Abarta Oil & Gas Co. Inc. has raised $24.75 million, according to a filing with the U.S. Securities and Exchange Commission. Calls to the company were not returned. It is part of Abarta Inc., one of Pittsburgh's largest private companies, which entered the energy business in the late 1970s and holds interests in oil and gas wells, processing facilities and natural gas pipelines in Pennsylvania, Ohio, West Virginia, Kentucky, Louisiana and Kansas. A family business launched in 1933 and originally…