The majority of Warren's investments are in the secondary market. These transactions are effectively just transferring ownership and don't actually make cash infusions into the companies at all. He makes some primary market investments and allocates capital between his fully owned subsidiaries. But I think many people naturally wonder the value to society of getting rich by buying and selling things in a secondary market. No products or services are produced and his gains(over the market return) come from a zero sum game between buyers and sellers.