manager	shares	port %	label
John Rogers - Ariel Investments	6,387,318	2.6%	Add	history
Ron Baron - Bamco Inc. (Baron Capital)	1,947,402	0.21%	Reduce	history
Thomas Gayner - Markel Group	1,327,000	0.59%		history
Vulcan Value Partners	8,435,231	5.0%	Reduce	history