Meeker is leading an exodus in a huge split at one of Silicon Valley’s most famous firms. Mary Meeker of Kleiner Perkins Caufield & Byers, one of the premier Silicon Valley investors at one of its premier venture capital firms, is leaving her position in an abrupt, high-profile splitting of the firm she helped lead. Meeker is leading an exodus of late-stage investors from Kleiner Perkins in its most dramatic shake-up since legendary investor John Doerr stepped back from his role more than two years ago.