Mid-market specialist investor Bridgepoint Group, which manages $87 billion of assets, spent more than a year pursuing Interpath, the financial advisory and restructuring services firm.  Bridgepoint initially sought to pre-empt a formal sale by building a relationship with Interpath’s management team, led by Mark Raddan, but the seller, HIG Capital, ultimately opted to run a competitive auction. Blackstone, Onex, PAI Partners and Permira were all reported to have been underbidders. However, Bridgepoint’s deep familiarity with the business meant it led the process from the outset, submitting a strong first-round offer with minimal execution risk. This morning, Bridgepoint agreed to acquire…