ACLS vs. EME

Last updated Jun 4, 2026

ACLS (Axcelis Technologies, Inc.) and EME (EMCOR Group, Inc.) are both stocks. ACLS operates in Semiconductor Equipment & Materials (Technology), while EME operates in Engineering & Construction (Industrials). Over the past 10 years, ACLS returned 30.54%/yr vs 33.77%/yr for EME. At a 0.36 correlation, their price movements are largely independent.

Performance

ACLS vs. EME - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Axcelis Technologies, Inc. (ACLS) and EMCOR Group, Inc. (EME). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ACLS achieves a 98.15% return, which is significantly higher than EME's 37.38% return. Over the past 10 years, ACLS has underperformed EME with an annualized return of 30.54%, while EME has yielded a comparatively higher 33.77% annualized return.

ACLS

• 1D: 0.26%
• 1M: 12.21%
• YTD: 98.15%
• 6M: 80.86%
• 1Y: 168.58%
• 3Y*: -0.66%
• 5Y*: 30.84%
• 10Y*: 30.54%

EME

• 1D: 1.48%
• 1M: -7.77%
• YTD: 37.38%
• 6M: 37.33%
• 1Y: 73.87%
• 3Y*: 69.67%
• 5Y*: 46.30%
• 10Y*: 33.77%

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

ACLS vs. EME - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ACLS Axcelis Technologies, Inc.	98.15%	14.98%	-46.13%	63.42%	6.44%	156.04%	20.83%	35.39%	-37.98%	97.25%
EME EMCOR Group, Inc.	37.38%	35.05%	111.27%	46.03%	16.81%	39.93%	6.47%	45.18%	-26.68%	16.09%

Correlation

The correlation between ACLS and EME is 0.38, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.38
Correlation (3Y) Calculated over the trailing 3-year period	0.39
Correlation (5Y) Calculated over the trailing 5-year period	0.42
Correlation (10Y) Calculated over the trailing 10-year period	0.40
Correlation (All Time) Calculated using the full available price history since Jul 12, 2000	0.36

Fundamentals

Market Cap ACLS : $4.93B EME : $37.82B
EPS ACLS : $3.21 EME : $29.65
PE Ratio ACLS : 49.58 EME : 28.32
PEG Ratio ACLS : 2.92 EME : 0.66
PS Ratio ACLS : 5.92 EME : 2.13
PB Ratio ACLS : 4.72 EME : 9.78
Total Revenue (TTM) ACLS : $845.44M EME : $17.75B
Gross Profit (TTM) ACLS : $368.66M EME : $3.47B
EBITDA (TTM) ACLS : $129.11M EME : $2.03B

Return for Risk

ACLS vs. EME — Risk / Return Rank

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

ACLS

ACLS Risk / Return Rank: 92
ACLS Sharpe Ratio Rank: 94
ACLS Sortino Ratio Rank: 91
ACLS Omega Ratio Rank: 89
ACLS Calmar Ratio Rank: 94
ACLS Martin Ratio Rank: 92

EME

EME Risk / Return Rank: 83
EME Sharpe Ratio Rank: 87
EME Sortino Ratio Rank: 80
EME Omega Ratio Rank: 84
EME Calmar Ratio Rank: 82
EME Martin Ratio Rank: 82

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.

ACLS vs. EME - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Axcelis Technologies, Inc. (ACLS) and EMCOR Group, Inc. (EME). 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.

	ACLS	EME	Difference
Sharpe ratio Return per unit of total volatility	2.99	1.96	+1.02
Sortino ratio Return per unit of downside risk	3.39	2.37	+1.03
Omega ratio Gain probability vs. loss probability	1.43	1.35	+0.08
Calmar ratio Return relative to maximum drawdown	6.47	2.95	+3.52
Martin ratio Return relative to average drawdown	15.03	7.46	+7.57
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ACLS vs. EME - Sharpe Ratio Comparison

The current ACLS Sharpe Ratio is 2.99, which is higher than the EME Sharpe Ratio of 1.96. The chart below compares the historical Sharpe Ratios of ACLS and EME, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	ACLS	EME	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.99	1.96	+1.02
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.57	1.40	-0.83
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.57	1.03	-0.45
Sharpe Ratio (All Time) Calculated using the full available price history	0.03	0.60	-0.57

Drawdowns

ACLS vs. EME - Drawdown Comparison

The maximum ACLS drawdown since its inception was -99.34%, which is greater than EME's maximum drawdown of -70.56%. Use the drawdown chart below to compare losses from any high point for ACLS and EME.

