In the last year and a half, 182 U.S.-headquartered companies have been sold by one PE investor to another, according to the PitchBook Platform. 8 of those secondary buyouts have been billion dollar deals. So far this year, 49 secondary buyouts have been completed, putting 2011 behind last year's deal pace. During 2010, 133 secondary buyouts were closed. The B2B industry has accounted for 36% of the secondary buyout activity, making it the most active industry for secondary buyouts. The second most active is the B2C industry, which posted a 31% share.