American Electric Power vs Constellation Energy
Prices at close . Model readings .
American Electric Power
$128.20−1.61%- Market value
- $70.13B
- P/E
- 17.8
- 1 year
- +13.6%
Constellation Energy
$258.08−0.35%- Market value
- $92.91B
- P/E
- 44.9
- 1 year
- −33.7%
Price change, with the S&P 500 as a benchmark
Percent change in each close since the start of the chosen range, for both companies and the S&P 500 (SPY). Daily closes over the last year, weekly before that and monthly before five years.
How the two compare
On the latest closes (28 Oct 2026), Constellation Energy is the larger company by market value ($92.91B against $70.13B). Over the past year American Electric Power returned +13.6% and Constellation Energy −33.7%, while the S&P 500 returned +12.7%. The latest filed P/E is 17.8 for American Electric Power and 44.9 for Constellation Energy, and the operating margin 22.6% against 7.7%. Over the next 21 sessions the model expects −0.53% for American Electric Power, with a 35% chance of a rise, and −0.61% for Constellation Energy, with a 43% chance. American Electric Power has no published fair value today. Constellation Energy's long-run fair value is $252.64, a gap of −2.1% to its price; the long-run model view is neutral.
What the model expects
Expected returns and the chance of a rise from our forecasting models, and the long-run fair value against the price. Readings, not advice.
How the prices moved
Price change over each period, with the S&P 500 (SPY) for comparison.
What the market pays
Size and the multiples from the latest filed quarter. A P/E on losses reads n/m.
How much of revenue becomes profit
Margins and returns on capital from the latest filing; revenue, net income and earnings per share over the trailing twelve months.
How fast the business grew
Change against the same quarter a year earlier.
Balance sheet and quality scores
Leverage, liquidity and two published scores: Altman Z (below 1.8 the distress zone, above 3 the safe zone) and Piotroski F (0 to 9).
How the shares trade
Volatility, sensitivity to the market, the deepest fall, short interest and how closely the two move together.
American Electric Power or Constellation Energy: common questions
Which is larger by market value, American Electric Power or Constellation Energy?
Constellation Energy, at $92.91B against $70.13B for American Electric Power, on the latest closes (28 Oct 2026).
Which has the higher P/E ratio, American Electric Power or Constellation Energy?
Constellation Energy has the higher latest filed P/E, 44.9; American Electric Power's is 17.8. Filings: quarter to 30 Sep 2026 and 30 Jun 2026.
How did American Electric Power and Constellation Energy move over the past year against the S&P 500?
Over the past year American Electric Power returned +13.6% and Constellation Energy −33.7%, while the S&P 500 returned +12.7%. Prices at close 28 Oct 2026.
What does the model expect for American Electric Power and Constellation Energy over the next month?
−0.53% for American Electric Power with a 35% chance of a rise, and −0.61% for Constellation Energy with a 43% chance, over the next 21 sessions. Model readings 28 Oct 2026. These are model readings, not advice.
How do the operating margins of American Electric Power and Constellation Energy compare?
The operating margin is 22.6% for American Electric Power and 7.7% for Constellation Energy, and the gross margin 22.6% against 7.7%. Filings: quarter to 30 Sep 2026 and 30 Jun 2026.
Do American Electric Power and Constellation Energy shares move together?
Over the past year the correlation of their daily returns was 0.25 (loosely together); 1 means they always move together, 0 unrelated, −1 opposite. Prices at close 28 Oct 2026.
Model readings are research estimates, not investment advice. Prices: daily closes. Fundamentals: the latest SEC filings. Short interest: FINRA, settlement 30 Sep 2026. A dash means the figure is not in our data; it is never shown as zero. The model view follows a published rule: next month by the sign of the expected return, the long run positive at a fair value 10% or more above the price and negative at 10% or more below it.