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 Diamondback Energy, Inc. or ConocoPhillips 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 Diamondback Energy, Inc. and ConocoPhillips compare based on key financial metrics to determine which better meets your investment needs.

About Diamondback Energy, Inc. and ConocoPhillips

Diamondback Energy, Inc., an independent oil and natural gas company, acquires, develops, explores, and exploits unconventional, onshore oil and natural gas reserves in the Permian Basin in West Texas, the United States. The company primarily focuses on the development of the Spraberry and Wolfcamp formations of the Midland Basin; and the Wolfcamp and Bone Spring formations of the Delaware Basin, both of which are part of the Permian Basin in West Texas and New Mexico. Diamondback Energy, Inc. was founded in 2007 and is headquartered in Midland, Texas.

ConocoPhillips explores for, produces, transports, and markets crude oil, bitumen, natural gas, liquefied natural gas (LNG), and natural gas liquids. It operates in five segments: Alaska; Lower 48; Canada; Europe, Middle East and North Africa; and Asia Pacific. The company’s portfolio includes unconventional plays in North America; conventional assets in North America, Europe, Asia, and Australia; global LNG developments; oil sands assets in Canada; and an inventory of global exploration prospects. It serves in the United States, Canada, China, Equatorial Guinea, Libya, Malaysia, Norway, Singapore, the United Kingdom, and internationally. ConocoPhillips was founded in 1917 and is headquartered in Houston, Texas.

Latest Oil, Gas & Consumable Fuels and Diamondback Energy, Inc., ConocoPhillips Stock News

As of April 14, 2026, Diamondback Energy, Inc. had a $52.5 billion market capitalization, compared to the Oil, Gas & Consumable Fuels median of $2.5 million. Diamondback Energy, Inc.’s stock is up 24% in 2026, in the previous five trading days and up 51.49% in the past year.

Currently, Diamondback Energy, Inc.’s price-earnings ratio is 32.6. Diamondback Energy, Inc.’s trailing 12-month revenue is $14.3 billion with a 11.6% net profit margin. Year-over-year quarterly sales growth most recently was -9.4%. Analysts expect adjusted earnings to reach $15.729 per share for the current fiscal year. Diamondback Energy, Inc. currently has a 2.3% dividend yield.

As of April 14, 2026, ConocoPhillips had a $144.8 billion market cap, putting it in the 98th percentile of all stocks. ConocoPhillips’s stock is up 27.2% in 2026, down 4.9% in the previous five trading days and up 42.62% in the past year.

Currently, ConocoPhillips’s price-earnings ratio is 18.7. ConocoPhillips’s trailing 12-month revenue is $60.3 billion with a 13.3% net profit margin. Year-over-year quarterly sales growth most recently was -6.8%. Analysts expect adjusted earnings to reach $7.422 per share for the current fiscal year. ConocoPhillips currently has a 2.8% dividend yield.

How We Compare Diamondback Energy, Inc. and ConocoPhillips 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 Diamondback Energy, Inc. and ConocoPhillips’s stock grades to see how they measure up against one another.

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Diamondback Energy, Inc. and ConocoPhillips Stock Value Grades

Company	Ticker	Value
Diamondback Energy, Inc.	FANG	C
ConocoPhillips	COP	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.

Diamondback Energy, Inc. has a Value Score of 57, which is Average. ConocoPhillips has a Value Score of 49, which is Average.

The Value Stock Winner: No Clear Winner

Neither Diamondback Energy, Inc. or ConocoPhillips 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 Diamondback Energy, Inc. or ConocoPhillips is the better investment when it comes to value.

Diamondback Energy, Inc. and ConocoPhillips’s Quality Grades

Company	Ticker	Quality
Diamondback Energy, Inc.	FANG	B
ConocoPhillips	COP	B

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.

Diamondback Energy, Inc. has a Quality Score of 61, which is Strong. ConocoPhillips has a Quality Score of 76, which is Strong.

The Quality Grade Winner: It’s a Tie!

Looking at the Quality Grade breakdown above, both Diamondback Energy, Inc. and ConocoPhillips have a grade of B. For investors who focus solely on a company’s overall quality, you will need to conduct further research into both companies to see if they are a good fit for your portfolio. As a good rule of thumb, you should always analyze multiple factors based on a wide range of metrics before choosing a company to invest in.

Diamondback Energy, Inc. and ConocoPhillips’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
Diamondback Energy, Inc.	FANG	B
ConocoPhillips	COP	B

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.

Diamondback Energy, Inc. has a Earnings Estimate Score of 62, which is Positive. ConocoPhillips has a Earnings Estimate Score of 72, which is Positive.

The Earnings Estimate Revisions Grade Winner: It’s a Tie!

Looking at the Earnings Estimate Revisions Grade breakdown above, both Diamondback Energy, Inc. and ConocoPhillips have a grade of B. For those focusing solely on a company’s estimate revisions, other financial metrics will need to be evaluated to determine whether Diamondback Energy, Inc. or ConocoPhillips is a better fit.

Other Diamondback Energy, Inc. and ConocoPhillips Grades

In addition to Value, Quality and Estimate Revisions, 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 Diamondback Energy, Inc. and ConocoPhillips pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, Diamondback Energy, Inc. or ConocoPhillips Stock?

Overall, Diamondback Energy, Inc. stock has a Value Score of 57, Estimate Revisions Score of 62 and Quality Score of 61.

ConocoPhillips stock has a Value Score of 49, Estimate Revisions Score of 72 and Quality Score of 76.

Comparing Diamondback Energy, Inc. and ConocoPhillips’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.