NGG vs SO vs DUK Stock Comparison

National Grid, Southern and Duke Energy Prices as of Oct 23, 2026 Peers: Industry group
NGG National Grid Plc
$81.87 +8.8% 1M +6.7% 1Y
Market cap
$80.86B
P/E
18.6x
Revenue (TTM)
—
Div. yield
–
Regulated Electric Utilities Utilities
4 wins
SO Southern Co
$92.89 +11.3% 1M -3.4% 1Y
Market cap
$105.25B
P/E
22.6x
Revenue (TTM)
$30.18B
Div. yield
0.03%
Regulated Electric Utilities Utilities
3 wins
DUK Duke Energy CORP
$124.97 +9.4% 1M -1.8% 1Y
Market cap
$96.91B
P/E
19.1x
Revenue (TTM)
$33.17B
Div. yield
0.03%
Regulated Electric Utilities Utilities
5 wins

Head to Head

12 decided of 12

Duke Energy leads on 5 of the 12 questions below (Duke Energy 5, National Grid 4, Southern 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionNGGSODUKLeader
Larger companyMarket capitalisation $80.86B $105.25B $96.91B SO
Cheaper on earningsLower P/E, profitable companies only 18.6x 22.6x 19.1x NGG
Cheaper on forward earningsLower price / next fiscal year consensus EPS 14.0x 19.2x 19.1x NGG
Faster revenue growthRevenue growth, trailing twelve months — +6.4% +7.2% DUK
More profitableNet margin, trailing twelve months — 15.4% 15.3% SO
Better return on capitalReturn on invested capital — 5.1% 5.4% DUK
Less leveragedLower net debt / EBITDA — 5.3x 5.2x DUK
Higher dividend yieldTrailing dividend yield 0.00% 0.03% 0.03% DUK
Better 1-year returnPrice return, last 12 months +6.7% -3.4% -1.8% NGG
Better 5-year returnAnnualised price return, 5 years +5.4%/yr +8.1%/yr +3.8%/yr SO
Less volatileAnnualised volatility, 1 year 22.4% 17.9% 16.6% DUK
Higher overall scoreMean of the five percentile scores vs peers 73/100 43/100 56/100 NGG

Percentile Scorecard

NGGSODUK

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisNGGSODUK
Valuation 52 #33 of 67 33 #45 of 67 70 #21 of 67
Growth – 55 #30 of 65 75 #17 of 65
Profitability – 75 #17 of 65 80 #14 of 65
Financial Health 79 #15 of 66 37 #42 of 66 35 #43 of 66
Shareholder Returns 89 #8 of 67 15 #57 of 67 23 #52 of 67
Overall 73 43 56
  • NGG ranked among 67 companies in Regulated Utilities
  • SO ranked among 67 companies in Regulated Utilities
  • DUK ranked among 67 companies in Regulated Utilities

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodNGGSODUKSPY
1 month +8.8%+11.3%+9.4% -1.0%
3 months -0.5%-4.5%-4.3% +2.9%
6 months -6.3%-0.6%-1.8% +6.4%
Year to date +5.8%+6.5%+6.6% +11.4%
1 year +6.7%-3.4%-1.8% +13.1%
3 years +37.0%+39.8%+42.4% +79.4%
3 years, per year +11.1%+11.8%+12.5% +21.5%
5 years +30.3%+47.6%+20.4% +67.7%
5 years, per year +5.4%+8.1%+3.8% +10.9%
10 years +14.7%+83.8%+60.2% +255.2%
10 years, per year +1.4%+6.3%+4.8% +13.5%