Drawdown Indicators

	ACLS	EME	Difference
Max Drawdown Largest peak-to-trough decline	-99.34%	-70.56%	-28.78%
Max Drawdown (1Y) Largest decline over 1 year	-26.20%	-25.15%	-1.05%
Max Drawdown (3Y) Largest decline over 3 years	-78.84%	-36.19%	-42.65%
Max Drawdown (5Y) Largest decline over 5 years	-78.84%	-36.19%	-42.65%
Max Drawdown (10Y) Largest decline over 10 years	-78.84%	-48.00%	-30.84%
Current Drawdown Current decline from peak	-20.60%	-11.04%	-9.56%
Average Drawdown Average peak-to-trough decline	-72.37%	-15.37%	-57.00%
Ulcer Index Depth and duration of drawdowns from previous peaks	11.26%	9.94%	+1.32%

Volatility

ACLS vs. EME - Volatility Comparison

Axcelis Technologies, Inc. (ACLS) has a higher volatility of 25.94% compared to EMCOR Group, Inc. (EME) at 7.27%. This indicates that ACLS's price experiences larger fluctuations and is considered to be riskier than EME based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ACLS	EME	Difference
Volatility (1M) Calculated over the trailing 1-month period	25.94%	7.27%	+18.67%
Volatility (6M) Calculated over the trailing 6-month period	45.82%	25.45%	+20.37%
Volatility (1Y) Calculated over the trailing 1-year period	57.01%	37.97%	+19.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	54.63%	33.27%	+21.36%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	53.35%	32.94%	+20.41%

Dividends

ACLS vs. EME - Dividend Comparison

ACLS has not paid dividends to shareholders, while EME's dividend yield for the trailing twelve months is around 0.15%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ACLS Axcelis Technologies, Inc.	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
EME EMCOR Group, Inc.	0.15%	0.16%	0.20%	0.32%	0.36%	0.41%	0.35%	0.37%	0.54%	0.39%	0.45%	0.67%

Financials

ACLS vs. EME - Profitability Comparison

The chart below illustrates the profitability comparison between Axcelis Technologies, Inc. and EMCOR Group, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

ACLS - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, Axcelis Technologies, Inc. reported a gross profit of 80.58M and revenue of 198.96M. Therefore, the gross margin over that period was 40.5%.

EME - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, EMCOR Group, Inc. reported a gross profit of 863.95M and revenue of 4.63B. Therefore, the gross margin over that period was 18.7%.

ACLS - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, Axcelis Technologies, Inc. reported an operating income of 7.95M and revenue of 198.96M, resulting in an operating margin of 4.0%.

EME - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, EMCOR Group, Inc. reported an operating income of 403.85M and revenue of 4.63B, resulting in an operating margin of 8.7%.

ACLS - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, Axcelis Technologies, Inc. reported a net income of 9.21M and revenue of 198.96M, resulting in a net margin of 4.6%.

EME - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, EMCOR Group, Inc. reported a net income of 305.48M and revenue of 4.63B, resulting in a net margin of 6.6%.

Frequently Asked Questions

Can I hold both ACLS and EME in my portfolio?

ACLS and EME have a correlation of 0.38, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, ACLS or EME?

ACLS has higher volatility (25.94%) compared to EME (7.27%). In terms of maximum drawdown, ACLS dropped -99.34% vs EME's -70.56%.

Which has better risk-adjusted returns?

ACLS currently has the higher Sharpe Ratio (2.99 vs 1.96), 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.