Sifting through countless of stocks in the Multi-Utilities industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in Sempra or Ameren Corporation because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how Sempra and Ameren Corporation compare based on key financial metrics to determine which better meets your investment needs.

About Sempra and Ameren Corporation

Sempra engages in the regulated utilities business in the United States and Mexico. It operates through three segments: Sempra California, Sempra Texas Utilities, and Sempra Infrastructure. It also invests in and operates electric and gas utilities and other energy infrastructure that provides energy services to customers. The Sempra California segment provides natural gas and electric services to Southern California and part of central California. As of December 31, 2025, it offered electric services to approximately 3.6 million population and natural gas services to approximately 3.3 million population that covers 4,100 square miles. This segment owns and operates a natural gas distribution, transmission, and storage system that supplies natural gas. As of December 31, 2025, it served a population of 21.3 million covering an area of 24,000 square miles. The Sempra Texas Utilities segment engages in the regulated electricity transmission and distribution utility business. As of December 31, 2025, transmission system included approximately 18,418 circuit miles of transmission lines; 1,333 transmission and distribution substations; interconnection to 230 third-party generation facilities totaling 63,670 MW; and distribution system included more than 4.1 million points of delivery and consisted of 127,398 circuit miles of overhead and underground lines. The Sempra Infrastructure segment develops, constructs, operates, and invests in energy infrastructure to help enable the access to cleaner energy in markets in the United States, Mexico, and internationally. The company was formerly known as Sempra Energy and changed its name to Sempra in May 2023. Sempra was incorporated in 1996 and is headquartered in San Diego, California.

Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. The company operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. It engages in the rate-regulated electric generation, transmission, and distribution business and natural gas transmission and distribution business. The company also generates electricity through coal, nuclear, and natural gas, as well as renewable energy, including hydroelectric, wind, methane gas, and solar energy centers. It serves residential, commercial, and industrial customers. Ameren Corporation was founded in 1881 and is headquartered in Saint Louis, Missouri.

Latest Multi-Utilities and Sempra, Ameren Corporation Stock News

As of September 4, 2026, Sempra had a $55.0 billion market capitalization, compared to the Multi-Utilities median of $26.1 million. Sempra’s stock is down 4.8% in 2026, down 0.3% in the previous five trading days and up 2.34% in the past year.

Currently, Sempra’s price-earnings ratio is 24.3. Sempra’s trailing 12-month revenue is $13.6 billion with a 16.8% net profit margin. Year-over-year quarterly sales growth most recently was -0.1%. Analysts expect adjusted earnings to reach $5.106 per share for the current fiscal year. Sempra currently has a 3.1% dividend yield.

As of September 4, 2026, Ameren Corporation had a $29.5 billion market cap, putting it in the 89th percentile of all stocks. Ameren Corporation’s stock is up 6.6% in 2026, up 0.3% in the previous five trading days and up 5.54% in the past year.

Currently, Ameren Corporation’s price-earnings ratio is 18.8. Ameren Corporation’s trailing 12-month revenue is $8.4 billion with a 18.6% net profit margin. Year-over-year quarterly sales growth most recently was -6.2%. Analysts expect adjusted earnings to reach $5.389 per share for the current fiscal year. Ameren Corporation currently has a 2.8% dividend yield.

How We Compare Sempra and Ameren Corporation Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at Sempra and Ameren Corporation’s stock grades to see how they measure up against one another.

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Sempra and Ameren Corporation Stock Value Grades

Company	Ticker	Value
Sempra	SRE	C
Ameren Corporation	AEE	C

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection.

Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

AAII’s A+ Investor Value Grade derives from a stock’s value score. The Value Score is the percentile rank of the average of the percentile ranks of the price-to-sales ratio, price-earnings ratio, enterprise-value-to-EBITDA (EV/EBITDA) ratio, shareholder yield, price-to-book-value ratio and price-to-free-cash-flow ratio. The score is variable, meaning it can consider all six ratios or, should any of the six ratios not be valid, the remaining ratios that are valid. To be assigned a Value Score, stocks must have a valid (non-null) ratio and corresponding ranking for at least two of the six valuation ratios.

Stocks with a Value Score from 81 to 100 are considered deep value, those with a score between 61 and 80 are a good value and so on.

Sempra has a Value Score of 43, which is Average. Ameren Corporation has a Value Score of 44, which is Average.

The Value Stock Winner: No Clear Winner

Neither Sempra or Ameren Corporation has a high enough value grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolio. It’s important to look at a wide range of financial metrics in order to determine if Sempra or Ameren Corporation is the better investment when it comes to value.

Sempra and Ameren Corporation Growth Grades

Company	Ticker	Growth
Sempra	SRE	B
Ameren Corporation	AEE	A

The foundation of growth investing is seeking out stocks of companies exhibiting strong, consistent and prolonged growth that is expected to continue into the future.

In order to compute the growth score and assign it a letter grade, the percentile ranks for each of three components‐consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations‐must be determined. These three rank figures are added together, and the sum is ranked against the entire stock universe to arrive at a company’s Growth Score to create an equal distribution of grades.

The companies in the bottom 20% of the stock universe receive Growth Grades of F, considered to be very weak, while those in the top 20% receive A grades, which are considered very strong.

Sempra has a Growth Score of 73, which is Strong. Ameren Corporation has a Growth Score of 95, which is Very Strong.

The Growth Grade Winner: Ameren Corporation

As you can clearly see from the Growth Grade breakdown above, Ameren Corporation has a more attractive growth grade than Sempra. For investors who focus solely on how a company is growing relative to other companies in the same industry, Ameren Corporation could be a good stock to add to their portfolio. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Sempra and Ameren Corporation’s Momentum Grades

Company	Ticker	Momentum
Sempra	SRE	D
Ameren Corporation	AEE	C

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

Sempra has a Momentum Score of 37, which is Weak. Ameren Corporation has a Momentum Score of 42, which is Average.

The Momentum Stock Winner: No Clear Winner

Neither Sempra or Ameren Corporation has a strong enough Momentum Grade to be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if Sempra or Ameren Corporation is the better investment when it comes to momentum.

Other Sempra and Ameren Corporation Grades

In addition to Growth, Value and Momentum, A+ Investor also provides grades for Estimate Revisions and Quality.

Earnings estimate revisions scores take into account the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, surprises beget further surprises‐or at least continued sales growth (the exact opposite is generally true, too).

AAII’s A+ Investor Quality Grade comes from the ranking of key metrics. Specifically, the quality grade is the percentile rank of the composite of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and F-Score.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether Sempra and Ameren Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Sempra or Ameren Corporation Stock?

Overall, Sempra stock has a Value Score of 43, Growth Score of 73 and Momentum Score of 37.

Ameren Corporation stock has a Value Score of 44, Growth Score of 95 and Momentum Score of 42.

Comparing Sempra and Ameren Corporation’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.