Sifting through countless of stocks in the Oil, Gas & Consumable Fuels 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 Western Midstream Partners, LP or Cosan S.A. 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 Western Midstream Partners, LP and Cosan S.A. compare based on key financial metrics to determine which better meets your investment needs.

About Western Midstream Partners, LP and Cosan S.A.

Western Midstream Partners, LP, together with its subsidiaries, operates as a midstream energy company primarily in the United States. The company is involved in gathering, compressing, treating, processing, and transporting natural gas; gathering, stabilizing, and transporting condensate, natural gas liquids (NGLs), and crude oil; and gathering and disposing of produced water. It also buys and sells residue, NGLs, and condensates. The company operates assets located in Texas, New Mexico, and the Rocky Mountains. It also provides water handling solutions. The company was formerly known as Western Gas Equity Partners, LP and changed its name to Western Midstream Partners, LP in February 2019. Western Midstream Partners, LP was incorporated in 2007 and is based in The Woodlands, Texas.

Cosan S.A. engages in the fuel distribution business. It operates through Raízen, Compass, Moove, Rumo, and Radar segments. The company’s Raízen segment engages in the production, marketing, origination, and trading of sugar, as well as ethanol; production and marketing of bioenergy, and solar energy and biogas; trading and resale of electricity; and trading and marketing of fossil, renewable fuels, and lubricants under the Shell brand. Its Compass segment distributes piped natural gas to industrial, residential, commercial, automotive, and cogeneration customers; and marketing of natural gas. The company’s Moove segment produces, formulates, and distributes lubricants, base oils, and specialties under the Mobil brand and various proprietary brands for industrial, commercial, and passenger vehicles. Its Rumo segment provides logistics services for rail transportation, storage, and port loading of commodities, including grains and sugar; locomotive and railcar leasing; and rail equipment and container operations. The company’s Radar segment manages agricultural property. The company operates in Brazil, England, France, Spain, Portugal, Argentina, Bolivia, Uruguay, Paraguay, Singapore, United Arab Emirates, Oceania, the United States, Latin America, Europe, Asia, and internationally. Cosan S.A. was founded in 1936 and is headquartered in São Paulo, Brazil.

Latest Oil, Gas & Consumable Fuels and Western Midstream Partners, LP, Cosan S.A. Stock News

As of September 1, 2026, Western Midstream Partners, LP had a $20.2 billion market capitalization, compared to the Oil, Gas & Consumable Fuels median of $2.8 million. Western Midstream Partners, LP’s stock is up 23.9% in 2026, up 0.9% in the previous five trading days and up 24.94% in the past year.

Currently, Western Midstream Partners, LP’s price-earnings ratio is 15.5. Western Midstream Partners, LP’s trailing 12-month revenue is $4.3 billion with a 29.0% net profit margin. Year-over-year quarterly sales growth most recently was 30.0%. Analysts expect adjusted earnings to reach $3.721 per share for the current fiscal year. Western Midstream Partners, LP currently has a 7.6% dividend yield.

As of September 1, 2026, Cosan S.A. had a $3.0 billion market cap, putting it in the 59th percentile of all stocks. Cosan S.A.’s stock is down 26.3% in 2026, up 3.2% in the previous five trading days and down 30.14% in the past year.

Currently, Cosan S.A. does not have a price-earnings ratio. Cosan S.A.’s trailing 12-month revenue is $7.7 billion with a -22.2% net profit margin. Year-over-year quarterly sales growth most recently was 8.2%. There are no analysts providing consensus earnings estimates for the current fiscal year. Cosan S.A. does not currently pay a dividend.

How We Compare Western Midstream Partners, LP and Cosan S.A. 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 Western Midstream Partners, LP and Cosan S.A.’s stock grades to see how they measure up against one another.

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Western Midstream Partners, LP and Cosan S.A. Growth Grades

Company	Ticker	Growth
Western Midstream Partners, LP	WES	A
Cosan S.A.	CSAN	C

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.

Western Midstream Partners, LP has a Growth Score of 95, which is Very Strong. Cosan S.A. has a Growth Score of 59, which is Average.

The Growth Grade Winner: Western Midstream Partners, LP

As you can clearly see from the Growth Grade breakdown above, Western Midstream Partners, LP has a more attractive growth grade than Cosan S.A.. For investors who focus solely on how a company is growing relative to other companies in the same industry, Western Midstream Partners, LP 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.

Western Midstream Partners, LP and Cosan S.A.’s Quality Grades

Company	Ticker	Quality
Western Midstream Partners, LP	WES	C
Cosan S.A.	CSAN	D

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks 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 the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

Western Midstream Partners, LP has a Quality Score of 44, which is Average. Cosan S.A. has a Quality Score of 33, which is Weak.

The Quality Stock Winner: No Clear Winner

Neither Western Midstream Partners, LP or Cosan S.A. has a high enough Quality 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 portfolios. It’s important to look at a wide range of financial metrics in order to determine if Western Midstream Partners, LP or Cosan S.A. is the better investment when it comes to quality.

Western Midstream Partners, LP and Cosan S.A.’s Momentum Grades

Company	Ticker	Momentum
Western Midstream Partners, LP	WES	B
Cosan S.A.	CSAN	D

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%.

Western Midstream Partners, LP has a Momentum Score of 65, which is Strong. Cosan S.A. has a Momentum Score of 26, which is Weak.

The Momentum Grade Winner: Western Midstream Partners, LP

As you can clearly see from the Momentum Grade breakdown above, Western Midstream Partners, LP is considered to have stronger momentum compared to Cosan S.A.. For those specifically looking for companies that have stronger momentum compared to other companies in the same industry, Western Midstream Partners, LP could be a good stock to invest in. However, it’s important for investors to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other Western Midstream Partners, LP and Cosan S.A. Grades

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

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).

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.

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 Western Midstream Partners, LP and Cosan S.A. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Western Midstream Partners, LP or Cosan S.A. Stock?

Overall, Western Midstream Partners, LP stock has a Growth Score of 95, Momentum Score of 65 and Quality Score of 44.

Cosan S.A. stock has a Growth Score of 59, Momentum Score of 26 and Quality Score of 33.

Comparing Western Midstream Partners, LP and Cosan S.A.’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.