Bill Ackman's position in Mastercard Incorporated is currently worth $1.21B. That's 5.88% of their entire equity portfolio (8th largest holding). The first Mastercard Incorporated trade was made in Q3 2008. Since then Bill Ackman bought shares one more times and sold shares on one occasions. The stake costed the investor $1.06B, netting the investor a gain of 14% so far.