WTS vs. ARM

Last updated Apr 1, 2026

Compare and contrast key facts about Watts Water Technologies, Inc. (WTS) and Arm Holdings plc American Depositary Shares (ARM).

Performance

WTS vs. ARM - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Watts Water Technologies, Inc. (WTS) and Arm Holdings plc American Depositary Shares (ARM). The values are adjusted to include any dividend payments, if applicable.

WTS vs. ARM - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023
WTS Watts Water Technologies, Inc.	5.34%	36.85%	-1.62%	15.12%
ARM Arm Holdings plc American Depositary Shares	38.40%	-11.39%	64.16%	18.17%

Fundamentals

Market Cap WTS : $9.70B ARM : $161.72B
EPS WTS : $10.18 ARM : $0.75
PE Ratio WTS : 28.51 ARM : 201.64
PEG Ratio WTS : 1.33 ARM : 5.55
PS Ratio WTS : 3.98 ARM : 34.58
PB Ratio WTS : 4.78 ARM : 20.74
Total Revenue (TTM) WTS : $2.44B ARM : $4.67B
Gross Profit (TTM) WTS : $1.21B ARM : $4.46B
EBITDA (TTM) WTS : $509.60M ARM : $1.05B

Returns By Period

In the year-to-date period, WTS achieves a 5.34% return, which is significantly lower than ARM's 38.40% return.

WTS

• 1D: 2.29%
• 1M: -11.70%
• YTD: 5.34%
• 6M: 4.30%
• 1Y: 43.42%
• 3Y*: 20.87%
• 5Y*: 20.13%
• 10Y*: 19.14%

ARM

• 1D: 10.46%
• 1M: 18.70%
• YTD: 38.40%
• 6M: 6.92%
• 1Y: 41.66%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

Return for Risk

WTS vs. ARM — Risk / Return Rank

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

WTS

WTS Risk / Return Rank: 85
WTS Sharpe Ratio Rank: 85
WTS Sortino Ratio Rank: 86
WTS Omega Ratio Rank: 83
WTS Calmar Ratio Rank: 85
WTS Martin Ratio Rank: 89

ARM

ARM Risk / Return Rank: 65
ARM Sharpe Ratio Rank: 67
ARM Sortino Ratio Rank: 68
ARM Omega Ratio Rank: 65
ARM Calmar Ratio Rank: 64
ARM Martin Ratio Rank: 62

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.

WTS vs. ARM - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Watts Water Technologies, Inc. (WTS) and Arm Holdings plc American Depositary Shares (ARM). 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.

	WTS	ARM	Difference
Sharpe ratio Return per unit of total volatility	1.55	0.71	+0.84
Sortino ratio Return per unit of downside risk	2.46	1.45	+1.01
Omega ratio Gain probability vs. loss probability	1.31	1.18	+0.13
Calmar ratio Return relative to maximum drawdown	2.81	0.97	+1.83
Martin ratio Return relative to average drawdown	10.00	1.95	+8.04
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

WTS vs. ARM - Sharpe Ratio Comparison

The current WTS Sharpe Ratio is 1.55, which is higher than the ARM Sharpe Ratio of 0.71. The chart below compares the historical Sharpe Ratios of WTS and ARM, 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

	WTS	ARM	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.55	0.71	+0.84
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.73	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.68	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.34	0.56	-0.23

Correlation

The correlation between WTS and ARM 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

WTS vs. ARM - Dividend Comparison

WTS's dividend yield for the trailing twelve months is around 0.72%, while ARM has not paid dividends to shareholders.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
WTS Watts Water Technologies, Inc.	0.72%	0.72%	0.81%	0.66%	0.79%	0.52%	0.76%	0.90%	1.27%	0.99%	1.09%	1.33%
ARM Arm Holdings plc American Depositary Shares	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

WTS vs. ARM - Drawdown Comparison

The maximum WTS drawdown since its inception was -63.68%, which is greater than ARM's maximum drawdown of -53.97%. Use the drawdown chart below to compare losses from any high point for WTS and ARM.

Drawdown Indicators

	WTS	ARM	Difference
Max Drawdown Largest peak-to-trough decline	-63.68%	-53.97%	-9.71%
Max Drawdown (1Y) Largest decline over 1 year	-15.45%	-41.47%	+26.02%
Max Drawdown (5Y) Largest decline over 5 years	-44.08%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-44.08%	—	—
Current Drawdown Current decline from peak	-13.51%	-18.87%	+5.36%
Average Drawdown Average peak-to-trough decline	-16.23%	-22.29%	+6.06%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.34%	20.67%	-16.33%

Volatility

WTS vs. ARM - Volatility Comparison

The current volatility for Watts Water Technologies, Inc. (WTS) is 6.31%, while Arm Holdings plc American Depositary Shares (ARM) has a volatility of 23.62%. This indicates that WTS experiences smaller price fluctuations and is considered to be less risky than ARM based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	WTS	ARM	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.31%	23.62%	-17.31%
Volatility (6M) Calculated over the trailing 6-month period	17.50%	39.06%	-21.56%
Volatility (1Y) Calculated over the trailing 1-year period	28.08%	58.98%	-30.90%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	27.83%	72.68%	-44.85%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	28.19%	72.68%	-44.49%

Financials

WTS vs. ARM - Profitability Comparison

The chart below illustrates the profitability comparison between Watts Water Technologies, Inc. and Arm Holdings plc American Depositary Shares over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

WTS - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Watts Water Technologies, Inc. reported a gross profit of 309.20M and revenue of 625.10M. Therefore, the gross margin over that period was 49.5%.

ARM - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Apr 2026, Arm Holdings plc American Depositary Shares reported a gross profit of 1.17B and revenue of 1.24B. Therefore, the gross margin over that period was 94.2%.

WTS - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Watts Water Technologies, Inc. reported an operating income of 113.70M and revenue of 625.10M, resulting in an operating margin of 18.2%.

ARM - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Apr 2026, Arm Holdings plc American Depositary Shares reported an operating income of 191.00M and revenue of 1.24B, resulting in an operating margin of 15.4%.

WTS - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Watts Water Technologies, Inc. reported a net income of 83.70M and revenue of 625.10M, resulting in a net margin of 13.4%.

ARM - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Apr 2026, Arm Holdings plc American Depositary Shares reported a net income of 223.00M and revenue of 1.24B, resulting in a net margin of 18.0%.