Warren Buffett acquired 8.3 Million Visa- Class A shares worth $1.65 Billion. That's 0.55% of their equity portfolio (19th largest holding). The first Visa- Class A trade was made in Q3 2011. Since then Warren Buffett bought shares seven more times and sold shares on six occasions. The stake costed the investor $262 Million, netting the investor a gain of 530% so far.