IRTC vs. FIX

Last updated Apr 1, 2026

Compare and contrast key facts about iRhythm Technologies, Inc. (IRTC) and Comfort Systems USA, Inc. (FIX).

Performance

IRTC vs. FIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in iRhythm Technologies, Inc. (IRTC) and Comfort Systems USA, Inc. (FIX). The values are adjusted to include any dividend payments, if applicable.

IRTC vs. FIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IRTC iRhythm Technologies, Inc.	-33.49%	96.78%	-15.76%	14.27%	-20.41%	-50.39%	248.38%	-2.00%	23.96%	86.83%
FIX Comfort Systems USA, Inc.	47.83%	120.86%	106.89%	79.62%	16.98%	88.98%	6.73%	15.07%	0.73%	32.13%

Fundamentals

Market Cap IRTC : $3.93B FIX : $48.70B
EPS IRTC : -$1.37 FIX : $28.93
PS Ratio IRTC : 5.13 FIX : 5.36
PB Ratio IRTC : 25.75 FIX : 19.89
Total Revenue (TTM) IRTC : $747.14M FIX : $9.10B
Gross Profit (TTM) IRTC : $527.25M FIX : $2.20B
EBITDA (TTM) IRTC : -$21.66M FIX : $1.42B

Returns By Period

In the year-to-date period, IRTC achieves a -33.49% return, which is significantly lower than FIX's 47.83% return.

IRTC

• 1D: 3.34%
• 1M: -11.76%
• YTD: -33.49%
• 6M: -31.38%
• 1Y: 12.74%
• 3Y*: -1.64%
• 5Y*: -2.97%
• 10Y*: —

FIX

• 1D: 8.31%
• 1M: -3.47%
• YTD: 47.83%
• 6M: 67.30%
• 1Y: 329.03%
• 3Y*: 112.20%
• 5Y*: 79.33%
• 10Y*: 46.46%

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

Return for Risk

IRTC vs. FIX — Risk / Return Rank

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

IRTC

IRTC Risk / Return Rank: 50
IRTC Sharpe Ratio Rank: 52
IRTC Sortino Ratio Rank: 51
IRTC Omega Ratio Rank: 49
IRTC Calmar Ratio Rank: 50
IRTC Martin Ratio Rank: 51

FIX

FIX Risk / Return Rank: 99
FIX Sharpe Ratio Rank: 100
FIX Sortino Ratio Rank: 99
FIX Omega Ratio Rank: 98
FIX Calmar Ratio Rank: 100
FIX Martin Ratio Rank: 100

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.

IRTC vs. FIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for iRhythm Technologies, Inc. (IRTC) and Comfort Systems USA, Inc. (FIX). 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.

	IRTC	FIX	Difference
Sharpe ratio Return per unit of total volatility	0.28	5.97	-5.69
Sortino ratio Return per unit of downside risk	0.81	5.33	-4.52
Omega ratio Gain probability vs. loss probability	1.10	1.74	-0.64
Calmar ratio Return relative to maximum drawdown	0.31	23.72	-23.42
Martin ratio Return relative to average drawdown	0.88	80.80	-79.91
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IRTC vs. FIX - Sharpe Ratio Comparison

The current IRTC Sharpe Ratio is 0.28, which is lower than the FIX Sharpe Ratio of 5.97. The chart below compares the historical Sharpe Ratios of IRTC and FIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	IRTC	FIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.28	5.97	-5.69
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.04	1.82	-1.86
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	1.11	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.28	0.38	-0.10

Correlation

The correlation between IRTC and FIX is 0.26, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

IRTC vs. FIX - Dividend Comparison

IRTC has not paid dividends to shareholders, while FIX's dividend yield for the trailing twelve months is around 0.16%.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IRTC iRhythm 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%
FIX Comfort Systems USA, Inc.	0.16%	0.21%	0.28%	0.41%	0.49%	0.49%	0.81%	0.79%	0.76%	0.68%	0.83%	0.88%

Drawdowns

IRTC vs. FIX - Drawdown Comparison

The maximum IRTC drawdown since its inception was -84.39%, smaller than the maximum FIX drawdown of -93.36%. Use the drawdown chart below to compare losses from any high point for IRTC and FIX.

Drawdown Indicators

	IRTC	FIX	Difference
Max Drawdown Largest peak-to-trough decline	-84.39%	-93.36%	+8.97%
Max Drawdown (1Y) Largest decline over 1 year	-40.29%	-13.77%	-26.52%
Max Drawdown (5Y) Largest decline over 5 years	-69.46%	-46.05%	-23.41%
Max Drawdown (10Y) Largest decline over 10 years	—	-49.68%	—
Current Drawdown Current decline from peak	-56.04%	-6.23%	-49.81%
Average Drawdown Average peak-to-trough decline	-36.70%	-38.30%	+1.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	14.02%	4.04%	+9.98%

Volatility

IRTC vs. FIX - Volatility Comparison

The current volatility for iRhythm Technologies, Inc. (IRTC) is 10.20%, while Comfort Systems USA, Inc. (FIX) has a volatility of 20.47%. This indicates that IRTC experiences smaller price fluctuations and is considered to be less risky than FIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IRTC	FIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	10.20%	20.47%	-10.27%
Volatility (6M) Calculated over the trailing 6-month period	28.75%	40.82%	-12.07%
Volatility (1Y) Calculated over the trailing 1-year period	45.70%	55.55%	-9.85%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	66.51%	43.92%	+22.59%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	62.05%	42.12%	+19.93%

Financials

IRTC vs. FIX - Profitability Comparison

The chart below illustrates the profitability comparison between iRhythm Technologies, Inc. and Comfort Systems USA, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

IRTC - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, iRhythm Technologies, Inc. reported a gross profit of 148.06M and revenue of 208.89M. Therefore, the gross margin over that period was 70.9%.

FIX - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Comfort Systems USA, Inc. reported a gross profit of 674.72M and revenue of 2.65B. Therefore, the gross margin over that period was 25.5%.

IRTC - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, iRhythm Technologies, Inc. reported an operating income of 2.29M and revenue of 208.89M, resulting in an operating margin of 1.1%.

FIX - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Comfort Systems USA, Inc. reported an operating income of 426.74M and revenue of 2.65B, resulting in an operating margin of 16.1%.

IRTC - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, iRhythm Technologies, Inc. reported a net income of 5.58M and revenue of 208.89M, resulting in a net margin of 2.7%.

FIX - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Comfort Systems USA, Inc. reported a net income of 330.81M and revenue of 2.65B, resulting in a net margin of 12.5%.