TMO vs. WSO

Last updated Apr 1, 2026

Compare and contrast key facts about Thermo Fisher Scientific Inc. (TMO) and Watsco, Inc. (WSO).

Performance

TMO vs. WSO - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Thermo Fisher Scientific Inc. (TMO) and Watsco, Inc. (WSO). The values are adjusted to include any dividend payments, if applicable.

TMO vs. WSO - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TMO Thermo Fisher Scientific Inc.	-15.09%	11.78%	-1.72%	-3.36%	-17.29%	43.54%	43.72%	45.55%	18.21%	35.03%
WSO Watsco, Inc.	8.82%	-27.02%	13.22%	77.00%	-17.74%	42.09%	30.57%	34.99%	-15.54%	18.36%

Fundamentals

Market Cap TMO : $185.31B WSO : $13.80B
EPS TMO : $17.77 WSO : $13.84
PE Ratio TMO : 27.67 WSO : 26.28
PS Ratio TMO : 4.17 WSO : 1.90
PB Ratio TMO : 3.47 WSO : 4.28
Total Revenue (TTM) TMO : $44.56B WSO : $7.24B
Gross Profit (TTM) TMO : $18.02B WSO : $2.06B
EBITDA (TTM) TMO : $11.35B WSO : $751.61M

Returns By Period

In the year-to-date period, TMO achieves a -15.09% return, which is significantly lower than WSO's 8.82% return. Both investments have delivered pretty close results over the past 10 years, with TMO having a 13.49% annualized return and WSO not far ahead at 14.03%.

TMO

• 1D: 2.39%
• 1M: -5.58%
• YTD: -15.09%
• 6M: 1.52%
• 1Y: -0.86%
• 3Y*: -4.88%
• 5Y*: 1.77%
• 10Y*: 13.49%

WSO

• 1D: 4.26%
• 1M: -12.83%
• YTD: 8.82%
• 6M: -8.54%
• 1Y: -26.36%
• 3Y*: 7.34%
• 5Y*: 9.38%
• 10Y*: 14.03%

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

Return for Risk

TMO vs. WSO — Risk / Return Rank

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

TMO

TMO Risk / Return Rank: 39
TMO Sharpe Ratio Rank: 41
TMO Sortino Ratio Rank: 36
TMO Omega Ratio Rank: 35
TMO Calmar Ratio Rank: 41
TMO Martin Ratio Rank: 40

WSO

WSO Risk / Return Rank: 14
WSO Sharpe Ratio Rank: 9
WSO Sortino Ratio Rank: 12
WSO Omega Ratio Rank: 13
WSO Calmar Ratio Rank: 18
WSO Martin Ratio Rank: 20

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.

TMO vs. WSO - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Thermo Fisher Scientific Inc. (TMO) and Watsco, Inc. (WSO). 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.

	TMO	WSO	Difference
Sharpe ratio Return per unit of total volatility	-0.03	-0.79	+0.77
Sortino ratio Return per unit of downside risk	0.21	-0.98	+1.19
Omega ratio Gain probability vs. loss probability	1.02	0.88	+0.15
Calmar ratio Return relative to maximum drawdown	-0.05	-0.70	+0.65
Martin ratio Return relative to average drawdown	-0.11	-1.15	+1.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TMO vs. WSO - Sharpe Ratio Comparison

The current TMO Sharpe Ratio is -0.03, which is higher than the WSO Sharpe Ratio of -0.79. The chart below compares the historical Sharpe Ratios of TMO and WSO, 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

	TMO	WSO	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.03	-0.79	+0.77
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.07	0.32	-0.25
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.52	0.51	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.40	0.47	-0.06

Correlation

The correlation between TMO and WSO is 0.27, 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

TMO vs. WSO - Dividend Comparison

TMO's dividend yield for the trailing twelve months is around 0.36%, less than WSO's 3.30% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TMO Thermo Fisher Scientific Inc.	0.36%	0.30%	0.30%	0.26%	0.22%	0.16%	0.19%	0.23%	0.30%	0.32%	0.43%	0.42%
WSO Watsco, Inc.	3.30%	3.47%	2.23%	2.29%	3.43%	2.44%	3.06%	3.55%	4.02%	2.71%	2.43%	2.39%

Drawdowns

TMO vs. WSO - Drawdown Comparison

The maximum TMO drawdown since its inception was -71.16%, which is greater than WSO's maximum drawdown of -64.30%. Use the drawdown chart below to compare losses from any high point for TMO and WSO.

Drawdown Indicators

	TMO	WSO	Difference
Max Drawdown Largest peak-to-trough decline	-71.16%	-64.30%	-6.86%
Max Drawdown (1Y) Largest decline over 1 year	-27.31%	-36.57%	+9.26%
Max Drawdown (5Y) Largest decline over 5 years	-40.95%	-41.62%	+0.67%
Max Drawdown (10Y) Largest decline over 10 years	-40.95%	-41.62%	+0.67%
Current Drawdown Current decline from peak	-25.44%	-33.83%	+8.39%
Average Drawdown Average peak-to-trough decline	-17.97%	-18.02%	+0.05%
Ulcer Index Depth and duration of drawdowns from previous peaks	12.63%	22.10%	-9.47%

Volatility

TMO vs. WSO - Volatility Comparison

The current volatility for Thermo Fisher Scientific Inc. (TMO) is 8.81%, while Watsco, Inc. (WSO) has a volatility of 11.77%. This indicates that TMO experiences smaller price fluctuations and is considered to be less risky than WSO based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TMO	WSO	Difference
Volatility (1M) Calculated over the trailing 1-month period	8.81%	11.77%	-2.96%
Volatility (6M) Calculated over the trailing 6-month period	19.66%	23.57%	-3.91%
Volatility (1Y) Calculated over the trailing 1-year period	32.87%	33.39%	-0.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	26.59%	29.78%	-3.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	25.93%	27.51%	-1.58%

Financials

TMO vs. WSO - Profitability Comparison

The chart below illustrates the profitability comparison between Thermo Fisher Scientific Inc. and Watsco, Inc. over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

TMO - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Thermo Fisher Scientific Inc. reported a gross profit of 5.07B and revenue of 12.22B. Therefore, the gross margin over that period was 41.5%.

WSO - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Watsco, Inc. reported a gross profit of 428.44M and revenue of 1.58B. Therefore, the gross margin over that period was 27.1%.

TMO - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Thermo Fisher Scientific Inc. reported an operating income of 2.26B and revenue of 12.22B, resulting in an operating margin of 18.5%.

WSO - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Watsco, Inc. reported an operating income of 101.53M and revenue of 1.58B, resulting in an operating margin of 6.4%.

TMO - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Thermo Fisher Scientific Inc. reported a net income of 1.97B and revenue of 12.22B, resulting in a net margin of 16.1%.

WSO - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Watsco, Inc. reported a net income of 71.75M and revenue of 1.58B, resulting in a net margin of 4.5%.