Jan 30 (Reuters) - Private equity-backed oil and natural

gas producer Infinity Natural Resources ( INR ) on Thursday raised $265

million in its initial public offering in the United States.

The company, backed by buyout firms Pearl Energy

Investments and NGP, sold 13.5 million shares at $20, within

marketed range

of $18 and $21.

Energy has been a major theme in the IPO market so far

this year as companies increasingly look to tap into investor

fervor towards the industry.

Infinity, which tapped 14 banks for the IPO, is expected

to begin trading on the New York Stock Exchange under the symbol

"INR" on Friday.