Risk

MeasureNGGSODUKSPY
Volatility, 1Y 22.4%17.9%16.6% 12.7%
Downside volatility, 1Y 24.3%17.5%17.0% 12.7%
Beta vs S&P 500, 1Y 0.31-0.23-0.31 1.00
Return / volatility, 1Y 0.30-0.19-0.11 1.03
Max drawdown, 5Y -40.9%-23.3%-26.0% -25.4%
From 52-week high -12.8%-6.3%-6.4% -2.5%
52-week high $93.93$99.11$133.46 $779.14
52-week low $73.54$82.35$113.24 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleNGGSODUK
P/E now vs peer median 18.6xmedian 20.8x 22.7xmedian 20.8x 19.1xmedian 20.8x
P/S now vs peer median 3.6xmedian 2.8x 3.5xmedian 2.8x 2.9xmedian 2.8x
EV/EBITDA now vs peer median —median 13.1x 13.1xmedian 13.1x 11.0xmedian 13.1x
P/FCF now vs peer median -29.4xmedian 36.7x -32.7xmedian 36.7x -29.5xmedian 36.7x
P/B now vs peer median 1.6xmedian 1.7x 2.5xmedian 1.7x 1.7xmedian 1.7x
PEG now vs peer median —median 2.27 0.71median 2.27 0.68median 2.27

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsNGGSODUK
Revenue – $30.18B $33.17B
Gross profit – $25.14B $24.71B
Operating income – $7.31B $9.01B
Net income – $4.66B $5.24B
Free cash flow – -$3.27B -$3.30B
EPS (diluted) – $4.08 $6.53
Cash & equivalents $493.98M $2.98B $2.14B
Total debt $61.59B $295.00B $352.76B
Shares (diluted) 994.20M 1.14B 779.00M
Enterprise value $53.16B $96.30B $93.49B

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricNGGSODUK
P/E 18.6x 22.7x 19.1x
P/FCF -29.4x -32.7x -29.5x
P/Operating cash flow – 10.0x 8.3x
P/S 3.6x 3.5x 2.9x
P/B 1.6x 2.5x 1.7x
P/Tangible book 1.8x 2.5x 1.7x
EV/EBITDA – 13.1x 11.0x
EV/EBIT – 24.6x 20.6x
EV/Revenue – 5.9x 5.6x
EV/FCF – -54.9x -56.2x
EV/Operating cash flow – 16.8x 15.9x
PEG (3Y EPS CAGR) – 0.71 0.68

Growth

14 metrics
MetricNGGSODUK
Revenue growth (1Y) – 6.4% 7.2%
Revenue CAGR (3Y) – 3.0% 4.5%
Gross profit growth (1Y) – 5.3% 12.9%
Gross profit CAGR (3Y) – 1.6% 8.0%
Operating income growth (1Y) – 1.5% 8.5%
Operating income CAGR (3Y) – 14.7% 12.2%
Net income growth (1Y) – 8.7% 7.7%
Net income CAGR (3Y) – 16.2% 29.1%
EPS growth (1Y) – 5.6% 8.6%
EPS CAGR (3Y) – 31.9% 28.1%
Operating cash flow growth (1Y) – 15.5% -3.0%
Operating cash flow CAGR (3Y) – 23.7% 27.6%
Free cash flow growth (1Y) – -152.2% -1,646%
Free cash flow CAGR (3Y) – -3.1% 19.6%

Profitability

14 metrics
MetricNGGSODUK
Gross margin – 83.3% 74.5%
EBITDA margin – 45.2% 51.0%
Operating margin – 24.2% 27.2%
Pretax margin – 17.4% 18.1%
Net margin – 15.4% 15.3%
FCF margin – -10.8% -9.9%
Operating cash flow margin – 35.3% 35.2%
Return on equity – 9.2% 9.6%
Return on assets – 2.9% 2.7%
Return on invested capital – 5.1% 5.4%
Return on capital employed – 5.1% 5.1%
Asset turnover – 0.2x 0.2x
Cash conversion (OCF / net income) – 2.3x 2.2x
Stock comp / revenue – – –

