Market cap is the total market value to buy the whole company. It is equal to the share price times the number of Shares Outstanding (EOP). Williams's share price for the quarter that ended in Mar. 2026 was €63.22. Williams's Shares Outstanding (EOP) for the quarter that ended in Mar. 2026 was 1,223 Mil. Therefore, Williams's market cap for the quarter that ended in Mar. 2026 was €77,318 Mil.
Williams's quarterly market cap
declined
from Sep. 2025 (€65,585 Mil) to Dec. 2025 (€61,992 Mil) but then
increased
from Dec. 2025 (€61,992 Mil) to Mar. 2026 (€77,318 Mil).
Williams's annual market cap
increased
from Dec. 2023 (€38,162 Mil) to Dec. 2024 (€62,596 Mil) but then
declined
from Dec. 2024 (€62,596 Mil) to Dec. 2025 (€61,992 Mil).
Enterprise Value is the theoretical takeover price. It is more comprehensive than market capitalization (market cap), which only includes common equity. Enterprise Value is calculated as the market cap plus debt and minority interest and preferred shares, minus total cash and cash equivalents. Williams's Enterprise Value for Today is €111,619 Mil.
Williams (HAM:WMB) Market Cap Explanation
Market cap is not the real price you pay for a company. If you buy the company and become its owner, you become the owner of the cash the company has, and you also assume the companys debt. The real price you pay is the Enterprise Value.
Warren Buffett uses the ratio of total market cap of all public traded companies over GDP to measure if the market is expensive. As of April 2012, the US total market cap is about $14.7 trillion, while the US GDP is about $15 trillion. The market was modestly overvalued.
Williams Market Cap Related Terms
Williams Market Cap Historical Data
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The historical data trend for Williams's Market Cap 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.
For the Oil & Gas Midstream subindustry, Williams's Market Cap, along with its competitors' market caps and Market Cap 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.
Williams Market Cap vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Williams's Market Cap distribution charts can be found below:
* The bar in red indicates where Williams's Market Cap falls into.
Market cap is the short version of market capitalization. It is the total market value to buy the whole company. It is equal to the share price times the number of shares outstanding.
Williams's Market Cap for the fiscal year that ended in Dec. 2025 is calculated as
* 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.
Williams (HAM:WMB) has a Market Cap of €83,879 Mil as of Jun. 27, 2026. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on Williams and its competitors. According to the industry distribution chart, Williams ranks #13 out of 1043 companies in the Oil & Gas industry, placing it in the top 1.2%.
Is Williams' Market Cap too high?
Williams' current Market Cap is €83,879 Mil. Based on the distribution chart, Williams ranks #13 out of 1043 companies in the Oil & Gas industry, which is in the top quartile — a strong position relative to peers. Overall, Williams has a GF Score™ of 78/100, reflecting its overall financial health beyond just this single metric.
How does Williams' Market Cap compare to EPD and KMI?
According to the Oil & Gas industry distribution chart, Williams ranks #13 out of 1043 companies for Market Cap. This places Williams in the top 1% of its industry — outperforming the majority of peers. The industry median Market Cap is 206.34. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Market Cap for an Oil & Gas company?
The median Market Cap among Oil & Gas companies is 206.34, based on 1,043 companies in the industry. Companies in the top quartile (top 25%) have a Market Cap significantly above this median, while those in the bottom quartile fall well below. However, Market Cap 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 Market Cap mean?
A high Market Cap can signal that a stock is expensive relative to its fundamentals. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on Williams and its competitors. For the Oil & Gas industry, the median Market Cap is 206.34 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Williams's current Market Cap is €83,879 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Williams stock overvalued right now?
Williams (HAM:WMB) has a current Market Cap of €83,879 Mil. The stock's GF Value™ is €53.21, compared to a current price of €68.54 — trading 28.8% above its estimated fair value. The current Market Cap is €83,879 Mil. Williams' overall GF Score™ is 78/100 with 11 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Market Cap calculated?
Market Cap is calculated from a company's financial statements. For Williams (HAM:WMB), the current Market Cap is €83,879 Mil as of Jun. 27, 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 Williams (HAM:WMB) Overvalued in 2026?
Based on GuruFocus' analysis, Williams stock appears to be overvalued.
The current stock price of €68.54 is trading 28.8% above its estimated GF Value™ of €53.21.
Key valuation signals for HAM:WMB:
Market Cap: €83,879 Mil
GF Value™: €53.21 vs. price of €68.54 (28.8% above fair value)
No single metric tells the full story. See the HAM:WMB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Williams operates the Transco pipeline, which connects the Gulf Coast to the Northeast United States. It has additional natural gas transmission pipelines connecting the Rockies to the Pacific Northwest and midcontinent. At the field level, it operates substantial gathering and processing assets in Appalachia and other basins. The company has also struck several power supply agreements.
78GF Score
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