In 1999, Andrew Weinreich sold Six Degrees, a social networking site based on the same idea that sparked the likes of LinkedIn and Facebook, for $125 million. In the following years, he went on to sell three other companies including one to IBM and another to Match.com. Most founders are lucky to have one successful exit, but Weinreich has already had four. In this interview, you'll learn: The common denominator among all four of Weinreich's exits. Where to find the company with the highest probability of acquiring you. How to hire an M&A professional for a "Dual Track" mandate. The mistake most entrepreneurs make when they assemble a board. The simple technique Weinreich used to let buyers know he was interested in being acquired (without sounding desperate).