AWK vs. NGG

Last updated Jun 4, 2026

AWK (American Water Works Company, Inc.) and NGG (National Grid plc) are both stocks. Both are in the Utilities sector — AWK in Utilities - Regulated Water, NGG in Utilities - Regulated Electric. Over the past 10 years, AWK returned 7.02%/yr vs 6.97%/yr for NGG. At a 0.42 correlation, their price movements are largely independent.

Performance

AWK vs. NGG - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Water Works Company, Inc. (AWK) and National Grid plc (NGG). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, AWK achieves a -3.80% return, which is significantly lower than NGG's 6.45% return. Both investments have delivered pretty close results over the past 10 years, with AWK having a 7.02% annualized return and NGG not far behind at 6.97%.

AWK

• 1D: 0.11%
• 1M: -1.70%
• YTD: -3.80%
• 6M: -4.15%
• 1Y: -10.43%
• 3Y*: -3.02%
• 5Y*: -2.55%
• 10Y*: 7.02%

NGG

• 1D: -0.51%
• 1M: -5.90%
• YTD: 6.45%
• 6M: 7.65%
• 1Y: 17.08%
• 3Y*: 14.04%
• 5Y*: 10.93%
• 10Y*: 6.97%

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

AWK vs. NGG - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
AWK American Water Works Company, Inc.	-3.80%	7.40%	-3.53%	-11.68%	-17.89%	24.83%	26.88%	37.79%	1.32%	29.01%
NGG National Grid plc	6.45%	35.88%	-1.26%	18.82%	-12.68%	29.02%	-0.75%	38.53%	-13.76%	4.94%

Correlation

The correlation between AWK and NGG is 0.34, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.34
Correlation (3Y) Calculated over the trailing 3-year period	0.46
Correlation (5Y) Calculated over the trailing 5-year period	0.47
Correlation (10Y) Calculated over the trailing 10-year period	0.47
Correlation (All Time) Calculated using the full available price history since Apr 24, 2008	0.42

The correlation between AWK and NGG shifts across timeframes, from 0.34 (1 year) to 0.47 (10 years), reflecting how their relationship changes across market environments.

Fundamentals

Market Cap AWK : $24.14B NGG : $79.84B
EPS AWK : $5.65 NGG : $6.16
PE Ratio AWK : 21.91 NGG : 13.03
PS Ratio AWK : 4.64 NGG : 2.23
PB Ratio AWK : 2.19 NGG : 2.03
Total Revenue (TTM) AWK : $5.21B NGG : $35.68B
Gross Profit (TTM) AWK : $2.27B NGG : $10.47B
EBITDA (TTM) AWK : $2.48B NGG : $15.03B

Return for Risk

AWK vs. NGG — Risk / Return Rank

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

AWK

AWK Risk / Return Rank: 17
AWK Sharpe Ratio Rank: 19
AWK Sortino Ratio Rank: 18
AWK Omega Ratio Rank: 19
AWK Calmar Ratio Rank: 16
AWK Martin Ratio Rank: 11

NGG

NGG Risk / Return Rank: 63
NGG Sharpe Ratio Rank: 66
NGG Sortino Ratio Rank: 57
NGG Omega Ratio Rank: 59
NGG Calmar Ratio Rank: 64
NGG Martin Ratio Rank: 69

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.

AWK vs. NGG - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Water Works Company, Inc. (AWK) and National Grid plc (NGG). 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.

	AWK	NGG	Difference
Sharpe ratio: Return per unit of total volatility	-0.49	0.80	-1.29
Sortino ratio: Return per unit of downside risk	-0.58	1.15	-1.72
Omega ratio: Gain probability vs. loss probability	0.94	1.16	-0.23
Calmar ratio: Return relative to maximum drawdown	-0.68	1.21	-1.89
Martin ratio: Return relative to average drawdown	-1.29	3.53	-4.82
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

AWK vs. NGG - Sharpe Ratio Comparison

The current AWK Sharpe Ratio is -0.49, which is lower than the NGG Sharpe Ratio of 0.80. The chart below compares the historical Sharpe Ratios of AWK and NGG, 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

	AWK	NGG	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.49	0.80	-1.29
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.11	0.50	-0.61
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.30	0.30	-0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.57	0.36	+0.21

Drawdowns

AWK vs. NGG - Drawdown Comparison

The maximum AWK drawdown since its inception was -37.10%, smaller than the maximum NGG drawdown of -54.85%. Use the drawdown chart below to compare losses from any high point for AWK and NGG.