Financial Health

11 metrics
MetricNGGSODUK
Debt / assets 43.2% 46.6% 45.6%
Debt / equity 1.2x 1.8x 1.6x
Net debt / EBITDA – 5.3x 5.2x
Debt / FCF – -23.1x -27.4x
Liabilities / assets 63.7% 73.9% 71.5%
Equity / assets 36.3% 26.1% 28.5%
Interest coverage – 2.3x 2.4x
Current ratio 0.8x 0.8x 0.7x
Quick ratio 0.7x 0.4x 0.3x
Cash ratio 0.3x 0.2x 0.1x
Altman Z-score – – 0.73

Shareholder Returns

7 metrics
MetricNGGSODUK
Dividend yield 4.0% 3.2% 3.4%
Net buyback yield – – –
Shareholder yield 4.0% 3.2% 3.4%
Payout ratio (earnings) – 66.6% 63.7%
Payout ratio (FCF) – -94.8% -101.3%
Dividend growth (1Y) – 4.7% 4.1%
Dividend CAGR (3Y) – 1.2% 1.5%

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusNGGSODUK
Forward P/E 14.0xFY2026 19.2xFY2026 19.1xFY2026
EPS, next fiscal year $5.84FY2026 $4.84FY2026 $6.56FY2026
EPS growth, next FY +11.0%FY2026 +12.6%FY2026 +4.0%FY2026
EPS growth, the year after +9.2% -2.9% +15.4%
Revenue, next fiscal year $25.23BFY2026 $31.53BFY2026 $32.40BFY2026
Revenue growth, next FY +5.8%FY2026 +6.7%FY2026 +0.5%FY2026
Revenue growth, the year after +8.0% +8.8% +4.1%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersNGGSODUK
Held by institutions 6.2% 72.5% 69.7%
Institutions holding 617 2,363 2,457
Change in shares held, QoQ +6.6% +5.7% +0.5%
Institutions buying 352 1,248 1,297
Institutions selling 159 724 801
Buyers to sellers 2.21 1.72 1.62

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

NGGSODUK
NGG 1.00 0.51 0.55
SO 0.51 1.00 0.86
DUK 0.55 0.86 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, NGG, SO and DUK?

Southern (SO) is the largest by market capitalisation: National Grid (NGG) $80.86B, Southern (SO) $105.25B, Duke Energy (DUK) $96.91B.

Which stock is cheaper, NGG, SO and DUK?

National Grid (NGG) trades on the lowest price-to-earnings ratio (National Grid (NGG) 18.6x, Southern (SO) 22.6x, Duke Energy (DUK) 19.1x). On next year's consensus earnings, National Grid (NGG) is cheapest (National Grid (NGG) 14.0x, Southern (SO) 19.2x, Duke Energy (DUK) 19.1x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Duke Energy (DUK) grew revenue fastest over the trailing twelve months: Southern (SO) +6.4%, Duke Energy (DUK) +7.2%.

Which company is more profitable?

Southern (SO) has the highest net margin (Southern (SO) 15.4%, Duke Energy (DUK) 15.3%). On return on invested capital, Duke Energy (DUK) leads (Southern (SO) 5.1%, Duke Energy (DUK) 5.4%).

Which stock has performed better?

Over the past year National Grid (NGG) returned the most: National Grid (NGG) +6.7%, Southern (SO) -3.4%, Duke Energy (DUK) -1.8%. Over five years, Southern (SO) compounded fastest (National Grid (NGG) +5.4%/yr, Southern (SO) +8.1%/yr, Duke Energy (DUK) +3.8%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Duke Energy (DUK) has the highest dividend yield: National Grid (NGG) 0.00%, Southern (SO) 0.03%, Duke Energy (DUK) 0.03%. National Grid (NGG) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Duke Energy (DUK) has been the steadiest (National Grid (NGG) 22.4%, Southern (SO) 17.9%, Duke Energy (DUK) 16.6%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, NGG, SO and DUK?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Duke Energy (DUK) leads on 5. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.