manager	shares	port %	label
Thomas Russo - Gardner Russo & Quinn	5,974	<0.01%		history
Warren Buffett - Berkshire Hathaway	1,169,507	0.06%	New	history
Thomas Gayner - Markel Group	158,000	0.16%	Add	history
Tom Bancroft - Makaira Partners	224,260	8.3%		history