TTEK vs. LII

Last updated Jun 13, 2026

TTEK (Tetra Tech, Inc.) and LII (Lennox International Inc.) are both stocks. Both are in the Industrials sector — TTEK in Engineering & Construction, LII in Specialty Industrial Machinery. Over the past 10 years, TTEK returned 17.62%/yr vs 15.59%/yr for LII. At a 0.39 correlation, their price movements are largely independent.

Performance

TTEK vs. LII - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Tetra Tech, Inc. (TTEK) and Lennox International Inc. (LII). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TTEK achieves a -14.87% return, which is significantly lower than LII's 5.78% return. Over the past 10 years, TTEK has outperformed LII with an annualized return of 17.62%, while LII has yielded a comparatively lower 15.59% annualized return.

TTEK

• 1D: 1.83%
• 1M: 8.51%
• YTD: -14.87%
• 6M: -17.38%
• 1Y: -20.53%
• 3Y*: -3.02%
• 5Y*: 3.25%
• 10Y*: 17.62%

LII

• 1D: -0.94%
• 1M: -0.43%
• YTD: 5.78%
• 6M: 1.83%
• 1Y: -3.83%
• 3Y*: 19.41%
• 5Y*: 9.92%
• 10Y*: 15.59%

*Multi-year figures are annualized to reflect compound growth (CAGR)

TTEK vs. LII - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TTEK Tetra Tech, Inc.	-14.87%	-15.19%	19.98%	15.74%	-13.96%	47.46%	35.34%	67.76%	8.39%	12.57%
LII Lennox International Inc.	5.78%	-19.54%	37.27%	89.55%	-24.94%	19.71%	13.79%	12.78%	6.33%	37.43%

Correlation

The correlation between TTEK and LII is 0.35, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.35
Correlation (3Y) Calculated over the trailing 3-year period	0.39
Correlation (5Y) Calculated over the trailing 5-year period	0.45
Correlation (10Y) Calculated over the trailing 10-year period	0.41
Correlation (All Time) Calculated using the full available price history since Jul 29, 1999	0.39

The correlation between TTEK and LII shifts across timeframes, from 0.35 (1 year) to 0.45 (5 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap TTEK : $7.46B LII : $17.93B
EPS TTEK : $2.20 LII : $22.20
PE Ratio TTEK : 12.95 LII : 23.07
PEG Ratio TTEK : 3.32 LII : 1.40
PS Ratio TTEK : 1.53 LII : 3.44
PB Ratio TTEK : 4.00 LII : 14.77
Total Revenue (TTM) TTEK : $4.91B LII : $5.26B
Gross Profit (TTM) TTEK : $960.15M LII : $1.74B
EBITDA (TTM) TTEK : $627.52M LII : $1.10B

Return for Risk

TTEK vs. LII — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

TTEK

TTEK Risk / Return Rank: 18
TTEK Sharpe Ratio Rank: 17
TTEK Sortino Ratio Rank: 17
TTEK Omega Ratio Rank: 17
TTEK Calmar Ratio Rank: 23
TTEK Martin Ratio Rank: 15

LII

LII Risk / Return Rank: 35
LII Sharpe Ratio Rank: 36
LII Sortino Ratio Rank: 32
LII Omega Ratio Rank: 32
LII Calmar Ratio Rank: 37
LII Martin Ratio Rank: 38

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

TTEK vs. LII - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Tetra Tech, Inc. (TTEK) and Lennox International Inc. (LII). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	TTEK	LII	Difference
Sharpe ratio: Return per unit of total volatility	-0.60	-0.17	-0.43
Sortino ratio: Return per unit of downside risk	-0.70	0.00	-0.70
Omega ratio: Gain probability vs. loss probability	0.91	1.00	-0.09
Calmar ratio: Return relative to maximum drawdown	-0.55	-0.18	-0.37
Martin ratio: Return relative to average drawdown	-1.21	-0.29	-0.92

TTEK vs. LII - Sharpe Ratio Comparison

The current TTEK Sharpe Ratio is -0.60, which is lower than the LII Sharpe Ratio of -0.17. The chart below compares the historical Sharpe Ratios of TTEK and LII, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

TTEK vs. LII - Drawdown Comparison

The maximum TTEK drawdown since its inception was -77.89%, which is greater than LII's maximum drawdown of -62.76%. Use the drawdown chart below to compare losses from any high point for TTEK and LII.

