Although no “large” mortgage companies have changed hands in quite some time, investor interest in small to medium-sized lenders remains strong as banks, private-equity funds and nonbanks continue to show their interest as buyers. Since last fall, at least 25 deals have been publicly disclosed, according to sales tracked by Inside Mortgage Finance, but none of the originators have been larger than $4 billion a year in production. According to interviews conducted over the past week with investment banking advisors, in the months ahead lenders that originate between $500 million to $2 billion a year are...