AEP vs NGG vs SO Stock Comparison

American Electric Power, National Grid and Southern Prices as of Oct 26, 2026 Peers: Industry group
NGG National Grid Plc
$81.77 +8.4% 1M +6.3% 1Y
Market cap
$80.91B
P/E
18.6x
Revenue (TTM)
—
Div. yield
–
Regulated Electric Utilities Utilities
3 wins
SO Southern Co
$92.56 +11.7% 1M -3.5% 1Y
Market cap
$105.29B
P/E
22.6x
Revenue (TTM)
$30.18B
Div. yield
0.03%
Regulated Electric Utilities Utilities
4 wins

Head to Head

11 decided of 12

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

QuestionAEPNGGSOLeader
Larger companyMarket capitalisation $70.85B $80.91B $105.29B SO
Cheaper on earningsLower P/E, profitable companies only 25.7x 18.6x 22.6x NGG
Cheaper on forward earningsLower price / next fiscal year consensus EPS 21.5x 14.0x 19.1x NGG
Faster revenue growthRevenue growth, trailing twelve months +10.3% — +6.4% AEP
More profitableNet margin, trailing twelve months 12.1% — 15.4% SO
Better return on capitalReturn on invested capital 5.5% — 5.1% AEP
Less leveragedLower net debt / EBITDA 6.0x — 5.3x SO
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.03% –
Better 1-year returnPrice return, last 12 months +11.4% +6.3% -3.5% AEP
Better 5-year returnAnnualised price return, 5 years +8.9%/yr +5.0%/yr +8.1%/yr AEP
Less volatileAnnualised volatility, 1 year 19.4% 22.5% 17.9% SO
Higher overall scoreMean of the five percentile scores vs peers 41/100 73/100 43/100 NGG

Percentile Scorecard

AEPNGGSO

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

AxisAEPNGGSO
Valuation 23 #52 of 67 55 #31 of 67 36 #43 of 67
Growth 64 #24 of 65 – 53 #31 of 65
Profitability 59 #27 of 64 – 78 #15 of 64
Financial Health 29 #46 of 64 76 #16 of 64 35 #42 of 64
Shareholder Returns 30 #47 of 67 89 #8 of 67 15 #57 of 67
Overall 41 73 43
  • AEP ranked among 67 companies in Regulated Utilities
  • NGG ranked among 67 companies in Regulated Utilities
  • SO ranked among 67 companies in Regulated Utilities

Price Performance

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

Returns

PeriodAEPNGGSOSPY
1 month +9.2%+8.4%+11.7% -0.8%
3 months -3.3%+0.7%-4.1% +3.5%
6 months -4.3%-6.3%-1.3% +7.0%
Year to date +12.1%+5.7%+6.1% +12.2%
1 year +11.4%+6.3%-3.5% +13.0%
3 years +72.5%+36.6%+39.1% +86.3%
3 years, per year +19.9%+11.0%+11.6% +23.1%
5 years +53.3%+27.6%+47.8% +68.6%
5 years, per year +8.9%+5.0%+8.1% +11.0%
10 years +103.4%+15.9%+81.6% +258.0%
10 years, per year +7.4%+1.5%+6.1% +13.6%

Risk

MeasureAEPNGGSOSPY
Volatility, 1Y 19.4%22.5%17.9% 12.7%
Downside volatility, 1Y 19.2%24.2%17.5% 12.7%
Beta vs S&P 500, 1Y -0.070.31-0.23 1.00
Return / volatility, 1Y 0.590.28-0.19 1.02
Max drawdown, 5Y -32.2%-40.9%-23.3% -25.4%
From 52-week high -6.8%-12.9%-6.6% -1.8%
52-week high $138.69$93.93$99.11 $779.14
52-week low $113.70$73.54$82.35 $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.

MultipleAEPNGGSO
P/E now vs peer median 25.5xmedian 20.8x 18.6xmedian 20.8x 22.6xmedian 20.8x
P/S now vs peer median 3.1xmedian 2.9x 3.6xmedian 2.9x 3.5xmedian 2.9x
EV/EBITDA now vs peer median 14.0xmedian 13.1x —median 13.1x 13.1xmedian 13.1x
P/FCF now vs peer median -12.2xmedian 36.7x -29.4xmedian 36.7x -32.6xmedian 36.7x
P/B now vs peer median 2.1xmedian 1.7x 1.6xmedian 1.7x 2.5xmedian 1.7x
PEG now vs peer median 2.76median 2.23 —median 2.23 0.71median 2.23

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 monthsAEPNGGSO
Revenue $22.79B – $30.18B
Gross profit $15.43B – $25.14B
Operating income $5.24B – $7.31B
Net income $3.07B – $4.66B
Free cash flow -$5.75B – -$3.27B
EPS (diluted) $5.02 – $4.08
Cash & equivalents $375.00M $493.98M $2.98B
Total debt $52.84B $61.59B $295.00B
Shares (diluted) 550.63M 994.20M 1.14B
Enterprise value $68.02B $53.20B $96.35B

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
MetricAEPNGGSO
P/E 25.5x 18.6x 22.6x
P/FCF -12.2x -29.4x -32.6x
P/Operating cash flow 9.1x – 10.0x
P/S 3.1x 3.6x 3.5x
P/B 2.1x 1.6x 2.5x
P/Tangible book 2.1x 1.8x 2.5x
EV/EBITDA 14.0x – 13.1x
EV/EBIT 23.4x – 24.5x
EV/Revenue 5.4x – 5.9x
EV/FCF -21.3x – -54.8x
EV/Operating cash flow 15.9x – 16.8x
PEG (3Y EPS CAGR) 2.76 – 0.71

