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 ONEOK, Inc., Plains All American Pipeline or L.P. 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 ONEOK, Inc., Plains All American Pipeline and L.P. compare based on key financial metrics to determine which better meets your investment needs.

About ONEOK, Inc., Plains All American Pipeline and L.P.

ONEOK, Inc. operates as a midstream service provider of gathering, processing, fractionation, transportation, storage, and marine export services in the United States. It operates in four segments: Natural Gas Gathering and Processing; Natural Gas Liquids; Natural Gas Pipelines; and Refined Products and Crude. The company owns natural gas gathering pipelines and processing plants in the Mid-Continent, Permian Basin, North Texas, Gulf Coast region, and Rocky Mountain regions; and provides midstream services to producers of NGLs. It also owns NGL gathering and distribution pipelines, fractionation, terminal and storage facilities; and transports refined products, including gasoline, diesel fuel, aviation fuel, kerosene, and heating oil. In addition, the company transports and stores natural gas through regulated interstate and intrastate natural gas transmission pipelines, and natural gas storage facilities; it owns and operates a parking garage in downtown Tulsa, Oklahoma; and leases buildings, warehouses, office space, land, and equipment, including pipeline equipment, pipeline capacity, rail cars, and information technology equipment. Further, the company transports, stores, and distributes refined products, purity NGLs, and crude oil, as well as conducts commodity-related activities, including liquids blending and marketing activities. It serves integrated and independent exploration and production companies; other NGL and natural gas gathering and processing companies; crude oil and natural gas production companies; utilities; industrial companies; natural gasoline distributors; propane distributors; municipalities; ethanol producers; petrochemical, refining, and marketing companies; and diluent users, refineries, and exporters. ONEOK, Inc. was founded in 1906 and is headquartered in Tulsa, Oklahoma.

Plains All American Pipeline, L.P., through its subsidiaries, engages in the pipeline transportation, terminalling, storage, and gathering of crude oil and natural gas liquids (NGL) in the United States and Canada. The company operates through two segments, Crude Oil and NGL. The Crude Oil segment offers gathering and transporting crude oil through pipelines, trucks, and on barges or railcars. This segment provides terminalling, storage, and other related services, as well as merchant activities. The NGL segment is involved in natural gas processing and NGL fractionation, storage, transportation, and terminaling. This segment also includes ethane, propane, normal butane, iso-butane, and natural gasoline derived from natural gas production and processing activities, as well as crude oil refining processes. Its NGL components are used for various applications, such as heating, engine, and industrial fuels. The company was founded in 1981 and is headquartered in Houston, Texas. Plains All American Pipeline, L.P. operates as a subsidiary of Plains GP Holdings, L.P.

Latest Oil, Gas & Consumable Fuels and ONEOK, Inc., Plains All American Pipeline, L.P. Stock News

As of September 8, 2026, ONEOK, Inc. had a $61.5 billion market capitalization, compared to the Oil, Gas & Consumable Fuels median of $2.7 million. ONEOK, Inc.’s stock is up 32.7% in 2026, up 1.6% in the previous five trading days and up 34.26% in the past year.

Currently, ONEOK, Inc.’s price-earnings ratio is 16.9. ONEOK, Inc.’s trailing 12-month revenue is $39.4 billion with a 9.3% net profit margin. Year-over-year quarterly sales growth most recently was 52.8%. Analysts expect adjusted earnings to reach $5.893 per share for the current fiscal year. ONEOK, Inc. currently has a 4.4% dividend yield.

As of September 8, 2026, Plains All American Pipeline, L.P. had a $18.3 billion market cap, putting it in the 85th percentile of all stocks. Plains All American Pipeline, L.P.’s stock is up 44.6% in 2026, up 1.2% in the previous five trading days and up 50.78% in the past year.

Currently, Plains All American Pipeline, L.P.’s price-earnings ratio is 22.3. Plains All American Pipeline, L.P.’s trailing 12-month revenue is $52.3 billion with a 5.3% net profit margin. Year-over-year quarterly sales growth most recently was 66.3%. Analysts expect adjusted earnings to reach $1.689 per share for the current fiscal year. Plains All American Pipeline, L.P. currently has a 6.4% dividend yield.

How We Compare ONEOK, Inc., Plains All American Pipeline and L.P. 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 ONEOK, Inc., Plains All American Pipeline and L.P.’s stock grades to see how they measure up against one another.

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ONEOK, Inc., Plains All American Pipeline and L.P. Stock Value Grades

Company	Ticker	Value
ONEOK, Inc.	OKE	C
Plains All American Pipeline, L.P.	PAA	B

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.

ONEOK, Inc. has a Value Score of 45, which is Average. Plains All American Pipeline, L.P. has a Value Score of 74, which is Value.

The Value Stock Winner: Plains All American Pipeline, L.P.

As you can clearly see from the Value Grade breakdown above, Plains All American Pipeline, L.P. is considered to have better value than ONEOK, Inc.. For investors who focus solely on a company’s valuation, Plains All American Pipeline, L.P. 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.

ONEOK, Inc., Plains All American Pipeline and L.P.’s Quality Grades

Company	Ticker	Quality
ONEOK, Inc.	OKE	C
Plains All American Pipeline, L.P.	PAA	C

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.

ONEOK, Inc. has a Quality Score of 57, which is Average. Plains All American Pipeline, L.P. has a Quality Score of 60, which is Average.

The Quality Stock Winner: No Clear Winner

Neither ONEOK, Inc., Plains All American Pipeline or L.P. 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 ONEOK, Inc., Plains All American Pipeline or L.P. is the better investment when it comes to quality.

ONEOK, Inc., Plains All American Pipeline and L.P.’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
ONEOK, Inc.	OKE	D
Plains All American Pipeline, L.P.	PAA	D

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

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

ONEOK, Inc. has a Earnings Estimate Score of 37, which is Negative. Plains All American Pipeline, L.P. has a Earnings Estimate Score of 23, which is Negative.

The Earnings Estimate Revisions Stock Winner: No Clear Winner

Neither ONEOK, Inc., Plains All American Pipeline or L.P. has an Earnings Estimate Revisions Grade that could 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 ONEOK, Inc., Plains All American Pipeline or L.P. is the better investment when it comes to estimate revisions.

Other ONEOK, Inc., Plains All American Pipeline and L.P. Grades

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

Momentum grades help 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.

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

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 ONEOK, Inc., Plains All American Pipeline and L.P. pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, ONEOK, Inc., Plains All American Pipeline or L.P. Stock?

Overall, ONEOK, Inc. stock has a Value Score of 45, Estimate Revisions Score of 37 and Quality Score of 57.

Plains All American Pipeline, L.P. stock has a Value Score of 74, Estimate Revisions Score of 23 and Quality Score of 60.

Comparing ONEOK, Inc., Plains All American Pipeline and L.P.’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.