Occidental Petroleum (OXY) Market Cap 1985–2026

As of September 28, 2026, Occidental Petroleum had a market cap of $56.08 billion, which decreased by 1.34% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Sep 28, 2026, 4:00 PM ET
Occidental Petroleum logo

Occidental Petroleum Corp. (OXY)

🌍 United States 📈 NYSE 🏭 Energy 🏢 Oil, Gas & Consumable Fuels
Latest Market Cap
$56.08B ▼ 1.34%
Jan 1, 2026
$40.51B ▲ 38.43%
1 Year Ago
$47.35B ▲ 18.44%
All-Time High
$94.082B ▼ 40.39%


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Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 Occidental Petroleum Market Cap History by Year and Month

Occidental Petroleum Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2026$56.08B▲ 38.43%
$56.08B▼ 6.78%
$60.16B▲ 6.35%
$56.57B▲ 17.51%
$48.14B▼ 14.54%
$56.33B▼ 6.24%
$60.08B▼ 6.79%
$64.46B▲ 23.13%
$52.35B▲ 17.06%
$44.72B▲ 10.39%
2025$40.51B▼ 12.64%
2024$46.369B▼ 11.51%
2023$52.4B▼ 8.47%
2022$57.252B▲ 111.43%

All market cap values reflect closing prices for the period shown.


📊 Occidental Petroleum Market Cap and Other Industry Peers

Below are selected companies from the Energy sector / subsector:

  1. $668.28B
  2. $407.74B
  3. $267.68B
  4. $84.36B
  5. $73.9B
  6. $68.15B
  7. $59.49B
  8. $56.08B
  9. $56.06B
  10. $55.86B
  11. $53.73B
  12. $51.97B
  13. $31.19B
  14. $23.32B
  15. $19.99B
  16. $18.88B
  17. $17.84B
  18. $16.47B
  19. $14.84B
  20. $12.44B

Data reflect the most recent market capitalization values available.

💡 What Is Market Capitalization and How Do We Calculate It?

For Occidental Petroleum Corp. (OXY), market capitalization represents the total market value of the company’s publicly traded shares. It helps investors understand Occidental Petroleum’s size within the energy sector and compare it with other companies in the same industry.

In most cases, market capitalization is calculated by multiplying the current share price by the number of basic shares outstanding. Basic shares represent the actual number of common shares that currently exist, without including potential future shares from employee stock options, RSUs, warrants, or convertible securities. For example, if Occidental Petroleum had one million basic shares and each traded at $50, its market capitalization would be $50 million.

Formula:
Market Cap = Share Price × Shares Outstanding

The value of Occidental Petroleum’s market capitalization changes throughout the trading day because it mainly depends on the current share price. The number of shares outstanding typically remains stable unless the company issues new shares, buys back its own stock, or grants stock options to employees.

Based on the latest data, Occidental Petroleum had a market capitalization of $56.08 billion, placing it in the large-cap category within the energy industry.

Disclaimer: Despite all efforts, there may still be minor inaccuracies present in the data.