Atlas Resource Partners LP (NYSE: ARP) opened a public offering of 5,500,000 common units representing limited partner interests, the company said March 3.

Net proceeds will fund a previously announced natural gas assets acquisition from GeoMet Inc. (NasdaqCM: GMETP) and its subsidiaries, Atlas Resource said. Prior to funding, either all or part of the proceeds could support general partnership purposes, the company added. It noted that this may include repaying revolving credit borrowings.

The offering includes an underwriters’ monthlong option to purchase an additional 825,000 common units, the company said.

Joint book-running managers were Wells Fargo Securities LLC, Citigroup Inc. (NYSE: C), Deutsche Bank Securities Inc., J.P. Morgan, Morgan Stanley and RBC Capital Markets, Atlas Resource said.

Atlas Resource Partners LP is an E&P master limited partnership (MLP) that owns interest in U.S. natural gas and oil wells. It is based in Pittsburgh.