Law360, New York (November 02, 2011, 12:39 PM ET) -- Brian P. Lenihan is co-chairman of Choate Hall & Stewart LLP's private equity group, in the firm's Boston office. He represents private equity and venture capital funds in a broad range of financing transactions including leveraged buyouts, majority and minority recapitalizations, and growth equity investments. He also handles corporate transactions for private technology companies, including all types of mergers, acquisitions, venture capital financings and cross-border transactions.

Q: What is the most challenging transaction you have worked on and what made it challenging?

A: Last summer, we...