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Image courtesy of ConocoPhillips.

ConocoPhillips is currently the largest U.S. oil company, according to data collected by Fortune.

According to Fortune, ConocoPhillips is the largest pure oil and gas company in the United States with a $54 billion market capitalization and $3.52 billion in earnings before interest, tax, depreciation and amortization (EBITDA).

ConocoPhillips took the top spot despite a negative 11.3 percent year-to-date total shareholder return including dividends, the lowest rate of return of all the companies in the top 10.

The list excludes integrated energy companies like ExxonMobil, currently the largest energy company in the United States on a market capitalization basis.

EOG Resources took the second spot with a $45.9 billion market capitalization and $2.43 billion in EBITDA.

Anadarko Petroleum, Pioneer Natural Resources and Apache Corporation rounded out the top five.

Pioneer had the lowest debt to EBITDA ration out of the top ten while Anadarko had the highest debt to EBITDA ratio with a ratio of 8.6.

Noble Energy took the tenth spot with a market capitalization of $15.4 billion and an EBITDA of $1.29 billion.