manager	shares	port %	label
Murray Stahl - Horizon Kinetics Asset Management	3,174	<0.01%	Reduce	history
Warren Buffett - Berkshire Hathaway	4,986,588	0.15%		history
Valueact Capital - Valueact Holdings	1,773,148	2.5%	Add	history
Corvex Management	1,005,434	3.4%	Reduce	history