RPM Mortgage, Alamo, CA, is in serious negotiations to buy at least two other mortgage banking firms – or their assets – and has its eye on at least one other shop, according to investment banking officials who claim to have knowledge of the situation. If the acquisitions come to fruition, they could put the privately held nonbank on track to be a $14 billion a year originator, said a source who advises the company. One of the target acquisitions is a $4 billion a year lender, the other a $650 million funder. A spokesman for RPM declined to comment. A few weeks back, RPM made...