EnerJex Resources Inc. (NYSE MKT: ENRJ) closed its public offering of about 639.2 preferred shares for $15.2 million, the company said June 20.

The shares of 10% Series A cumulative redeemable perpetual preferred stock were priced at $23.75 each, the company said, adding that underwriters exercised their 45-day option to purchase 83,368 shares.

The shares began trading on the NYSE MKT exchange on June 17 under “ENRJPR,” the EnerJex said.

Net proceeds will support development of oil and natural gas properties in Kansas and Colorado, the company said. They will also support general corporate purposes, which might include credit facility repayments, EnerJex added.

Northland Capital Markets and Euro Pacific Capital were joint book-running managers, the company said.

San Antonio-based EnerJex Resources Inc. acquires and develops natural gas in the Midcontinent.