Utilities stock comparison
From each company's latest annual SEC filing. Fiscal years can end on different dates.
American Electric Power (AEP) is the larger business by reported revenue: $21.9B in its fiscal year ended Dec 2025, about 4.7× ATO's $4.7B (fiscal year ended Sep 2025). The SEC places them in related industries (Electric Services; Natural Gas Distribution), and both map to the Rates & central banks research theme.
Figures come from each company's own SEC filings. This page compares the businesses; it is not a price target or a verdict.
| Company fact | AEP | ATO |
|---|---|---|
| Company | American Electric Power Company, Inc. | Atmos Energy Corporation |
| Exchange | NASDAQ | NYSE |
| Headquarters | Columbus, Ohio | — |
| Founded | 1906 | — |
| SEC industry | Electric Services | Natural Gas Distribution |
| Fiscal year-end | December 31 | September 30 |
| Latest annual filing | 10-K · 2026-02-12 | 10-K · 2025-11-14 |
| Metric | AEP | ATO |
|---|---|---|
| Revenue | $21.9B2025-01-01 to 2025-12-31 · SEC filing | $4.7B2024-10-01 to 2025-09-30 · SEC filing |
| Net income | — | $1.2B2024-10-01 to 2025-09-30 · SEC filing |
| Operating cash flow | $6.9B2025-01-01 to 2025-12-31 · SEC filing | $2.0B2024-10-01 to 2025-09-30 · SEC filing |
| Diluted EPS | $6.662025-01-01 to 2025-12-31 · SEC filing | $7.462024-10-01 to 2025-09-30 · SEC filing |
| Net margin | — | 25.5%2024-10-01 to 2025-09-30 · SEC filing |
AEP: FY ending 2025-12-31 · ATO: FY ending 2025-09-30. Figures as tagged in each issuer's SEC XBRL filing; fiscal calendars may not align.
Overlap is drawn from SEC classifications and Yield Theory research themes. It is not evidence that the companies sell to the same customers or compete product for product.
American Electric Power owns one of the largest electricity transmission networks in the United States and serves customers across eleven states. Much of its growth plan centers on expanding and modernizing the grid.
Atmos Energy is one of the largest US natural-gas distributors, serving customers across several states.
Company-specific drivers maintained by Yield Theory. Use them to decide which filing deserves deeper work; they are not predictions.
We have not yet published a company-specific driver list for AEP. The primary source is Item 1 (Business) and Item 1A (Risk Factors) of its 10-K filed 2026-02-12.
We have not yet published a company-specific driver list for ATO. The primary source is Item 1 (Business) and Item 1A (Risk Factors) of its 10-K filed 2025-11-14.
You now know AEP reports about 4.7× ATO's revenue. Those are the facts. The investment question is what each share price already assumes about their exposure to rates & central banks, and which evidence in the next filings would prove that assumption wrong.
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Read the full researchStart with primary filings because fiscal calendars and accounting presentation can make superficially similar quarters incomparable. AEP's fiscal year ends December 31, while ATO's ends September 30. Normalize the reporting periods before comparing growth, margins, capital intensity, or guidance.
The current verified House and Senate snapshot contains 12 matched transaction rows for AEP and 5 matched transaction rows for ATO. These delayed, range-based disclosures can identify a filing to inspect; they do not establish motive, conviction, or a real-time trading signal.
This page does not contain licensed live prices, a valuation model, earnings estimates, portfolio constraints, or a forecast of future returns. SEC classifications can be broad, company descriptions can lag strategic change, and the latest annual filing may predate a material acquisition or divestiture. Read subsequent quarterly and current reports before making a decision.
A stronger business is not automatically the better stock. Starting valuation, expectations, capital structure, cyclicality, dilution, and the probability of each thesis determine the investment outcome. Use this comparison to frame the work, then verify the numbers in the linked filings and current company disclosures.
Not necessarily. American Electric Power files as Electric Services and Atmos Energy as Natural Gas Distribution. The pair is compared because both map to the Rates & central banks research theme, not because the filings show head-to-head competition.
American Electric Power (AEP) is the larger business by reported revenue: $21.9B in its fiscal year ended Dec 2025, about 4.7× ATO's $4.7B (fiscal year ended Sep 2025). The SEC places them in related industries (Electric Services; Natural Gas Distribution), and both map to the Rates & central banks research theme. Each figure is the annual amount tagged in the company's own SEC XBRL filing; market value depends on live prices, which this page does not publish.
There is no context-free winner. Compare the operating exposures, filing evidence, valuation, balance sheet, and risks against the specific thesis you are testing. This page deliberately does not turn a static profile into a buy or sell recommendation.
No. Yield Theory does not republish unlicensed real-time market data. The financial figures on this page are the audited annual numbers American Electric Power Company, Inc. and Atmos Energy Corporation tagged in their SEC XBRL filings. Use a regulated broker or licensed quote provider for current prices and valuation multiples.
Company classifications, fiscal year-ends, and filing links come from the SEC EDGAR submissions API snapshot refreshed 2026-10-03. Business summaries and research themes are maintained by Yield Theory.
Data snapshot: SEC EDGAR submissions API, refreshed 2026-10-03. Independent educational research; not investment advice.
AEP vs ATO compares reported results. The reports below show how we connect operating evidence to an investment thesis, its assumptions, catalysts, and risks. $39/month or $249/year.
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