From a review of companiesmarketcap.com and the Google Finance website, there were four Russian Oil & Gas Companies with stock market caps above US$10 bil recently.
And from a review of company filings with the SEC, companiesmarketcap.com, the Google Finance website and the finviz stock screener website, I identified the four largest US Oil & Gas Companies and also the four largest European Oil & Gas Companies, both by stock market cap.
From their financial statements filed with the US SEC or their financial statements included in their Companies' investor relations website, the table below shows the Pretax Income (Loss) From Continuing Operations for annual 2021, 2020 and 2019 for each of these 12 Oil & Gas-Related Companies.