TTEK vs. ATMU

Last updated Jun 23, 2026

TTEK (Tetra Tech, Inc.) and ATMU (Atmus Filtration Technologies Inc.) are both stocks. Both are in the Industrials sector — TTEK in Engineering & Construction, ATMU in Pollution & Treatment Controls. Over the past 3 years, TTEK returned -4.47%/yr vs 33.71%/yr for ATMU. At a 0.24 correlation, their price movements are largely independent.

Performance

TTEK vs. ATMU - Performance Comparison

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

Returns By Period

In the year-to-date period, TTEK achieves a -18.71% return, which is significantly lower than ATMU's 0.60% return.

TTEK

• 1D: -0.77%
• 1M: -1.81%
• YTD: -18.71%
• 6M: -20.83%
• 1Y: -22.23%
• 3Y*: -4.47%
• 5Y*: 3.21%
• 10Y*: 17.02%

ATMU

• 1D: 0.64%
• 1M: 6.86%
• YTD: 0.60%
• 6M: -3.20%
• 1Y: 49.39%
• 3Y*: 33.71%
• 5Y*: —
• 10Y*: —

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

TTEK vs. ATMU - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
TTEK Tetra Tech, Inc.	-18.71%	-15.19%	19.98%	26.27%
ATMU Atmus Filtration Technologies Inc.	0.60%	33.16%	67.28%	8.40%

Correlation

The correlation between TTEK and ATMU is 0.28, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.28
Correlation (3Y) Calculated over the trailing 3-year period	0.26
Correlation (All Time) Calculated using the full available price history since May 26, 2023	0.24

Fundamentals

Market Cap TTEK : $7.13B ATMU : $4.27B
EPS TTEK : $2.20 ATMU : $2.56
PE Ratio TTEK : 12.37 ATMU : 20.38
PEG Ratio TTEK : 3.17 ATMU : 3.67
PS Ratio TTEK : 1.46 ATMU : 3.19
PB Ratio TTEK : 3.82 ATMU : 10.59
Total Revenue (TTM) TTEK : $4.91B ATMU : $1.35B
Gross Profit (TTM) TTEK : $960.15M ATMU : $529.00M
EBITDA (TTM) TTEK : $627.52M ATMU : $334.60M

Return for Risk

TTEK vs. ATMU — Risk / Return Rank

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

TTEK

TTEK Risk / Return Rank: 16
TTEK Sharpe Ratio Rank: 15
TTEK Sortino Ratio Rank: 15
TTEK Omega Ratio Rank: 16
TTEK Calmar Ratio Rank: 20
TTEK Martin Ratio Rank: 14

ATMU

ATMU Risk / Return Rank: 75
ATMU Sharpe Ratio Rank: 80
ATMU Sortino Ratio Rank: 73
ATMU Omega Ratio Rank: 76
ATMU Calmar Ratio Rank: 72
ATMU Martin Ratio Rank: 76

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. ATMU - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Tetra Tech, Inc. (TTEK) and Atmus Filtration Technologies Inc. (ATMU). 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	ATMU	Difference
Sharpe ratio: Return per unit of total volatility	-0.63	1.37	-2.00
Sortino ratio: Return per unit of downside risk	-0.75	1.79	-2.54
Omega ratio: Gain probability vs. loss probability	0.90	1.26	-0.36
Calmar ratio: Return relative to maximum drawdown	-0.58	1.64	-2.22
Martin ratio: Return relative to average drawdown	-1.24	5.01	-6.25

TTEK vs. ATMU - Sharpe Ratio Comparison

The current TTEK Sharpe Ratio is -0.63, which is lower than the ATMU Sharpe Ratio of 1.37. The chart below compares the historical Sharpe Ratios of TTEK and ATMU, 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. ATMU - Drawdown Comparison

The maximum TTEK drawdown since its inception was -77.89%, which is greater than ATMU's maximum drawdown of -30.22%. Use the drawdown chart below to compare losses from any high point for TTEK and ATMU.

Drawdown Indicators

	TTEK	ATMU	Difference
Max Drawdown Largest peak-to-trough decline	-77.89%	-30.22%	-47.67%
Max Drawdown (1Y) Largest decline over 1 year	-38.30%	-30.22%	-8.08%
Max Drawdown (3Y) Largest decline over 3 years	-47.50%	-30.22%	-17.28%
Max Drawdown (5Y) Largest decline over 5 years	-47.50%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-47.50%	—	—
Current Drawdown Current decline from peak	-45.56%	-20.42%	-25.14%
Average Drawdown Average peak-to-trough decline	-20.68%	-8.75%	-11.93%
Ulcer Index Depth and duration of drawdowns from previous peaks	18.02%	9.88%	+8.14%

Volatility

TTEK vs. ATMU - Volatility Comparison

The current volatility for Tetra Tech, Inc. (TTEK) is 8.83%, while Atmus Filtration Technologies Inc. (ATMU) has a volatility of 10.54%. This indicates that TTEK experiences smaller price fluctuations and is considered to be less risky than ATMU based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TTEK	ATMU	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.83%	10.54%	-1.71%
Volatility (6M) Calculated over the trailing 6-month period	27.35%	30.93%	-3.58%
Volatility (1Y) Calculated over the trailing 1-year period	35.38%	36.35%	-0.97%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	32.05%	34.43%	-2.38%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	32.08%	34.43%	-2.35%

Dividends

TTEK vs. ATMU - Dividend Comparison

TTEK's dividend yield for the trailing twelve months is around 0.98%, more than ATMU's 0.42% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ATMU Atmus Filtration Technologies Inc.	0.42%	0.40%	0.26%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
TTEK Tetra Tech, Inc.	0.98%	0.75%	0.57%	0.61%	0.61%	0.45%	0.57%	0.66%	0.89%	0.81%	0.81%	1.19%

Financials

Frequently Asked Questions

Can I hold both TTEK and ATMU in my portfolio?

TTEK and ATMU have a correlation of 0.28, 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 ATMU?

ATMU has higher volatility (10.54%) compared to TTEK (8.83%). In terms of maximum drawdown, TTEK dropped -77.89% vs ATMU's -30.22%.

Which has better risk-adjusted returns?

ATMU currently has the higher Sharpe Ratio (1.37 vs -0.63), 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.