Bill Barrett Corp. (NYSE: BBG) priced an upsized public offering of 13.5 million common shares for total gross proceeds of about $99.9 million.

The net proceeds will support general corporate purposes including development, deleveraging, or future acquisitions, the company said Dec. 6.

Underwriters received 30 days to purchase about 2.02 million additional shares to cover overallotments.

J.P. Morgan is the sole book-runner.

Bill Barrett Corp. is based in Denver.