Since 2008, Qatalyst has grown from three employees to 53, and it says it has advised on more than 90 deals, including the sales of OpenTable, Motorola Mobility and Dropcam.
Naming Mr. Boutros, 55, chief executive is a promotion that formally recognizes the role that the banker — who has worked with Mr. Quattrone since 1992 — has been playing at Qatalyst.
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"George is one of the most experienced and accomplished M.&A. advisers on the planet," Mr. Quattrone said in a statement. "He is very highly regarded by both our clients and team members at all levels, and I am confident that his leadership will propel Qatalyst to exciting new heights in the years ahead."
Mr. Quattrone will become executive chairman and focus on strategy. Other bankers at Qatalyst received promotions as well, including Jason DiLullo and Jonathan Turner, who have been named co-presidents.