Shares outstanding are shares that have been authorized, issued, and purchased by investors and are held by them. Phillips 66's shares outstanding for the quarter that ended in Mar. 2026 was 401 Mil.
Phillips 66's quarterly shares outstanding
declined
from Dec. 2025 (401 Mil) to Mar. 2026 (401 Mil).
It means Phillips 66bought back shares from Dec. 2025 to Mar. 2026 .
Phillips 66's annual shares outstanding
declined
from Dec. 2024 (408 Mil) to Dec. 2025 (401 Mil).
It means Phillips 66bought back shares from Dec. 2024 to Dec. 2025 .
A company may buy back shares or issue shares in any fiscal period. If a company buys back shares, we should observe that the total number of shares decline. If the company issues new shares, the number of shares outstanding increases.
Usually the presence of treasury shares and a history of buyback are good indicators that company has competitive advantage. But studies have shown that companies usually buy back at wrong time. Buying back shares below its intrinsic value increases value for remaining shareholders. Buying back overvalued shares destroys value for existing shareholders.
Be Aware
Warren Buffett looks for consistency and upward long term trend. Because of share repurchase it is possible for net earnings trend to differ from EPS trend. He preferred net income over EPS. The companies with durable competitive advantage companies report higher % net earnings to total revenues.
Important: If a company is showing net earnings history greater than 20% on total revenues, it is probably benefiting from a long term competitive advantage.
If net earnings is less than 10%, likely to be in a highly competitive business.
Phillips 66 Shares Outstanding (EOP) Related Terms
Phillips 66 Shares Outstanding (EOP) Historical Data
* Premium members only.
The historical data trend for Phillips 66's Shares Outstanding (EOP) can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
XSWX:PSX vs MPC, VLO, DINO: Shares Outstanding (EOP) Comparison
For the Oil & Gas Refining & Marketing subindustry, Phillips 66's Shares Outstanding (EOP), along with its competitors' market caps and Shares Outstanding (EOP) data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
Phillips 66 Shares Outstanding (EOP) vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Phillips 66's Shares Outstanding (EOP) distribution charts can be found below:
* The bar in red indicates where Phillips 66's Shares Outstanding (EOP) falls into.
Shares outstanding are shares that have been authorized, issued, and purchased by investors and are held by them. They have voting rights and represent ownership in the corporation by the person that holds the shares. They should be distinguished from treasury shares, which are shares held by the corporation itself, having no exercisable rights.
Shares outstanding can be calculated as either basic or fully diluted. The fully diluted shares outstanding count includes diluting securities, such as options, warrants or convertibles.
What does a Shares Outstanding (EOP) of 401 Mil mean?
Phillips 66 (XSWX:PSX) has a Shares Outstanding (EOP) of 401 Mil as of Mar. 2026. The total shares a company has outstanding, at period-end. View historical data on Phillips 66 and its competitors.
Is Phillips 66's Shares Outstanding (EOP) too high?
Phillips 66's current Shares Outstanding (EOP) is 401 Mil. Overall, Phillips 66 has a GF Score™ of 68/100, reflecting its overall financial health beyond just this single metric.
How does Phillips 66's Shares Outstanding (EOP) compare to MPC and VLO?
Phillips 66's Shares Outstanding (EOP) of 401 Mil can be compared against companies in the Oil & Gas industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shares Outstanding (EOP) for an Oil & Gas company?
A good Shares Outstanding (EOP) depends on the Oil & Gas industry context. However, Shares Outstanding (EOP) should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shares Outstanding (EOP) mean?
A high Shares Outstanding (EOP) can signal that a stock is expensive relative to its fundamentals. The total shares a company has outstanding, at period-end. View historical data on Phillips 66 and its competitors. Phillips 66's current Shares Outstanding (EOP) is 401 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Phillips 66 stock overvalued right now?
Phillips 66 (XSWX:PSX) has a current Shares Outstanding (EOP) of 401 Mil. The stock's GF Value™ is CHF109.85, compared to a current price of CHF138.77 — trading 26.3% above its estimated fair value. The current Shares Outstanding (EOP) is 401 Mil. Phillips 66's overall GF Score™ is 68/100 with 6 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shares Outstanding (EOP) calculated?
Shares Outstanding (EOP) is calculated from a company's financial statements. For Phillips 66 (XSWX:PSX), the current Shares Outstanding (EOP) is 401 Mil as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is Phillips 66 (XSWX:PSX) Overvalued in 2026?
Based on GuruFocus' analysis, Phillips 66 stock appears to be overvalued.
The current stock price of CHF138.77 is trading 26.3% above its estimated GF Value™ of CHF109.85.
Key valuation signals for XSWX:PSX:
Shares Outstanding (EOP): 401 Mil
GF Value™: CHF109.85 vs. price of CHF138.77 (26.3% above fair value)
No single metric tells the full story. See the XSWX:PSX stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Phillips 66 is an independent refiner that owns or holds interest in 10 refineries with a total crude throughput capacity of 2.0 million barrels per day, or mmb/d, at the end of 2025. The midstream segment comprises extensive transportation and NGL processing assets. It includes 70,000 miles of crude oil, refined petroleum product, NGL and natural gas pipeline systems, and a comprehensive set of refined petroleum product, NGL and crude oil terminals, gathering and processing plants and fractionation facilities and various other storage and loading facilities. Its CPChem chemical joint venture operates facilities primarily in the United States and the Middle East and produces olefins and polyolefins.
68GF Score
Get the complete analysis for XSWX:PSX
Shares Outstanding (EOP) is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
XSWX:PSX has been successfully added to your 
