | $47.16 | $1.23 | 38.3x | +18% |
| FY2024 Q3 | Sun Jun 30 2024 00:00:00 GM | $40.90 | $1.08 | 37.9x | +17% |
| FY2024 Q2 | Sun Mar 31 2024 00:00:00 GM | $36.94 | $0.98 | 37.7x | +16% |
| FY2024 Q1 | Sun Dec 31 2023 00:00:00 GM | $33.39 | $0.86 | 38.8x | +20% |
| FY2023 Q4 | Sat Sep 30 2023 00:00:00 GM | $30.41 | $1.02 | 29.8x | -8% |
| FY2023 Q3 | Sun Jul 02 2023 00:00:00 GM | $32.75 | $1.13 | 29.0x | -11% |
Average P/E for displayed period: 32.5x
See TTEK's True Return
Price is only half the story. See total return with reinvested dividends.
Launch CalculatorIs TTEK Undervalued?
DCF intrinsic value, peer multiples, and analyst estimates — see what the stock is really worth.
View ValuationCompare TTEK vs SPIR
Side-by-side business, growth, and profitability comparison vs Spire Global, Inc..
Start ComparisonTTEK — Frequently Asked Questions
Quick answers to the most common questions about buying TTEK stock.
Is TTEK stock overvalued or undervalued?
TTEK trades at 34.0x P/E, near its 5-year average of 33.4x. The 40th percentile ranking places valuation within normal historical bounds.
How does TTEK's valuation compare to peers?
Tetra Tech, Inc. P/E of 34.0x compares to sector median of 25.7x. The premium reflects expected growth above peers.
What is TTEK's PEG ratio?
TTEK PEG ratio is 4.20. Above 2.0 indicates premium valuation relative to growth rate. Historical P/E data spans 1992-2026.