Drawdown Indicators

	AWK	NGG	Difference
Max Drawdown Largest peak-to-trough decline	-37.10%	-54.85%	+17.75%
Max Drawdown (1Y) Largest decline over 1 year	-15.45%	-14.15%	-1.30%
Max Drawdown (3Y) Largest decline over 3 years	-22.33%	-20.76%	-1.57%
Max Drawdown (5Y) Largest decline over 5 years	-37.10%	-39.20%	+2.10%
Max Drawdown (10Y) Largest decline over 10 years	-37.10%	-39.20%	+2.10%
Current Drawdown Current decline from peak	-27.72%	-12.34%	-15.38%
Average Drawdown Average peak-to-trough decline	-9.48%	-13.41%	+3.93%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.09%	4.85%	+3.24%

Volatility

AWK vs. NGG - Volatility Comparison

The current volatility for American Water Works Company, Inc. (AWK) is 5.10%, while National Grid plc (NGG) has a volatility of 10.45%. This indicates that AWK experiences smaller price fluctuations and is considered to be less risky than NGG based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	AWK	NGG	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.10%	10.45%	-5.35%
Volatility (6M) Calculated over the trailing 6-month period	15.21%	17.16%	-1.95%
Volatility (1Y) Calculated over the trailing 1-year period	21.30%	21.43%	-0.13%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.87%	22.07%	+0.80%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	23.69%	23.10%	+0.59%

Dividends

AWK vs. NGG - Dividend Comparison

AWK's dividend yield for the trailing twelve months is around 2.73%, less than NGG's 4.04% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AWK American Water Works Company, Inc.	2.73%	2.49%	2.41%	2.10%	1.68%	1.25%	1.40%	1.59%	1.96%	1.77%	2.02%	2.23%
NGG National Grid plc	4.04%	4.03%	11.81%	5.20%	5.18%	4.75%	5.32%	4.94%	6.51%	14.95%	5.07%	4.73%

Financials

AWK vs. NGG - Profitability Comparison

The chart below illustrates the profitability comparison between American Water Works Company, Inc. and National Grid plc over time, highlighting three key metrics: Gross Profit Margin, Operating Margin, and Net Profit Margin.

AWK - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, American Water Works Company, Inc. reported a gross profit of 714.00M and revenue of 1.21B. Therefore, the gross margin over that period was 59.2%.

NGG - Gross Margin

Gross margin is calculated as gross profit divided by revenue. For the three months ending on Jun 2026, National Grid plc reported a gross profit of 4.21B and revenue of 10.78B. Therefore, the gross margin over that period was 39.0%.

AWK - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, American Water Works Company, Inc. reported an operating income of 391.00M and revenue of 1.21B, resulting in an operating margin of 32.4%.

NGG - Operating Margin

Operating margin is calculated as operating income divided by revenue. For the three months ending on Jun 2026, National Grid plc reported an operating income of 4.21B and revenue of 10.78B, resulting in an operating margin of 39.0%.

AWK - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, American Water Works Company, Inc. reported a net income of 196.00M and revenue of 1.21B, resulting in a net margin of 16.2%.

NGG - Net Margin

Net margin is calculated as net income divided by revenue. For the three months ending on Jun 2026, National Grid plc reported a net income of 2.66B and revenue of 10.78B, resulting in a net margin of 24.7%.

Frequently Asked Questions

Can I hold both AWK and NGG in my portfolio?

AWK and NGG have a correlation of 0.34, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, AWK or NGG?

NGG has higher volatility (10.45%) compared to AWK (5.10%). In terms of maximum drawdown, AWK dropped -37.10% vs NGG's -54.85%.

Which has better risk-adjusted returns?

NGG currently has the higher Sharpe Ratio (0.80 vs -0.49), 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.