Growth

14 metrics
MetricAEPNGGSO
Revenue growth (1Y) 10.3% – 6.4%
Revenue CAGR (3Y) 5.4% – 3.0%
Gross profit growth (1Y) 8.1% – 5.3%
Gross profit CAGR (3Y) 7.8% – 1.6%
Operating income growth (1Y) 2.2% – 1.5%
Operating income CAGR (3Y) 19.5% – 14.7%
Net income growth (1Y) -17.4% – 8.7%
Net income CAGR (3Y) 15.7% – 16.2%
EPS growth (1Y) 5.2% – 5.6%
EPS CAGR (3Y) 9.2% – 31.9%
Operating cash flow growth (1Y) 17.1% – 15.5%
Operating cash flow CAGR (3Y) 22.6% – 23.7%
Free cash flow growth (1Y) -63.5% – -152.2%
Free cash flow CAGR (3Y) -19.1% – -3.1%

Profitability

14 metrics
MetricAEPNGGSO
Gross margin 67.7% – 83.3%
EBITDA margin 38.4% – 45.2%
Operating margin 23.0% – 24.2%
Pretax margin 15.4% – 17.4%
Net margin 12.1% – 15.4%
FCF margin -25.2% – -10.8%
Operating cash flow margin 33.8% – 35.3%
Return on equity 9.6% – 9.2%
Return on assets 2.7% – 2.9%
Return on invested capital 5.5% – 5.1%
Return on capital employed 5.0% – 5.1%
Asset turnover 0.2x – 0.2x
Cash conversion (OCF / net income) 2.5x – 2.3x
Stock comp / revenue – – –

Financial Health

11 metrics
MetricAEPNGGSO
Debt / assets 43.5% 43.2% 46.6%
Debt / equity 1.6x 1.2x 1.8x
Net debt / EBITDA 6.0x – 5.3x
Debt / FCF -9.2x – -23.1x
Liabilities / assets 72.6% 63.7% 73.9%
Equity / assets 27.4% 36.3% 26.1%
Interest coverage 2.4x – 2.3x
Current ratio 0.5x 0.8x 0.8x
Quick ratio 0.3x 0.7x 0.4x
Cash ratio 0.0x 0.3x 0.2x
Altman Z-score 0.92 – –

Shareholder Returns

7 metrics
MetricAEPNGGSO
Dividend yield 2.9% 4.0% 3.2%
Net buyback yield – – –
Shareholder yield 2.9% 4.0% 3.2%
Payout ratio (earnings) – – 66.6%
Payout ratio (FCF) – – -94.8%
Dividend growth (1Y) – – 4.7%
Dividend CAGR (3Y) – – 1.2%

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.

ConsensusAEPNGGSO
Forward P/E 21.5xFY2026 14.0xFY2026 19.1xFY2026
EPS, next fiscal year $6.01FY2026 $5.86FY2026 $4.84FY2026
EPS growth, next FY +0.7%FY2026 +11.4%FY2026 +12.6%FY2026
EPS growth, the year after +19.0% +8.9% -3.1%
Revenue, next fiscal year $23.09BFY2026 $25.38BFY2026 $31.54BFY2026
Revenue growth, next FY +5.5%FY2026 +6.4%FY2026 +6.7%FY2026
Revenue growth, the year after +3.5% +8.6% +8.8%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAEPNGGSO
Held by institutions 92.1% 6.2% 72.5%
Institutions holding 1,984 617 2,363
Change in shares held, QoQ +13.2% +6.6% +5.7%
Institutions buying 1,064 352 1,248
Institutions selling 584 159 724
Buyers to sellers 1.82 2.21 1.72

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.

AEPNGGSO
AEP 1.00 0.51 0.72
NGG 0.51 1.00 0.51
SO 0.72 0.51 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AEP, NGG and SO?

Southern (SO) is the largest by market capitalisation: American Electric Power (AEP) $70.85B, National Grid (NGG) $80.91B, Southern (SO) $105.29B.

Which stock is cheaper, AEP, NGG and SO?

National Grid (NGG) trades on the lowest price-to-earnings ratio (American Electric Power (AEP) 25.7x, National Grid (NGG) 18.6x, Southern (SO) 22.6x). On next year's consensus earnings, National Grid (NGG) is cheapest (American Electric Power (AEP) 21.5x, National Grid (NGG) 14.0x, Southern (SO) 19.1x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

American Electric Power (AEP) grew revenue fastest over the trailing twelve months: American Electric Power (AEP) +10.3%, Southern (SO) +6.4%.

Which company is more profitable?

Southern (SO) has the highest net margin (American Electric Power (AEP) 12.1%, Southern (SO) 15.4%). On return on invested capital, American Electric Power (AEP) leads (American Electric Power (AEP) 5.5%, Southern (SO) 5.1%).

Which stock has performed better?

Over the past year American Electric Power (AEP) returned the most: American Electric Power (AEP) +11.4%, National Grid (NGG) +6.3%, Southern (SO) -3.5%. Over five years, American Electric Power (AEP) compounded fastest (American Electric Power (AEP) +8.9%/yr, National Grid (NGG) +5.0%/yr, Southern (SO) +8.1%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: American Electric Power (AEP) 0.00%, National Grid (NGG) 0.00%, Southern (SO) 0.03%. American Electric Power (AEP) and National Grid (NGG) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Southern (SO) has been the steadiest (American Electric Power (AEP) 19.4%, National Grid (NGG) 22.5%, Southern (SO) 17.9%). Volatility measures how widely the price swings, not the risk of the business.

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

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Southern (SO) leads on 4. 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.