Drawdown Indicators

	TTEK	LII	Difference
Max Drawdown Largest peak-to-trough decline	-77.89%	-62.76%	-15.13%
Max Drawdown (1Y) Largest decline over 1 year	-38.30%	-33.77%	-4.53%
Max Drawdown (3Y) Largest decline over 3 years	-47.50%	-34.71%	-12.79%
Max Drawdown (5Y) Largest decline over 5 years	-47.50%	-46.88%	-0.62%
Max Drawdown (10Y) Largest decline over 10 years	-47.50%	-46.88%	-0.62%
Current Drawdown Current decline from peak	-42.99%	-23.42%	-19.57%
Average Drawdown Average peak-to-trough decline	-20.67%	-14.51%	-6.16%
Ulcer Index Depth and duration of drawdowns from previous peaks	17.36%	20.90%	-3.54%

Volatility

TTEK vs. LII - Volatility Comparison

The current volatility for Tetra Tech, Inc. (TTEK) is 9.50%, while Lennox International Inc. (LII) has a volatility of 10.80%. This indicates that TTEK experiences smaller price fluctuations and is considered to be less risky than LII based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TTEK	LII	Difference
Volatility (1M) Calculated over the trailing 1-month period	9.50%	10.80%	-1.30%
Volatility (6M) Calculated over the trailing 6-month period	27.30%	26.49%	+0.81%
Volatility (1Y) Calculated over the trailing 1-year period	35.21%	35.30%	-0.09%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	32.09%	32.15%	-0.06%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.05%	29.31%	+2.74%

Dividends

TTEK vs. LII - Dividend Comparison

TTEK's dividend yield for the trailing twelve months is around 0.94%, less than LII's 1.02% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
LII Lennox International Inc.	1.02%	1.04%	0.75%	0.97%	1.71%	1.09%	1.12%	1.21%	1.11%	0.94%	1.08%	1.10%
TTEK Tetra Tech, Inc.	0.94%	0.75%	0.57%	0.61%	0.61%	0.45%	0.57%	0.66%	0.89%	0.81%	0.81%	1.19%

Financials

TTEK vs. LII - Profitability Comparison

The chart below illustrates the profitability comparison between Tetra Tech, Inc. and Lennox International Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

TTEK - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Tetra Tech, Inc. reported a gross profit of 214.09M and revenue of 1.22B. Therefore, the gross margin over that period was 17.6%.

LII - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Lennox International Inc. reported a gross profit of 351.30M and revenue of 1.14B. Therefore, the gross margin over that period was 31.0%.

TTEK - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Tetra Tech, Inc. reported an operating income of 131.52M and revenue of 1.22B, resulting in an operating margin of 10.8%.

LII - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Lennox International Inc. reported an operating income of 163.50M and revenue of 1.14B, resulting in an operating margin of 14.4%.

TTEK - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Tetra Tech, Inc. reported a net income of 233.58M and revenue of 1.22B, resulting in a net margin of 19.1%.

LII - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Lennox International Inc. reported a net income of 117.20M and revenue of 1.14B, resulting in a net margin of 10.3%.

Frequently Asked Questions

Can I hold both TTEK and LII in my portfolio?

TTEK and LII have a correlation of 0.35, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TTEK or LII?

LII has higher volatility (10.80%) compared to TTEK (9.50%). In terms of maximum drawdown, TTEK dropped -77.89% vs LII's -62.76%.

Which has better risk-adjusted returns?

LII currently has the higher Sharpe Ratio (-0.17 vs -0.60), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.