LDOS vs TTEK: Correlation
Leidos (LDOS) and Tetra Tech, Inc. (TTEK) show a moderate relationship: their 3-year correlation of weekly returns is 0.53.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are LDOS and TTEK?
Across a 3-year window, the weekly returns of LDOS and TTEK correlate at 0.53, moderate. Recent behaviour matches the longer record: 0.49 over 1 year against 0.53 over 3. Stretching to 5 years gives 0.45, with an annualized covariance of 504.9 %².
By 3-year correlation, TTEK places #8 of the 36 assets tracked against LDOS. Correlation aside, the last 12 months split them widely, with TTEK ahead by 22.8 points (-22.9% versus -0.1%).
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
LDOS vs TTEK: side by side
| LDOS (Leidos) | TTEK (Tetra Tech, Inc.) | |
|---|---|---|
| 1-year return | -22.9% | -0.1% |
| 5-year return | +52.1% | +32.3% |
| Volatility (ann.) | 31.4% | 30.3% |
| Beta vs S&P 500 | 0.87 | 0.54 |
| Max drawdown (3Y) | -49.5% | -47.5% |
| Market cap | $17.6B | $9.4B |
| P/E (trailing) | 12.8 | 22.1 |
| Dividend yield | 1.23% | 0.73% |
| Sector / category | Industrials | US Listed |
Year-by-year returns
| Year | LDOS | TTEK |
|---|---|---|
| 2022 | +20.0% | -14.0% |
| 2023 | +4.5% | +15.7% |
| 2024 | +34.5% | +20.0% |
| 2025 | +26.5% | -15.2% |
| 2026 | -22.0% | +9.9% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are LDOS and TTEK good diversifiers for each other?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
FAQ
What is the correlation between LDOS and TTEK?
Using weekly returns as of 2026-08-27: 0.53 over 3 years, with 0.49 over the last year and 0.45 over 5 years.
Is TTEK a good diversifier for LDOS?
Somewhat, no more. With 0.53 correlation, most large moves hit both names, and the diversification benefit stays modest.
What does a correlation of 0.53 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/ldos-vs-ttek.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/ldos-vs-ttek/)
The core API is free. Terms and every endpoint in the API documentation.
Related comparisons
Hubs: LDOS correlations · TTEK correlations
